Which one of the following hormones is responsible for uterine contraction during parturition?

• Relaxin

• Vasopressin

• Oxytocin

• Prolactin

During entry into the ovum, acrosome of sperm releases

• hyaluronidase

• alkaline phosphorylase

• acid phosphatase

• carbonic anhydrase

Indicate the correct sequence during spermatogenesis.

• Spermatozoa $\to$ spermatogonia $\to$ spermatid  $\to$spermatocyte

• Spermatogonia $\to$ spermatocyte $\to$ spermatid $\to$ spermatozoa

• Spermatid $\to$ spermatocyte $\to$ spermatozoa  $\to$spermatogonia

• Spermatocyte $\to$ spermatozoa $\to$ spermatid  $\to$spermatogonia

144.

Egg in female gametophyte is accompanied by

• antipodal cells

• synergids

• definitive nucleus

• tube nucleus

During fertilisation, zona pellucida is dissolved by

• hyaluronidase

• hyaluronic acid

• renin

• acrosin

Study the following with regard to spermatogenesis.

I. Spermatogonia

II. Secondary spermatocyte

III. Spermatogonial stem cells

IV. Primary spermatocyte

V. Spermatid

Arrange them in the correct sequence.

• III, IV, II, I, V

• III, I, IV, II, V

• I, II, III, IV, V

• III, IV, I, II, V

The phase involved in the process of spermateliosis is

• Multiplication phase

• Growth phase

• Maturation phase

• Differentiation phase

Cryptorchidism in males is

• male sterility due to prostate

• enlargement of prostate gland

• inguinal hernea

• hidden testis

Where does hyaline cartilage occur in an embryo?

• Entire skeleton of the embryo

• surface of bones at joints

• pinna of the outer ear and in epiglottis

• intervertebral discs of the spinal column

Menstrual cycle is the cyclic changes in the reproductive tract of primate females. Given below are some statements related with menstrual cycle.

I. Oestrogen is the hormone active during proliferative phase.

II. The uterine endometrium and glands grow further during secretory phase.

III. At the end of proliferative phase, corpus luteum degenerates in the ovary.

IV. The cycle ends with the menstrual phase, when menstrual flow occurs and lasts for 3-5 days.

Choose the correct option.

• I, II and III

• II, III and IV

• I and II

• III and IV