Font size
WorksheetsAssessment 2
Total questions: 128
Worksheet time: 1hrs 4mins
Sclerotome forms
The skeletal muscles of the body
The Vertebrate, ribs and parts of skull
Urinary organ like kidney
The dermis of the skin
All of the following are true about synapses except?
Chemical synapses more common than electrical synapses
Electrical synapses cause bidirectional, quick transmission that do not integrate information
Chemical synapses use neurotransmitters & cause unidirectional transmission
Presence of synaptic cleft & delay in chemical synapses
Chemical synapses are always excitatory
Cell is the building block of any organism and this has been demonstrated by renowned scientist. Among the following who is the first one to recognize this?
Louis Pasteur
John Needham
Robert Hooke
Agostin Bassi
An immediate available energy source in muscle is:
Oxidative phosphorylation
Krebs cycle
Glycolysis
Creatine phosphate
All are elevation from the bone except
Epicondyle
Malleolus
Protuberance
Foramen
None
Mycoplasma is different from other bacteria since it lacks an organelle that is found in other bacteria. Which organelle is lacking?
Cell membrane
Cell wall
Chromosome
Ribosome
Which one is common to Down syndrome, Turner syndrome and Patau Syndrome?
Short stature
Congenital heart disease
Mental retardation
Thick skin fold
The epiblast
Is formed during the third week of development
It forms the roof of the amniotic cavity
It differentiates directly or indirectly in to ectoderm, mesoderm and endoderm
It is the inner layer of cells in an early embryo.
Repetitive stimulation of a skeletal muscle fiber will cause an increase in contractile strength due to an increase in which of the following?
The magnitude of the end-plate potential
The number of muscle myofibrils generating tension
The velocity of muscle contraction
The concentration of calcium in the sarcoplasm
All happen during seventeen to twenty weeks of fetal period except
Brown fat forms
Quickening is commonly felt by the mother
The skin is covered with vernix caseosa
The secretory epithelial cells in the interalveolar walls of the lung have begun to secrete surfactant
What makes Doppler study different from conventional Ultrasonography?
Audibility
Color coding of moving cells
Spectral analysis of motion
All
Pick the benign neoplasm among the following list of neoplasms
Neuroblastoma
Osteoblastoma
Medulloblastoma
Nephroblastoma
Glands usually associated with the skin of the genitals and the axillary region are known as
Sebaceous glands
Apocrine glands
Eccrine glands
Errector pili glands
Which choronic villi develops at the end of the second week of human development
Tertiary chorionic villi
Primary chorionic villi
Secondary
This is the opening in the fetal heart that allows blood to move directly from the right to the left atrium
Foramen ovale
Umbilical vein
Umbilical artery
Pulmonary bypass
All are correct about the amniotic fluid except
It is large component is water
It is secreted from the fetal respiratory and gastrointestinal tracts
One of the causes for low amniotic fluid is esophageal atresia
It helps muscular development in the limbs
Identify the correct statement about relative refractory period of a neuron
The period of time at which Na inactivation gate will re-open
Is period during which strong stimulus does not cause another action potential
The period of time at which Na inactivation gate will not re-open
Second action potential can never be elicited even with suprathreshold stimulus
All of the above
The first system that start to function is
The endocrine system
The cardiovascular system
The respiratory system
The nervous system
The two subtypes of cholinergic receptors are
Nicotinic and dopaminergic
Dopaminergic and muscarinic
Adrenergic and nicotinic
Nicotinic and muscarinic
Which one of the following chemicals is causally strongly associated with hepatocellular carcinoma?
Aflatoxin
Benzene
Mercury
Asbestos
Persons with mild cognitive impairments who smoke may experience a worsening of symptoms if they stop smoking. This worsening of symptoms is because nicotine acts as an agonist for receptors of a particular neurotransmitter. That neurotransmitter is
Dopamine
Nitric oxide
Acetylcholine
Serotonin
Which one is incorrect about the Placenta?
It secretes hCG hormone
The umbilical cord usually attaches to the maternal surface of the placenta
Its fetal part develops from the chorionic sac
Maternal Surface of the Placenta has cotyledons
Which sequence best describes the events in action potential?
Depolarization__ hyperpolarization __repolarization__Polarization
Polarization__depolarization__hyperpolarization___repolarization
Depolarization__repolarization__Polarization___hyperpolarization
Polarization__depolarization__repolarization___hyperpolarization
Polarization__hyperpolarization__depolarization___repolarization
Which of these results from stimulation of alpha-adrenergic receptors?
Decreased heart rate
Dilation of bronchioles
Sweat gland secretion
Constriction of blood vessels
Necrosis
Coagulative necrosis occurs in the brain
. Liquifactive necrosis occurs in response to ischemia in tissues other than the brain
Caseous necrosis occurs due to tuberculosis infection
A process mainly via myosin regulates muscle contraction-relaxation phases in __________
Skeletal muscle
Both skeletal and cardiac
Both in smooth and cardiac
Smooth muscle
As cells progress from the deeper portion of the epidermis towards the surface
They divide continually by meiosis
They divide continually by mitosis
They become dermal cells
They become dermal cells
They become dermal cells
Early separation of embryonic blastomeres results in MZ twins with
Two amnions, two chorions, and one placenta
Two amnions, two chorions, and one placenta
Two amnions, two chorions, and one placenta
Two amnions, two chorions, and one placenta
A single motor neuron and all the skeletal muscle fibers it innervates constitute
A single motor neuron and all the skeletal muscle fibers it innervates constitute
A muscle triad
A muscle triad
A motor unit
Which one of the following types of muscles has the fastest response to single stimulation?
Cardiac and smooth
Smooth
Skeletal
Cardiac
The following pairs are bone cell types with their location. Identify the wrong pair
Osteoblasts - canaliculi
none
Osteocytes - lacunae
Osteogenic cells - endosteum
Osteoclasts - resorption bays
Which one of these is not a function of the blood?
Transport
Heat regulation
Defence
Sensation
The testes and ovaries have begun to descend during
The 20th weeks
The 16th weeks
The 24th weeks
The 26th weeks
The absolute refractory period of a neuron
Is due to the high negative polarity of the inside of the neuron
Occurs only during the depolarization phase
Occurs only during the repolarization phase
Occurs during depolarization and the first part of the repolarization phase
Which of the following neurotransmitters cause mostly EPSP & depolarization of postsynaptic neuron?
Norepinephrine and acetyl choline
Glycine and norepinephrine
GABA and glutamate
Glutamate and aspartate
All of the above
The endplate potential at the neuromuscular junction is the result of increased postsynaptic membrane permeability to
Sodium only
Potassium only
Sodium first, then potassium
Sodium and potassium simultaneously
Features of action potential includes all of the following except?
It has All or None principle
It has non decremental propagation of impulse from the origin
It is always depolarizing
It has refractory period
It has a property of summation
One of the following type of contraction does not produce movement or active resistance
Tonic contraction
Reflexive contraction
Isotonic contractions
Isometric contractions
An example of hypertrophy would be
The uterus during menstruation
The uterus during pregnancy
Breast development at puberty
Liver regeneration after partial hepatectomy
The usual expected date of delivery of a fetus from fertilization is
270 days
280 days
294 days
266 days
Effects of ionising radiation cannot be expressed in which of the following way?
Infertility of the repeatedly affected adults
Skin ulceration of affected individual
On the offsprings of the affected person
Immediate induction of cancer on neonates
Which one is correct about the gametogenesis?
Large amount of primary oocytes form after birth in females
Oogonia enlarge to form primary oocytes before birth
Maturation of oocyte completes if a sperm penetrates the primary oocyte
The process by which spermatogonia are transformed into mature sperm begins before birth
Which one of the following is not true about the structure of secondary bone tissue?
It characteristically shows multiple layers of calcified matrix
Lamellae are organized either parallel to each other or concentrically around a vascular canal
Lacunae with osteocytes are found between the lamellae, interconnected by canaliculi
In each lamella, type I collagen fibers are aligned in parallel and follow a helical course
None
Hair, nails, and the outer layer of the skin are made mostly of a tough waterproof protein called
Elastin
Collagen
Cerumen
Keratin
A 62-year-old male with COPD presents to the emergency room in respiratory distress. The attending physician uses succinylcholine to produce skeletal muscle relaxation prior to tracheal intubation. Soon after infusion of the succinylcholine, the patient develops bradycardia (abnormal slow heart rate).Which of the following drugs would counteract the bradycardia without affecting muscle relaxation?
Atropine
Epinephrine
Curare
Acetylcholine
Absence of the natural hollow structure of organs like trachea due to intrauterine abnormality is termed as
Hypoplasia
Aplasia
Agenesis
None
Which one is NOT correct about the sperm cell?
200 to 600 million sperms are deposited around the external os of the uterus and in the fornix of the vagina during sexual intercourse
The sperms move 2 to 3 mm per minute
Sperms are usually capacitated in the vagina
Sperm move more rapidly in the alkaline environment (uterus) than acidic environment (vagina)
A 22-year-old female takes a diet supplement containing ephedrine. Activation of the sympathetic nervous system by ephedrine causes tachycardia, palpitations, and contraction of the smooth muscle in which of the following?
Arterioles in the skin
Arterioles in the skin
Bronchioles
Pupils
Which one of the bones does not belongs to axial skeleton?
Sternum
Sacrum
Clavicle
Hyoid bone
Vertebral column
All of the following are found in the dermis except
Blood vessels
Nerve endings
Sebaceous glands
Melanocytes
Of the following properties of muscle, one can be defined as the ability to return to its original length when tension is released
Contractility
Elasticity
Excitability
Extensibility
Which of these fibers release norepinephrine?
Select one:
Postganglionic sympathetic fibers in sweat glands
Postganglionic sympathetic fibers in the heart
Preganglionic parasympathetic fibers
Postganglionic parasympathetic fibers
One of the following is false regarding motor unit
Select one:
None
A single muscle fiber can be initiated by more than one motor neuron
A skeletal muscle fiber cannot contract unless it is stimulated by a nerve impulse
A site where motor neuron meets muscle fiber is neuromuscular junction
The initial step in the process of many bacterial infections is adherence of the organism to mucous membranes. The bacterial component that mediates adherence is the
Select one:
Nucleoid
Peptidoglycan
Pili
Lipid A
Which of these is not a characteristic of synaptic potentials?
Select one:
They are all-or-none in amplitude
They are graded in amplitude
They are produced by chemically regulated gates.
They are produced in dendrites and cell bodies
They decrease in amplitude with distance
Pick the highly likely to be true statement among the following list of facts in neoplasms
Select one:
Areas for homing of tumor cells can easily be predicted
Almost all mutated cancer antigens are immunogenic !
All neoplasms have one or more RNA or DNA viruses as causative agents and a cancer can be eradicated by treating the viral infection which induced the transformation
Metastasis can occur in the absence of invasion
Which of the following structures in the hair would contain keratinized cuboidal cells?
Select one:
Cuticle
Shaft
Cortex
Medulla
Muscles that are best suited for brief high-intensity exercise would contain which of the following types of fibers?
Select one:
A mix of few glycolytic (white) and more fast twitch (red)
Mostly slow-twitch oxidative (red)
A mix of slow twitch (red) and fast twitch (red)
Mostly glycolytic (white)
Similarities between smooth and cardiac muscle include which of the following?
Select one:
Striated arrangement of the actin and myosin filaments
Ability to contract in the absence of an action potential
Role of myosin kinase in muscle contraction
Presence of a T tubule
Which on repeated exams could induce malignancy?
Select one:
Doppler study
CT
Conventional Ultrasonography
MRI
Where does the tricuspid valve prevent backflow of blood?
Select one:
From the left ventricle to the left atrium
From the left atrium to the left ventricle
From the right ventricle to the right atrium
From the right atrium to the right ventricle
A 35-year-old woman having an anxiety attack collapses. The physician who arrives on the scene notes that she is hyperventilating and suspects that she is suffering from tetany, a continuous contraction of skeletal muscle fibers caused by an increase in the excitability of nerves and muscle membranes. The increased membrane excitability is caused by which of the following?
Select one:
Depolarization of the nerve and muscle membranes
Decreased release of inhibitory neurotransmitter from nerve terminals
Spontaneous release of calcium from the sarcoplasmic reticulum
Increased frequency of the action potentials invading nerve terminals
Agents of genetic abnormality as cause of congenital anomaly are
Select one:
Chemicals
Radiation
Viruses
All
Select incorrect about Primitive streak
Select one:
Its appearance is the first sign of gastrulation.
It helps to identify the embryo's Craniocaudal axis
Its reminant forms thoracolumbar teratoma
Formed by epiblast cell
An individual having bluish sclera, rather than the usual white, with associated easily broken tibial bone has this disorder
Select one:
"
Achondroplasia
Osteopetrosis
Marfan syndrome
None
A feature which is not included in Down syndrome is:
Select one:
Cardiac anomaly
Mental retardation
Infertility
Conception during late maternal age
Macroglossia
During tail folding of an embryo, Part of the endodermal germ layer is incorporated into the embryo as the
Select one:
Foregut
Midgut
Hindgut
Glioblastoma is a highly malignant brain tumor with known vasculogenesis/angiogenesis potential: Which one of the following factors is frequently produced by the tumor for this purpose?
Select one:
Insulin-like growth factor
FGF
PDGF
ADH
Some bacteria inherently resistant for broad range of antibiotics and chemicals. Which organelle is more important for such characteristics of the bacteria?
Select one:
Cell wall
Plasmid
Pili
Endospore
One of the following muscle names are named according to muscle fiber orientation and location
Select one:
Levator Scapulae
Pectoralis major
Rectus abdominus
Brachioradialis
Which statement below most closely describes the role of calcium ions in the control of smooth muscle contraction?
Select one:
Binding of calcium ions to regulatory proteins associated with thick filaments, specifically calmodulin activates the enzymatic activity of myosin molecules
A high concentration of calcium ions in the myofilament space is required to maintain muscle in a relaxed state
Calcium ions serve as a direct inhibitor of the interaction of thick and thin filaments
Binding of calcium ions to regulatory proteins on thin filaments removes the inhibition of actin- myosin interaction
The neurotransmitter of preganglionic sympathetic fibers is
Select one:
Acetylcholine
Epinephrine
Norepinephrine
Dopamine
Testes and ovary are derived from
Select one:
Ectoderm
Intermediate mesoderm
Paraxial mesoderm
Lateral mesoderm
Which of the following disorders is an example of metaplasia?
Select one:
Increased Goblet cells in main stem bronchus of a smoker
Proliferative endometrial glands in a woman on unopposed estrogen
Multinucleated giant cells in a granuloma
None
The following pairs are cartilage types with their main fiber type. Identify the wrong pair
Select one:
Hyaline cartilage - type II collagen fibers
Elastic cartilage - elastic fibers
Fibrocartilage - type I collagen fibers
Fibrocartilage - reticular fibers
None
Under shoot of membrane potential is caused by
Select one:
An outward potassium and an inward Cl current
An outward sodium current
An outward calcium current
An inward potassium current
An inward calcium current
Which one of the following is not bone of the thorax?
Select one:
Ribs
Sternum
Clavicle
Thoracic vertebrae
None
The relaxation of smooth muscle is associated with a reduction in free intracellular calcium ion concentration. The effect of the reduction is
Select one:
Decreased phosphorylation of myosin molecules
Deactivation of the enzymatic activity of the individual actin molecules
Reduced contractile interaction by blocking the active sites of the myosin molecules
Establishment of the actin-myosin interaction
Propranolol is a beta blocker. It would therefore cause
Select one:
Vasodilation
Slowing of the heart rate
Secretion of saliva
Increased blood pressure
In a carcinoma arising from the right upper outer quadrant of a breast; which one of the following is most likely to be involved early?
Select one:
Right inguinal lymph node
Right side of lymph nodes along the internal mammary artery
Right axillary lymph nodes
Right side hilar lymph nodes in the lungs
What is the radiation energy used in fluoroscopy?
Select one:
Radio isotope
Magnetic radio frequency
Sound
X-ray
Skeletal, smooth, and cardiac muscle all have which of the following in common?
Select one:
All are striated
Their cellular structure is based on repeating sarcomeres
Initiation of contraction requires the binding of calcium ions to actin filaments
The contractile system is based on an enzymatic interaction of actin and myosin
Which one of the following imaging modality does not use ionizing radiation?
Select one:
Conventional radiography
Computed tomography /CT
Ultrasonography
Fluoroscopy
The relaxation of smooth muscle is associated with a reduction in free intracellular calcium ion concentration. The effect of the reduction is
Select one:
"
Reestablishment of the inhibition of the actin-myosin interaction
Decreased phosphorylation of myosin molecules
Deactivation of the enzymatic activity of the individual actin molecules
Reduced contractile interaction by blocking the active sites of the myosin molecules
Which of the following cells are responsible for fighting diseases?
Select one:
White Blood Cells !
Red Blood Cells
Platelets
All
Power stroke phase of skeletal muscle contraction
Select one:
Pulling of the actin molecules by myosin heads towards M line
Due to ATP binding to myosin head
The first conformational change of the myosin head
Activated by the energy stored by ATP cleavage
Choose the incorrect statement about skeletal muscles
Select one:
They cross at least one joint
The more moveable attachment of this muscles are their origin
These muscles only pull but do not push
None
Closure of rostral and caudal neuropore of neural tube occurs during which week of human development
Select one:
The fifth week
The six week
The fourth week
The third week
Vasculogenesis and angiogenesis begins in
Select one:
"
The second week of development
The third week of development
The first week of development
The forth up to eight week of development
Which of the following genes is named 'the Governor' of the genome for its effect in regulating the cell cycle?
Select one:
RAS
P53
MYC
RB
One of the following muscle types is cross striated and involuntary
Select one:
Skeletal
Cardiac
Smooth
None
One of the following regions of a skeletal muscle sarcomere is not affected by contraction.
Select one:
I-band
A-band
H-zone
All
The part of the decidua deep to the conceptus which forms maternal part of placenta is
Select one:
The decidua basalis
The decidua parietalis
The decidua capsularis
Extraembryonic structures are formed during
Select one:
The first week of development
The forth up to eight week of development
The third week of development
The second week of development
Postsynaptic inhibition is produced by
Select one:
Axoaxonic synapses
Depolarization of the postsynaptic membrane
Hyperpolarization of the postsynaptic membrane
Long-term potentiation
Primary bone tissue in adults is found in the following except
Select one:
Near sutures
Tooth sockets
Insertions of some tendons
A fractured bone undergoing repair
None
All happens during the first week development except
Select one:
By the end of first week, blastocyst is completely implanted in the endometrium
Cleavage of the zygote
Blastocytes differentiates in to inner and outer cell masses.
Formation of the blastocyst
Which organelle is lacking in prokaryotic cell?
Select one:
Cell membrane
Mitochondria
Chromosome
Ribosome
Which one of the following is not true about periosteum?
Select one:
Cover external surfaces of bone
Consists of a thick layer of more fibrous, dense connective tissue
Covers trabeculae of bone that project into marrow cavities
The innermost cellular layer of the periosteum contains osteoprogenitor cells, with the potential to divide by mitosis and differentiate into osteoblasts
None
Which factor mostly contributes for maintaining charge difference across the cell membrane (RMP)?
Select one:
Sodium-Potassium Pump
Donnan effect
Electrochemical gradient across the cell membrane
Leakage of more K than Na through resting channels
All of the above
Which of these is not a characteristic of action potentials?
Select one:
Na and K gates open at the same time
The membrane potential reverses polarity during depolarization
They are produced by voltage-regulated gates
They are conducted without decrement
The life threatening feature of Marfan syndrome is exemplified by
Select one:
Atrial septal defect
Kyphosis
Cardiomyopathy
Aortic dissection
Examples of hyperplasia include
Select one:
Glandular epithelium of pubertal breasts
Cardiac enlargement seen in hypertension
Skeletal muscle enlargement with weightlifting
Fatty liver
Which neuroglial cell types form BCSFB and BBB to neurons in the CNS respectively?
Select one:
Ependymal cells and Astrocyte
Microglia and satellite cells
Oligodendrocytes and Ependymal cells
Schwan cells and microglia
Choose the incorrectly matched CT covering of muscle
Select one:
Epimysium - whole muscle
Perimysium - the fascicles
Endomysium - each muscle fiber
None
Which one of the following is the strongest anti-tumor immune response?
Select one:
Cytotoxic T-cell mediated response
Complement mediated tumor response
Antibody mediated tumor cell destruction
Tumor destruction by macrophages
Which type of axonal transport is used to transport enzymes, cytoskeletal components, and new axoplasm down the axon during repair and regeneration of damaged axons?
Select one:
Fast anterograde axonal transport
Retrograde axonal transport
Slow anterograde axonal transport
Motor molecules kinesin and dynein
None of the above
A 59-year-old woman with bilateral glaucoma is treated with drops of the parasympathetic agent pilocarpine. Cholinergic stimulation of the pupil causes which of the following?
Select one:
Inequality of pupil size
Absence of the pupillary response to light
Pupillary dilation
Pupillary constriction
During skeletal and cardiac muscle cells contraction, what happens because of Calcium binding to troponin?
Select one:
Activation of calmodulin
Acetylcholine (ACh) is released
The binding site on actin is uncovered
The cross-bridge disengages from the thin filament
Chorion is formed from
Select one:
The intraembryonic splanchnic mesoderm and the two layers of trophoblast
The extraembryonic splanchnic mesoderm and the two layers of trophoblast
The extraembryonic somatic mesoderm and the two layers of trophoblast
The intraembryonic splanchnic mesoderm and the two layers of trophoblast
All are correct about the gametes except
Select one:
The oocyte is surrounded by the zona pellucida and the corona radiata
The head of the sperm contains nucleus and mitochondria
The oocyte is immotile
The sperm is highly motile
All happens in the organogenetic period except
Select one:
By sixth Week, Auricle forms from auricular hillocks.
By the end of the seventh week, ossification of the bones of the lower limbs has begun.
By the end of the fourth week, the fourth pair of pharyngeal arches are visible
By the end of the eighth week, the embryo has distinct human characteristics
Which one is not the feature of saltatory conduction?
Select one:
Step by step depolarization
Jumping propagation
Occurs in myelinated fibers
Occurs in myelinated fibers
Faster and occurs at Node of ranvier
Regarding smooth muscle, initiation of contraction is due to which of the following mechanisms?
Select one:
K influx
Ca influx
Cl influx
Na influx
The factor most important in producing an isometric contraction is
Select one:
Stimulating while a muscle is under tetanic contraction
Providing a stimulus adequate to activate all motor units
Determining the resting length of the muscle
Keeping the muscle from changing its length
A 16-year-old highly allergic girl who is stung by a bee gives herself a shot of epinephrine prescribed by her physician. Because epinephrine activates B-adrenergic receptors it will relieve the effects of the bee sting by decreasing which of the following?
Select one:
The transport of calcium into skeletal muscle fibers
The contraction of airway smooth muscle
The strength of ventricular muscle contraction
The rate of depolarization in the SA node
Which one of the following conditions does not fulfill the criteria for a definition of a neoplasm?
Select one:
Lipoma
Lymphoma
Hamartoma
Seminoma
Which one of the following is the most accurate description of the structural differences between gram-positive bacteria and gram-negative bacteria?
Select one:
Gram-positive bacteria have a thick peptidoglycan layer, whereas gram negative bacteria have a thin layer.
Gram-positive bacteria have plasmids, whereas gram-negative bacteria do not.
Gram-positive bacteria form a sex pilus that mediates conjugation, whereas gram-negative bacteria do not.
Gram-positive bacteria have an outer lipid-rich membrane, whereas gram negative bacteria do not.
Which one of the following is a misnomer benign/non-neoplastic /condition related to tuberculoma?
Select one:
Leiomyoma
Granuloma
Hemangioma
Choriostoma
Among the following who is identified Mycobacterium tuberculosis as etiologic agent of tuberculosis?
Select one:
Anton van Leeuwenhoek
Robert Koch
Rudolf Virchow
John Needham
Which of the following is considered enabler of malignancy?
Select one:
Evasion of apoptosis
Genomic instability
Angiogenesis
Altered cellular metabolism
An increase in force of a skeletal muscle contraction can be achieved by
Select one:
Increased extracellular calcium
Recruitment of motor units
Recruitment of muscle fibres
Recruitment of nerve fibres
In the skin, errector pili muscles are found mainly in the
Select one:
Dermis layer
Stratum spinosum
Stratum basale
Stratum corneum
Stratum granulosum
As the strength of a depolarizing stimulus to an axon is increased
Select one:
The speed with which action potentials are conducted increases
The duration of action potentials increases
The amplitude of action potentials increases
The frequency with which action potentials are produced increases
All happens during Twenty-six to Twenty-nine Weeks except
Select one:
The CNS has matured to the stage where it can: Direct rhythmic breathing movements and Control body temperature
A fetus survives with low birth weight exchange
The lungs and pulmonary vasculature have developed sufficiently to provide adequate gas
The eyelids are open
Who showed the epidemiological link of infectious with the source of infection, and proved that physical measures could prevent the transmission of infection?
Select one:
Ignaz Semmerlweis
John Snow
Agostin Bassi
Joseph Lister
The only movable bone of the skull is
Select one:
Maxilla
Mandible
Frontal
Vomer
None
The correct answer is: Mandible
If a boy starts to be clumsy and weak at 6 years of age and becomes wheel chair dependent at 12 yrs. of age. What disorder is likely he has?
Select one:
Duchenne muscular dystrophy
Ricket
Becher muscular dystrophy
Poliomyelitis
