University of Delhi 2006 B.Sc Zoology .(hons) - V - Question Paper

Zoology -v

Physiology and Physiological Chemistry

Time-3 hours Maximum Marks: 55


Attempt 5 ques. in all, including
ques. No.1, which is compulsory.

1. (a) describe the following:

i. Isoelectric point
ii. Michaelis contant. [Marks 2]

(b) Mention the site of production of the following:

i.Oxytocin
ii.Aldosterone
iii.Renin [Marks 3]

(c ) Fill in the blanks :

(i) ………… is a condition of decreased blood
Supply to organ.
(ii).An isotonic contraction is likely to last con-
Siderably ………..than an isometric con-
traction of than identical muscle
(iii ) serum differ from blood plasma because it
lack ……….. [Marks 3]


(d) Indicate whether actual or false: (i) Stimulation of vagus nerve reduce the heart rate. (ii) Apnoea is the state in which respiration is temporarily suspended . (iii) Presbyopia is the impairment in vision resulting from stiffening of the lens, which make accommodation difficult. [Marks 3]


(e) Expand the subsequent (i) HCG (ii) EPP (iii) DOPA (iv) HMG-COA [Marks 2]

(f) provide the structural formulae of subsequent : i. Tryptophan
ii. Activated glucose. [Marks 2]




(g) Distinguish ranging from the following:
i.Haemostasis and Homeostasis
ii. Substrate level phosphorylation and oxidative phosphylation. [Marks 4]



2. (a) explain the process of digestion and absorption of proteins in the GI tract. [Marks 6]


(b)Explain the role of vitamins B in transamination. [Marks 3]

6

3. (a) explain the hexose monophosphate shunt and explain its importance. [Marks 5]


(b) discuss the biosynthesis and utilization of ketone bodies. [Marks 4]


4. (a) Write an account of the tubular reabsorption of glucose, water and inorganic salts. [Marks 6]


(b) Enumerate the hormones secreted by the anterior pituitary gland and explain their functions. [Marks 3]


5. (a) Enumerate factors involved in blood coagulation and define the intrinsic pathway of blood coagulation diagrammatically.
[Marks 6]


(b) discuss the Hering-Breuer reflex with the help of a diagram. [Marks 3]


6. (a) define the origin and propagation of the heart beat. [Marks 6]


(b) describe synapse. How does it differ from myoneural junction? [Marks 3]


7. Write short note on any 3 of the following: [Marks 9]


i. Structure and function of the retina
ii. Endometrial cycle
iii. Vitamins as coenzymes
iv. Thermal regulation

Earning:   Approval pending.