Hormonal Regulation of Spermatogenesis

Q.

Name the hormones involved in regulation of spermatogenesis.

Q. The hormones responsible for milk production and milk ejection, respectively are______.

1. oxytocin and prolactin
2. prolactin and estrogen
3. prolactin and oxytocin
4. estrogen and prolactin

Q.

Name the hormones involved in regulation of spermatogenesis.

Q. Which of the following statements is correct regarding menstrual cycle?

1. LH induces rupturing of Graafian follicle
2. Proliferative phase is characterized by the increased production of progesterone
3. Corpus luteum secretes large amount of estrogen
4. Both LH and FSH attain a peak level in secretory phase

Q.

Parathormone is also called

1. Collips hormone

2. Phillips hormone

3. Collins hormone

4. None of these

Q. Increased secretion of which hormone starts the process of sperm formation at the time of puberty?

1. GH
   
2. TSH
3. PRL
4. GnRH

Q. Select the incorrect statement with respect to human beings.

1. Cytoplasm is more abundant in egg than in sperm.
2. Spermatogenesis starts at puberty whereas oogenesis begins in foetal life.
3. Ovum is motile and sperm is non-motile.
4. Mitochondria are present in the middle piece of sperm

Q. Assertion: The space between the seminiferous tubules is occupied by Sertoli cells.​

Reason: Sertoli cells secrete testosterone hormones.​

Q.

Which hormone triggers spermatogenesis?

Q.

Give a suitable word for each of the following statements.

(a) The site which responds to a hormone.

(b) Name of a gland which transports secretions through ducts.

(c) Chemicals which control changes at the adolescence stage.

(d) It marks the beginning of the reproductive period.

Q. What is the size of THYMUS GLAND ON BIRTH AND PUBERTY AND IN OLD AGE.

Q. At which stage of spermatogenesis does acrosome formation take place?

Q. Hormone which controls spermatogenesis is

1. FSH
2. LH
3. LTH
4. Vasopressin

Q. Hormone responsible for spermatogenesis is

1. Androgen
2. Progesterone
3. Testosterone
4. None of these

Q.

The blood testosterone concentration is increased by

1. LH stimulating interstitial cells to release testosterone

2. High level of testosterone stimulating the testes to release more LH

3. High level of testosterone stimulating the hypothalamus

4. Hypothalamus stimulating the testes to release LH

Q. Explain the hormonal regulation of the process of spermatogenesis in humans.

Q. Choose the incorrect statement with respect to the process of capacitation.

1. It occurs so that spermatozoa becomes motile and fully functional.
2. It takes place in the female reproductive tract.
3. Spermatozoa become motile when they are mixed with secretions of the seminiferous tubules
4. Sperms become capable of successful fertilisation when exposed to conditions in the female reproductive tract

Q.

Fill in the blank with suitable term:

In between seminiferous tubules are present ________ cells.

Q.

The gonadotropin releasing hormone (GnRH) released by the _____(i)_____stimulates the ___(ii)______ to release ___(iii)______ and _____(iv)______. The _____(iii)____ stimulates the leydig cells to produce____(v)______. The ____(iv)___ stimulates the sertoli cells to secrete substances important for sperm development.

1. (i) hypothalamus (ii) pituitary (iii) LH (iv) FSH (v) testosterone

2. (i) hypothalamus (ii) pituitary (iii) FSH (iv) estrogen (v) testosterone

3. (i) hypothalamus (ii) pituitary (iii) LH (iv) testosterone (v) FSH

4. (i) pituitary (ii) hypothalamus (iii) LH (iv) FSH (v) testosterone

Q. Select the incorrect statement with respect to human beings.

1. Ovum is motile and sperm is non-motile.
2. Cytoplasm is more abundant in egg than in sperm.
3. Mitochondria are present in the middle piece of sperm
4. Spermatogenesis starts at puberty whereas oogenesis begins in foetal life.

Q.

What exactly does Spermiogenesis involve?

Q.

Name the hormone responsible for the following function

(viii) Regulate the functioning of the male and female reproductive organ.

Q. Write a brief note on hormonal regulation of spermatogenesis.

Q. Interstitial cells produce testosterone.

1. True
2. False

Q. Select the incorrect statement with respect to human beings.

1. Spermatogenesis starts at puberty whereas oogenesis begins in foetal life.
2. Cytoplasm is more abundant in egg than in sperm.
3. Mitochondria are present in the middle piece of sperm
4. Ovum is motile and sperm is non-motile.

Q.

Growth hormone is secreted by

1. Pars tuberalis

2. Pars nervosa

3. Pars distalis

4. Pars intermedia

Q.

The gonadotropin releasing hormone (GnRH) released by the _____(i)_____stimulates the ___(ii)______ to release ___(iii)______ and _____(iv)______. The _____(iii)____ stimulates the leydig cells to produce____(v)______. The ____(iv)___ stimulates the sertoli cells to secrete substances important for sperm development.

1. (i) Hypothalamus (ii) Pituitary (iii) LH (iv) FSH (v) Testosterone

2. (i) Hypothalamus (ii) Pituitary (iii) FSH (iv) LH (v) Testosterone

3. (i) Pituitary (ii) Hypothalamus (iii) LH (iv) FSH (v) Testosterone

4. (i) Hypothalamus (ii) Pituitary (iii) LH (iv) Testosterone (v) FSH

Q. How the FSH controls the spermatogenesis?

1. By activation of spermatogonia
2. By promoting the Sertoli cells to release the ABP and inhibin
3. By releasing testosterone
4. By promoting the Sertoli cells to release testosterone

Q.

A number of hormonal secretions begin or increase during puberty. Which hormone appears to initiate the process of puberty in males?

1. Testosterone

2. Luteinising hormone

3. Gonadotropin releasing hormone

4. Follicle stimulating hormone

Q.

Identify the correct match of column $I,II$ and $III$.

Column - $I$		Column -$II$		Column - $III$
sertoli cells	a	LH	i	spermatogenesis
leydig's cells	b	inhibin	ii	formation of the ovarian follicle
anterior pituitary	c	testosterone	iii	suppress FSH
ovary	d	estrogen	iv	ovulation

1. $A=b-iii,B=a-iii,C=c-I,D=d-iv$
2. $A=b-iii,B=c-I,C=a=iv,D=d-ii$
3. $A=c-ii,B=b-iii,C=a-I,D=d-iv$
4. $B=a-iv,A=d-I,C=b-iii,D=c-ii$