3rd sem zoology Question paper (Animal physiology-controlling and coordinating system)c-6,under CBCS dibru .G.Uni.2022

 3rd sem zoology Question paper (Animal physiology-controlling and coordinating system)c-6,under CBCS dibru .G.Uni.2022

2. Distinguish between the following (any two):

3x2=6

(a) Simple squamous and brush-bordered

ciliated cuboidal epithelium

(b) Cartilage and bone

(c) Isotonic

and

isometric

muscle

3. Write illustrative notes on the following

(any two) :

contractions

3x2=6

(a) Histology of pituitary gland

(b) Neurotransmitter

(c) Placental hormone

(d) Function of somatotropic hormone

4. Write short notes on the following (any two):

4½x2=9

(a) Ultrastructure of seminiferous tubule

(b) Oogenesis

(c) Menstrual cycle

(d) Thyroxine hormone

5. What is neuron? Describe the propagation of action potential along the myelinated and non-myelinated nerve fibres.

What is reflex action? Discuss about its types.

1-8-9

6. Describe the ultrastructure of skeletal muscle with illustrative diagram.

6+3=9

Or

Explain the chemical basis of muscle contraction.

7. What do you mean by signal transduction? Describe the mechanism of action of steroidal and non-steroidal hormones. 2+7-9

Or

Describe the structure and functions of neuromuscular junction. Compare between cardiac and smooth muscle fibres.

ltk college