ZOO/IV/EC/07 Student's Copy
2 0 1 8
CBCS
4th Semester
ZOOLOGY
FOURTH PAPER
Endocrinology and Reproduction Biology
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. Which of the following pairs of organs are exclusively endocrine glands?
Thymus and testis
Ovaries and adrenal
Pancreas and parathyroid
Adrenal and parathyroid
2. Which of the following hormones are released from the posterior lobe of
pituitary glands?
ADH and GH
ACTH and TH
ADH and oxytocin
TRH and CRH
/343 1 Contd.
3. Cyclic AMP is best matched with
steroid hormones
protein hormones
muscle cells
male hormones
4. The function of adenyl cyclase is to
break down a protein hormone when it binds to its
receptor
turn on a G-protein
cause the conversion of ATP to cAMP
activate a protein kinase and inactivate cAMP
5. The blood calcium level is lowered by the deficiency of
thyroxine
calcitonin
parathormone
Both and
6. The endocrine gland responsible for the body's circadian rhythm is the
thymus gland
pineal gland
parathyroid gland
pituitary gland
7. What happens during spermatogenesis?
Mitosis
Meiosis
Mitosis and meiosis
None of the above
8. Spermatogenesis is induced by
MSH
TSH
FSH
ACTH
ZOO/IV/EC/07/343 2 Contd.
9. First menstrual cycle is called
menopause
implantation
parturition
menarche
10. Contraceptive pills do not
engulf the sperm
alter the quality of cervical mucus
prevent the entry of sperm
inhibit implantation
SECTION—B
Marks 15
Write short notes on the following 3×5=15
1. Gigantism
OR
Pancreatic hormones
2. G-protein coupled receptor
OR
Insulin receptor
3. Parturition
OR
Calcium homeostasis
4. Structure of spermatozoa
OR
Structure of ovum
ZOO/IV/EC/07/343 3 Contd.
5. Contraceptive pills
OR
Follicular phase of menstrual cycle
PART B—DESCRIPTIVE
Marks 50
The figures in the margin indicate full marks for the questions
1. Describe the structure and hormones of thyroid gland. Add notes on their
functions. 5+5=10
OR
Write notes on diabetes mellitus and dwarfism. 5+5=10
2. Explain the mechanism of action of peptide hormones. 10
OR
Describe the mechanism of action of steroid hormones.
3. Describe biological rhythms and their hormonal regulations. 10
OR
Explain the hormonal regulation of glucose homeostasis.
4. Write a detailed note on the process of oogenesis and its hormonal
regulation. 5+5=10
OR
What are pheromones? Discuss their nature and biological effects. 2+8=10
5. Discuss the different phases of estrous cycle and their hormonal
regulations. 10
OR
Give detailed notes on the nature, uses and effects of anabolic steroids.