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
The structure of testis of a mammal can be identified by the presence of
(1) Spermatogonia
(2) Spermatocytes
(3) Cells of Sertoli
(4) Spermatids
In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to
(1) Interstitial cells
(2) Sperm-mother cells
(3) Spermatocytes
(4) Sertoli cells
Identify the correct statement on ‘inhibin'
1. Is produced by granulosa cells in ovary and inhibits the secretion of FSH
2. Is produced by granulosa cells in ovary and inhibits the secretion of LH
3. Is produced by nurse cells in testes and inhibits the secretion of LH
4. Inhibits the secretion of LH, FSH and prolactin
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
1. spermatocyte - spermatogonia - spermatid - sperms
2. spermatogonia - spermatocyte - spermatid -sperms
3. spermatid-spermatocyte-spermatogonia -sperms
4. spermatogonia-spermatid-spermatocyte -sperms