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2014
Zoology( Major)
Paper: 5.1
(Animal Physiology)
Full Marks : 60
Time : 3 hours
1. Answer any seven questions from the following : 1x7=7
(a) What is Bohr effect?
(b) Define diastolic blood pressure.
(c) What is nodes of Ranvier? How does it link to saltatory conduction?
(d) What is heparin?
(e) Name the major organ of human body where detoxification of toxic substances takes place.
(f) State the function of the hormone ‘Vasopressin’.
(g) Mention the function(s) of Kupffer cell.
(h) Mention the name of the cell type that secretes HCl in stomach.
(i) What type of cell of islets of Langerhans does secrete glucagon hormone?
(j) What type of major nitrogenous product is excreted by birds?
2. Answer any four questions from the following : 2x4=8
(a) Differentiate between myogenic and neurogenic heart.
(b) Differentiate between troponin and tropomyosin.
(c) Differentiate between insulin and glucagon.
(d) Differentiate between synaptic transmission through myelinated and non-myelinated nerve fibres.
(e) Differentiate between open circulation and closed circulation.
(f Differentiate between euryhaline and stenohaline.
(g) What do you understand by all or none response of a nerve fibre?
(h) Mention the role of secretin in digestion process.
3. Answer any three questions from the following : 5x3=15
(a) Briefly describe the role of bile in intestinal digestion process. 5
(b) Is there any role of aldosterone in urine formation? Justify your opinion. 5
(c) Briefly describe the causes. of hypertension. 5
(d) Define osmoregulation. Explain how freshwater and marine teleosts maintain salt and water. 1+4=5
(e) How does glucose absorb in the gastrointestinal tract? 3
(f) Give an account of the structure and function of myosin. 5
4. Define nerve impulse. Write the significance of acetylcholinesterase in synaptic transmission. Describe the propagation of nerve impulse in a non-myelinated fibre. 1+2+7=10
Or
What is Malpighian corpuscle? Discuss the role of different segments of loop of Henle in urine formation. 2+8=10
5. How does oxygen bind to respiratory pigment? What factors facilitate the formation of oxyhaemoglobin in lungs and dissociation of oxyhaemoglobin in tissues? What do you understand by ‘chloride shift’? 2+5+3=10
Or
What is cardiac cycle? Discuss different physiological events in the heart during a complete cardiac cycle. 2+8=10
6. Describe in detail about digestion and absorption of fats in the intestine. 5+5=10
Or
Give an account of extrinsic and intrinsic pathway of blood clotting mechanism. 4+6=10