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WorksheetsWorksheet Questions Extraction
Total questions: 123
Worksheet time: 1hrs 2mins
The visual information from the eye is conducted to the brain with
optic nerve
auditory nerve
lacrimal duct
oculomotor nerve
Muller cells in the Retina are
neurons
photoreceptors
glial cells
endothelial cells
Brush’s membrane is a part of
retina
choroid
cornea
sclera
The laying epithelium of sclera is
stratified squamous nonkeratinized
simple cuboidal
stratified squamous keratinized
pseudostratified ciliated columnar
How does hydrocephalus manifest in terms of head size
normal head size
progressive enlargement of the head
microcephaly
intermittent shrinkage of the head
What is a neuroma, as mentioned in the text
a benign tumor of Schwann cells
a swelling formed by newly growing axons
a vascular malformation
a collection of scarred dendrites
What is the primary cause of most defects associated with neural tube development
excess folate intake
failure of fusion of neural arches
hyperplasia of the neurocranium
premature closure of cranial sutures
In severe cases of spina bifida, what additional structures may be involved
muscles only
spinal cord, meninges, and neurocranium
skin only
peripheral nerves only
What is the primary cause of hair loss leading to baldness or alopecia
chronic bacterial infection
vitamin C deficiency
genetic and hormonal factors
mechanical abrasion
What is acne vulgaris
autoimmune destruction of sweat glands
an allergic reaction to sunlight
a fungal infection of the hair shaft
an inflammatory disorder of the pilosebaceous unit
What is a common indicator of cystic fibrosis (CF) in infants
jaundiced sclerae
sweet-smelling breath
brittle nails
salty tasting skin
What is the genetic defect in CF patients that leads to disruptive accumulations of thick mucus in the respiratory and digestive tracts
mutation in the CFTR gene
trisomy 21
mutation in the HBB gene
deletion in the dystrophin gene
What medical conditions can adenomas involving somatotropic cells cause in adults
myxedema
acromegaly
Addison disease
Cushing disease
When can gigantism occur in individuals with adenomas involving somatotropic cells
before closure of epiphyseal plates
during menopause
only in the prenatal period
after closure of epiphyseal plates
What can adversely affect posterior pituitary function and lead to diabetes insipidus
heritable mutations in the vasopressin (ADH) or neurophysin gene
head trauma
pituitary tumors
elevated oxytocin secretion
What consequence can result from lowered levels of vasopressin due to adverse conditions
diabetes mellitus
syndrome of inappropriate antidiuretic hormone secretion (SIADH)
hyperthyroidism
diabetes insipidus
Which of the following neurons is found only in the cerebellar cortex
motor neurons of the anterior horn
pyramidal neurons
granule neurons
Purkinje neurons
Which cells form a barrier layer of expanded processes, called the glial limiting membrane
ependymal cells
astrocytes
microglia
oligodendrocytes
Point: 0.5 Which of the following cells is not derived from neural tube?
Oligodendrocyte
Ependymal cell
Astrocyte
Schwann cell
Point: 0.5 Development of nervous system begins:
During 5th week
During 3rd week
During 4th week
During 2nd week
Point: 0.5 The center of fovea centralis is abundant in:
Rod cells
Ganglion cells
Cone cells
Bipolar cells
Point: 0.5 What is the name of the structure in the ear that is responsible for detecting sound waves?
Semicircular canals
Cochlea
Eustachian tube
Vestibule
Point: 0.5 Which part of the ear is responsible for maintaining balance and spatial orientation?
Auditory system
Cochlear duct
Vestibular system
Tympanic membrane
Point: 0.5 What is the name of the fluid-filled structure in the inner ear that contains the sensory receptors for balance?
Saccule
Utricle
Cochlea
Semicircular canals
Point: 0.5 What is the name of the structure in the inner ear that contains the sensory receptors for hearing?
Vestibule
Scala vestibuli
Semicircular canals
Cochlea
Point: 0.5 What is the name of the fluid that fills the inner ear and helps to transmit sound waves?
Endolymph
Serous fluid
Perilymph
Cerebrospinal fluid
Point: 0.5 What is the name of the protein that makes up the majority of the extracellular matrix of the dermis?
Elastin
Collagen
Keratin
Fibronectin
Point: 0.5 Which of the following cells is responsible for phagocytizing pathogens and presenting antigens to the immune system in the skin?
Melanocyte
Langerhans cell
Keratinocyte
Merkel cell
Point: 0.5 What is the name of the layer of the epidermis that is made up of several layers of flattened, dead keratinocytes?
Stratum granulosum
Stratum corneum
Stratum spinosum
Stratum basale
Point: 0.5 Which of the following structures in the skin is responsible for detecting pressure and touch?
Meissner corpuscle
Pacinian corpuscle
Free nerve ending
Merkel cell
Point: 0.5 What is the name of the layer of the skin that is composed mainly of adipose tissue and serves as insulation and a source of energy storage?
Dermis
Epidermis
Hypodermis
Stratum lucidum
Point: 0.5 Which of the following layers of the skin contains blood vessels, nerves, and hair follicles?
Stratum granulosum
Hypodermis
Dermis
Epidermis
Point: 0.5 In which region is encephalocele most common?
Frontal
Temporal
Parietal
Occipital
Point: 0.5 What is meroencephaly?
Partial absence of the cerebellum
A severe defect of the calvaria and brain
Isolated cranial meningocele
Failure of posterior neuropore closure without brain defects
Point: 0.5 What is meroencephaly always associated with?
Anencephaly
Spina bifida occulta
Acrania (complete or partial absence of neurocranium)
Holoprosencephaly
Point: 0.5 What characterizes microcephaly?
Hydrocephalus with widened ventricles
Small calvaria and brain, but normal-sized face
Enlarged calvaria and brain with small face
Normal calvaria with reduced cerebellum only
Point: 0.5 In age-related macular degeneration, what part of the visual field is affected?
Lower visual quadrant
Center of the visual field
Upper visual quadrant
Peripheral visual field
Point: 0.5 What happens if the drainage of aqueous humor from the anterior chamber is impeded?
Decreased intraocular pressure
Immediate lens opacity
No change in intraocular pressure
Increased intraocular pressure
Point: 0.5 What symptoms are associated with angle closure glaucoma?
Double vision, ptosis, and facial numbness
Itching, burning, and watery discharge
Photophobia, tearing, and nasal congestion
Blurred vision, eye pain, and headache
Point: 0.5 What part of the eye is affected by untreated glaucoma, leading to possible neuropathy?
Cornea
Optic disc
Lens
Iris
Point: 0.5 What is the term for the condition where areas of the lens become opaque or cloudy, leading to impaired vision?
Cataract
Astigmatism
Presbyopia
Myopia
Point: 0.5 How is presbyopia commonly corrected?
Convex lenses
Contact lenses with blue filter
Cylindrical lenses
Concave lenses
Point: 0.5 What are common causes of cataract?
Genetic factors on the Y chromosome
Vitamin K deficiency
Chronic otitis media
Excessive exposure to ultraviolet light
Point: 0.5 What can cause the separation of the pigmented epithelium and the photoreceptor layer of the retina?
Optic neuritis
Retinal detachment
Uveitis
Corneal abrasion
Point: 0.5 What is the consequence of detached retina on photoreceptor cells?
Rapid regeneration due to increased blood supply
Eventual death due to lack of metabolic support
Immediate improvement in night vision
Reversible swelling with corticosteroids
Point: 0.5 What is the usual cause of partial color blindness?
Damage to the corneal endothelium
Dominant mutations in rod opsins
Vitamin C deficiency
Recessive mutations in genes for iodopsins
Point: 0.5 Why does red-green color blindness occur more frequently in men than women?
Environmental exposure unique to men
Higher melanin content in male retina
Hormonal differences affecting rods
Genetic factors on the X chromosome
Point: 0.5 Glial fibrillary acid protein (GFAP) serves as a unique marker for:
Oligodendrocytes
Astrocytes
Microglia
Schwann cells
Point: 0.5 What is the significance of two-point discrimination tests in detecting changes in tactile corpuscles?
They assess a person's ability to distinguish between two points of touch on the skin
They measure pain threshold on the cornea
They evaluate visual acuity under low light
They quantify olfactory sensitivity to mixed odors
Point: 0.5 Which part of the eye is responsible for converting light into neural signals that are sent to the brain?
Iris
Retina
Lens
Cornea
Point: 0.5 What is the name of the layer of the eye that contains blood vessels and nourishes the retina?
Choroid
Vitreous body
Sclera
Ciliary body
Point: 0.5 What types of tumors are produced from the basal layers?
Squamous cell carcinomas
Basal cell carcinomas
Kaposi sarcomas
Melanomas
Point: 0.5 In which regions is skin cancer more prevalent due to high amounts of solar radiation?
Polar regions
Areas near the equator
Urban industrial zones
High-altitude desert interiors only
Point: 0.5 Which of the following is a type of synapse?
Axodendritic
Axoaxonic
All of the above
Axosomatic
Point: 0.5 What is a common symptom of styes?
Profound hearing loss
Painless enlargement of the iris
Redness and pain near the tarsal gland ducts
Sudden complete vision loss
Point: 0.5 What term is commonly used to describe pain in the ear?
Otorrhea
Otalgia
Otitis
Otomycosis
Point: 0.5 What degenerative changes in the retina around the macula contribute to age-related macular degeneration?
Acute inflammation of the tarsal glands with pus formation
Thickening of the corneal stroma and increased tear production
Hypertrophy of extraocular muscles with reduced perfusion
Accumulation of drusen and degeneration of the retinal pigment epithelium
What facilitates the infection of the tympanic cavity in young children?
Short auditory tubes
Thickened tympanic membrane
Narrow external auditory canals
Underdeveloped ossicles
What is vertigo characterized by?
Pain localized to the auricle
A sense of bodily rotation and lack of equilibrium with the sensation that you or the room is moving or spinning
Transient hearing improvement after rest
Persistent ear fullness without motion illusion
Which specific part of the semicircular ducts is overstimulated during spinning of the body, leading to vertigo?
Organ of Corti
Cupula of the cochlea
Maculae of the utricle
Cristae ampullares
Which condition involves episodes of vertigo accompanied by hearing loss and ringing in the ears (tinnitus)?
Acoustic neuroma
Otitis externa
Ménière disease
Presbycusis
What is a cause of Ménière disease?
Degeneration of the organ of Corti with age
Overproduction or decreased absorption of endolymph causing increased pressure within the membranous labyrinth
Inflammation of the external acoustic meatus
Fixation of the stapes at the oval window
What may be examples of benign paroxysmal positional vertigo (BPPV)?
Continuous exposure to loud noise
Prolonged bed rest without head movement
Middle ear infection
Sudden changes in the position of the head
How does BPPV occur?
Inflammation of the semicircular canal epithelium
Detachment of dense otoliths (otoconia) from the otolithic membrane
Rupture of the tympanic membrane
Hyperplasia of hair cells in the cochlea
Functions of ependymal cells are:
Myelination of peripheral nerves
Lining of brain ventricles
Secretion of cerebrospinal fluid
Phagocytosis of pathogens in meninges
Cerebral nuclei represent:
Bundles of axons in peripheral nerves
Bundles of cell bodies inside the central nervous system, i.e., groups of neuron bodies inside white matter
Clusters of glial cells in the cortex
Sensory ganglia outside the spinal cord
The dorsal horn is made of:
Motor neurons
Ependymal cells
Interneurons
Schwann cells
Which of the following is not a primary brain vesicle?
Metencephalon
Prosencephalon
Mesencephalon
Rhombencephalon
Lateral ventricles communicate with the third ventricle through:
Foramina of Luschka
Foramina of Monro
Foramina of Magendie
Aqueduct of Sylvius
Ventral motor neuron cells are derived from:
Roof plate
Basal plate
Neural crest
Alar plate
What can be a contributing factor to microcephaly during the fetal period?
Adequate prenatal care
Exposure to large amounts of ionizing radiation
Maternal folate supplementation
Physiologic closure of fontanelles
What is the term for hydrocephalus in which the ventricular system is enlarged due to blockage of the apertures or subarachnoid spaces?
Noncommunicating hydrocephalus
Normal-pressure hydrocephalus
Ex vacuo hydrocephalus
Communicating hydrocephalus
Which gene is mentioned as a contributor to holoprosencephaly in molecular studies?
PAX6
SHH (Sonic Hedgehog)
FGF8
HOXA1
The hair growth cycle has three major phases: anagen, ________, and telogen. Which term correctly fills the blank?
Matrix
Lanugo
Exogen
Catagen
The color of the skin is determined by the number of which elements?
Melanocytes only
Hemoglobin in dermal vessels only
All of them
Carotene deposits only
The pigment which is only in red hair is:
Eumelanin
Neuromelanin
Pheomelanin
Melatonin
Antigen-presenting Langerhans cells are usually most clearly seen in the:
Stratum spinosum
Stratum corneum
Stratum basale
Dermal papillae
Langerhans cells are derived from:
Keratinocyte stem cells
Melanocytes
Fibroblasts
Monocytes
The epidermis consists mainly of:
Pseudostratified columnar epithelium
Stratified squamous keratinized epithelium
Transitional epithelium
Simple squamous epithelium
The richly innervated skin layer is:
Stratum corneum
Hypodermis
Dermis
Epidermis
The encapsulated receptors are all of the following, except:
Meissner corpuscles
Pacinian corpuscles
Ruffini endings
Free nerve endings
Melanocytes are derived from:
Basal plate
Mesoderm of the dermis
Neural crest
Epidermal stem cells
The myelencephalon gives rise to the:
Pons
Cerebellum
Medulla oblongata
Midbrain
Basal plate cells form the ventral root of the spinal nerve, which contains:
Interneurons
Autonomic ganglia
Motor neurons
Sensory neurons
Pons and cerebellum are derived from the:
Myelencephalon
Metencephalon
Diencephalon
Mesencephalon
Which of the following does not belong to brain stem?
Medulla oblongata
Midbrain
Telencephalon
Pons
The lateral cutaneous nerve of the forearm is derived from the:
C5, 6
C7, 8
C5, 6, 7
C6 only
Muscles innervated by the musculocutaneous nerve:
Brachialis only
All of the above
Coracobrachialis only
Biceps brachii only
Regarding the median nerve, all are correct EXCEPT:
In the cubital fossa, it lies lateral to the brachial artery
It gives the anterior interosseous nerve
It supplies thenar muscles
It passes through the carpal tunnel
The median nerve supplies all of the following muscles EXCEPT:
Flexor carpi ulnaris
Thenar muscles
Flexor digitorum superficialis
Pronator teres
The structure responsible for focusing light onto the retina is the:
Cornea
Lens
Iris
Ciliary body
The cranial nerve responsible for controlling the muscles that move the eyeball downward and laterally is
Trochlear nerve
Abducens nerve
Oculomotor nerve
Optic nerve
The region of the retina that contains the highest concentration of cones, responsible for color vision, is the:
Peripheral retina
Fovea centralis
Macula lutea
Optic disc
Which four structures together make up the brain?
Cortex, thalamus, hippocampus, cerebellum
Cerebrum, diencephalon, brainstem, cerebellum
Cerebrum, medulla, cerebellum, spinal cord
Forebrain, midbrain, hindbrain, spinal cord
How many major compartments does the neck have?
3
5
4
2
What causes functional defects in Alzheimer’s disease?
Loss of acetylcholine exclusively
Accumulations of tau protein
Autoimmune attack on neurons
Beta-amyloid accumulation only
What is the primary cause of myelin sheath damage in multiple sclerosis (MS)?
Viral infection of oligodendrocytes
Nutritional deficiency
Genetic absence of myelin
Autoimmune mechanism
Which of the compartments of the neck contains vagus nerve?
Visceral compartment
Prevertebral compartment
Retropharyngeal space
Carotid sheath
Fontanelles are:
Sutures along the temporal bone
Fibrous gaps between cranial bones in infants
Anterior bones of the skull
Spaces in the nasal cavity
Which cranial nerve carries parasympathetic fibers responsible for tear production and salivation?
Glossopharyngeal nerve
Facial nerve
Vagus nerve
Trigeminal nerve
The main artery supplying the face and scalp is the:
Internal carotid artery
Vertebral artery
External carotid artery
Basilar artery
Which of the following muscles is responsible for elevating the mandible during biting and chewing?
Masseter muscle
Lateral pterygoid muscle
Temporalis muscle
Medial pterygoid muscle
What immune cells are involved in the autoimmune mechanism of multiple sclerosis?
Microglia
B lymphocytes
T lymphocytes
Neutrophils
The parotid gland, a major salivary gland, is innervated by which cranial nerve?
Glossopharyngeal nerve
Facial nerve
Vagus nerve
Hypoglossal nerve
The muscle responsible for protrusion of the tongue is the:
Hyoglossus muscle
Genioglossus muscle
Palatoglossus muscle
Styloglossus muscle
Which cranial nerve is responsible for innervating the muscles of the soft palate and pharynx?
Glossopharyngeal nerve
Trigeminal nerve
Hypoglossal nerve
Vagus nerve
What is the name of the specialized junction between two neurons?
Axon hillock
Node of Ranvier
Dendritic spine
Synapse
What is the name of the part of a neuron that receives signals from other neurons?
Axon
Dendrite
Myelin sheath
Axon terminal
What is the name of the cell that forms the myelin sheath around axons in the peripheral nervous system?
Microglia
Schwann cell
Astrocyte
Oligodendrocyte
What is the name of the structure of the eye that is responsible for focusing light onto the retina?
Sclera
Lens
Iris
Cornea
Nissl substance is located in which part of a neuron?
Axon
Myelin sheath
Synaptic cleft
Soma
Which type of cell in the retina is responsible for detecting low levels of light?
Cone cell
Rod cell
Ganglion cell
Bipolar cell
What is the name of the transparent gel that fills the back part of the eye?
Aqueous humor
Vitreous humor
Tears
Choroid
Which of the following glial cells is not found in the central nervous system?
Oligodendrocyte
Schwann cell
Microglia
Astrocyte
Which of the following neural cells are the functional unit of the central nervous system?
Microglia
Neuron
Astrocyte
Ependymal cell
Nerve signal can be transmitted to all of the following tissues, except which one?
Bone
Neuron
Gland
Muscle
What is the name of the large, multipolar neurons that make up the gray matter of the brain?
Interneurons
Pyramidal cells
Granule cells
Purkinje cells
Which of the following is not a function of astrocytes?
Maintain blood–brain barrier
Produce myelin
Provide metabolic support
Regulate extracellular ions
Why are Merkel cell carcinomas considered of clinical importance?
They are resistant to chemotherapy
They are always benign
They often regress spontaneously
They are easily diagnosed early
What is the consequence of abnormalities in the dermal–epidermal junction?
Alopecia
Bullous pemphigoid
Vitiligo
Psoriasis
Which germ layer gives rise to the nervous system in embryonic development?
Mesoderm
Ectoderm
Neural crest
Endoderm
Which of the following structures is responsible for the production of cerebrospinal fluid?
Pineal gland
Dural venous sinuses
Choroid plexus
Pituitary gland
Which type of cell in the retina is responsible for detecting color and fine detail?
Rods
Cones
Ganglion cells
Horizontal cells
