Each seminiferous tubule is lined on its inside by:

1. Spermatogonia

2. Primary spermatocytes

3. Sertoli cells

4. Both 1 and 3

Leydig cells:

1. Are present in seminiferous tubules and secrete androgens

2. Are present in seminiferous tubules and help in maturation of sperms

3. Are present in interstitial space and secrete androgens

4. Are present in interstitial space and help in maturation of sperms

What causes the onset the puberty in males?

1. Increase in secretion of testosterone by testis

2. Decrease in secretion of testosterone by testis

3. Increase in secretion of GnRH by hypothalamus

4. Decrease in secretion of GnRH by hypothalamus

Which of the following is characteristic for identifying the structure of the mammalian testis?

In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to

Identify the correct statement on ‘inhibin'

Which of the following cells during gametogenesis is normally diploid?

1. Primary polar body

2. Spermatid

3. Spermatogonia

4. Secondary polar body

The Leydig cells as found in the human body are the secretory source of

1. progesterone

2. intestinal mucus

3. glucagon

4. androgens

Sertoli cells are found in

1. ovaries and secrete progesterone

2. adrenal cortex and secrete adrenalin

3. seminiferous tubules and provide nutrition to germ cells

4. pancreas and secrete cholecystokinin

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is