ZOO/V/CC/11 Student's Copy
2 0 1 8
CBCS
5th Semester
ZOOLOGY
SIXTH PAPER
Physiology
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. The secretions of stomach cells for digestion are
chief cell mucus, parietal cell HCl, mucus cell
bicarbonate
chief cell pepsinogen, parietal cell HCl, mucus cell
mucus
chief cell HCl, parietal cell pepsinogen, mucus cell
mucus
chief cell HCl, parietal cell pepsinogen, pancreatic cell
amylase
/139 1 Contd.
2. The volume of air breathed in and out during normal breathing is called
vital capacity lung capacity
inspiratory reserve volume tidal volume
3. The heart sound 'lup and dupp' is produced by the
opening of AV valves and semilunar valves respectively
opening of AV valves and closing of semilunar valves
respectively
closing of AV valves and opening of semilunar valves
respectively
closing of AV valves and semilunar valves respectively
4. The blood vessels which carry only oxygeneted blood are
pulmonary veins pulmonary arteries
aortas capillaries
5. Excitation of stretch receptors occurs when about of urine
accumulate in urinary bladder.
250 ml 350 ml
400 ml 300 ml
6. Marine reptiles and marine birds are unable to produce urine, they are
endowed with cranial organs specialized for the secretion of salts in
a strong hyperosmotic fluid. These organs are called
rectal glands osmoregulatory glands
salt glands extrarenal glands
7. Skeletal muscle is covered by connective tissue coverings from entire
muscle, bundle of muscle fibres and individual muscle fibre in which of
the following orders?
Epimysium, endomysium, perimysium
Endomysium, epimysium, perimysium
Epimysium, perimysium, endomysium
Epimysium, mesomysium, endomysium
ZOO/V/CC/11/139 2 Contd.
8. The entire array of thick and thin filaments between two Z lines is called a
sarcolemma sarcomere
sarcoplasm sarcomembrane
9. Propagation of nerve impulse is faster in saltatory conduction than
continuous conduction, because action potential jumps from node to node
due to
presence of myelin sheath
absence of myelin sheath
presence of long axon
presence of large axon
10. The ion movement across membrane during action potential occurs by
spike potential simple diffusion
active transport facilitated diffusion
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Types of respiration
OR
Intracellular and extracellular respirations
2. Pacemaker
OR
Open and closed circulations
3. Types of nitrogenous wastes
OR
Functions of kidney
4. Isotonic and isometric contractions
OR
Ultrastructure of smooth muscle
5. Resting and action potentials
OR
Synaptic transmissions

PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. Describe in detail the mechanism and absorption of carbohydrates. 10
OR
What do you mean by respiration? Explain the mechanism of gill
respiration. 3+7=10
2. Write an account on the sequence of events during blood coagulation. 10
OR
Write an account on the structure and function of haemoglobin. 5+5=10
3. Illustrate the structure of kidney. Write an account of physiology of urine
formation. 2+8=10
OR
Define osmoregulation. Write the mechanism of osmoregulation in
terrestrial vertebrates. 2+8=10
4. What are the different types of muscles? Write an account on muscle
proteins. 2+8=10
OR
What do you mean by muscle fatigue and tetanic contraction? Describe the
mechanism of muscle contraction. 2+8=10
5. Describe an ultrastructure of a typical neuron. 10
OR
What are excitatory and inhibitory neurotransmitters? Write an account
on major neurotransmitters. 2+8=10