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WorksheetsBiology Unit-9 Test
Total questions: 40
Worksheet time: 3600secs
All of the following are functions of endoskeleton in humans except:
Protection to critical internal organs
Mineral homeostasis
Blood cell production
Thermoregulation
It is the most rigid form of connective tissue found in humans:
Bone
Tendon
Cartilage
Thermoregulation
All of the following are the features of spongy bone except:
Light in weight
Rich blood supply
Provides attachment sites for muscles
Highly porous
A flexible, elastic, non-living matrix called collagen is secreted by ______________ during cartilage tissue formation.
Stem cells
Osteoblasts
Chondrocytes
Osteocytes
All of the following functions are performed by the cartilage except:
Attachment of muscles with bones
Covers ends of bones in joints
Formation of external pinnae of ear
Covers glottis during swallowing
Total number of cervical and thoracic vertebrae in human vertebral column is:
7
14
19
33
These cells are equipped with phagocytic-like mechanism and involved in bone resorption and breakdown processes:
Osteocytes
Osteogenic cells
Osteoclasts
Osteoblasts
Cranium is made up of:
2 paired and 4 unpaired bones
2 unpaired and 4 paired
2 paired and 2 unpaired
4 paired and 4 unpaired
Axial skeleton includes all except:
Skull
Sternum
Clavicle
Ribs
Lacrimal bone is:
Paired bone of cranium
Paired bone of face
Unpaired bone of cranium
Unpaired bone of face
Vertebral column starts with which vertebra:
Axis
Thoracic
Sacral
Atlas
It is the chest bone in axial skeleton of human body:
Hyoid
Sternum
Maxilla
Ribs
Number of bones in appendicular skeleton are:
126
80
206
30
In children, rickets is characterized by all except:
Bowed legs
Excess calcium in body
Deformed pelvis
Deficiency of vitamin ‘D’
Non-polarizing region of sarcomere is called:
I-band
A-band
M-line
H-zone
Color of red fibers of muscles is due to the presence of:
Glycogen
Hemoglobin
Oxyhemoglobin
Myoglobin
These muscles are irregularly striped and involuntary:
Skeletal muscles
Gut smooth muscles
Cardiac muscles
Vascular smooth muscles
Stimulation of a muscle fibre by a motor neuron occurs at:
Neuromuscular junction
Myofibril
Transverse tubules
Sarcoplasmic reticulum
Complete immobilization of muscle leads to:
Muscle atrophy
Muscle hyperplasia
Muscle hypertrophy
Muscle tetany
After death, the body becomes stiff due to deficit of ATP. This condition is called:
Spasm
Rigor mortis
Tetanus
Spastic paralysis
Origin of skeletal muscle is attached to:
Immoveable bone through tendon
Immoveable bone through ligament
Moveable bone through tendon
Moveable bone through ligament
With the routine exercise, all of the following changes occur in skeletal muscle except:
Increase in number of mitochondria
Increase in number of muscle fibers
Increase in myoglobin
Increase in blood capillaries
Function of the skeletal muscles is:
Moves the skeleton
Pumps blood
Vasodilation
Propel food through GIT
The hydrolysis of the ATP that is bound to myosin causes
Release of myosin head from actin filament
Reversible binding of actin filament
Phosphorylation of actin filament
Irreversible binding of actin filament
Sarcomeres are the part of:
Myofibrils
Thick filaments
Thin filaments
Actin molecules
When a sarcomere contracts, then all of the following can occur except:
I-band shortens
A-band shortens
Z-lines come closer
H-zone disappears
T-tubule is the part of:
Myofibril
Neuron
Endoplasmic reticulum
Sarcolemma
Energy for muscles contraction comes from ATP. The supply of ATP is normally maintained by:
Glucose
Glycogen
Starch
Creatine phosphate
Four curvatures in vertebral column are helpful in providing:
More protection to spinal cord
More strength
Attachment site for limbs
More CSF production
The H-zone in the skeletal muscles fibre is due to:
The absence of myofibrils in the central portion of A-band
The central gap between actin filaments extending through myosin filaments in the A-band
The central gap between myosin filaments in the A-band
Extension of myosin filaments in the central portion of the A-band
Which of the following is correctly matched?
A
B
C
D
Which one of the following causes growth and development of germinal epithelium of the testes?
Inhibin
LH
Testosterone
FSH
Production of slightly acidic fluid with citrate as a main nutrient source is the function of:
Bulbourethral gland
Prostate gland
Seminal vesicles
Cowper’s gland
Prior to emission and ejaculation, spermatozoa are stored in:
Urethra
Seminal vesicles
Epididymis
Prostate gland
Correct sequence of events in spermatogenesis is:
Spermatogonia > Spermatids > Spermatocytes > Spermatozoa
Spermatogonia>Primary spermatocyte > Secondary spermatocytes>Spermatid> Spermatozoa
Primary spermatocytes > Secondary spermatocytes > Spermatozoa
Secondary spermatocyte > Spermatozoa > Spermatogonia> Spermatids
Main function performed by bulbourethral gland in humans is/are:
Sperm maturation
Neutralization of urethra
Sperm production
Semen formation
Oogenesis in human females start:
At puberty
Before birth
Before puberty
After puberty
Fertilization of a secondary oocyte by sperm takes place at:
Proximal part of cervix
Distal part of oviduct
Proximal part of uterine tube
Distal part of cervix
Uterus opens into vagina through a narrow entrance that is:
Cervix
Birth canal
Fallopian tube
Uterine body
How many spermatozoa and ova are produced from 50 primary spermatocytes and 50 primary oocytes?
200 spermatozoa and 100 ova
200 spermatozoa and 50 ova
100 spermatozoa and 50 ova
100 spermatozoa and 100 ova
