Function of Cells in the Seminiferous Tubules

Q.

Describe the structure of a seminiferous tubule.

Q.

What is the role of the seminiferous tubules?

Q.

Androgens are secreted from

1. Ovary and placenta.

2. Ovary and testes.

3. Only testis.

4. Testis and adrenal.

Q.

Identify true/false statements. Correct each false statement to make it true.

(a) Androgens are produced by Sertoli cells. (True/ False)

(b) Spermatazoa get nutrition from Sertoli cells. (True/ False)

(c) Leydig cells are found in ovary. (True/ False)

(d) Leydig cells synthesis androgens. (True/ False)

(e) Oogenesis takes place in corpus luteum. (True/ False)

(f) Menstrual cycle ceases during pregnancy. (True/ False)

(g) Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/ False)

Q.

What cells provide nutrients to sperm?

Q. PEN stands for

1. Primary endosperm nourishment
2. Poly embryo nourishment
3. Primary endosperm nucleus
4. Primary embryo nourishment

Q. Which of the following gives rise to spindle fibres during cleavage of zygote?

1. Proximal centriole
2. Distal centriole
3. Lateral centriole
4. Ring centriole

Q.

Choose the odd one out from the following terms given:

1. Prostate gland

2. Cowpers gland

3. seminal vesicle

4. seminiferous tubules

Q. Identify True/False statements. Correct each false statement to make it true.
(a) Androgens are produced by Sertoli cells. (True/False)
(b) Spermatozoa get nutrition from Sertoli cells. (True/False)
(c) Leydig cells are found in ovary. (True/False)
(d) Leydig cells synthesise androgens. (True/False)
(e) Oogenesis takes place in corpus luteum. (True/False)
(f) Menstrual cycle ceases during pregnancy. (True/False)
(g) Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/False)

Q. Androgen binding protein (ABP) is secreted by:

1. Interstitial cells
2. Leydig cells
3. Sertoli cells
4. Germinal epithelium

Q.

Identify True/False statements. Correct each false statement to make it true.

(a) Androgens are produced by Sertoli cells. (True/False)

(b) Spermatozoa get nutrition from Sertoli cells. (True/False)

(c) Leydig cells are found in ovary. (True/False)

(d) Leydig cells synthesise androgens. (True/False)

(e) Oogenesis takes place in corpus luteum. (True/False)

(f) Menstrual cycle ceases during pregnancy. (True/False)

(g) Presence or absence of hymen is not a reliable indicator of virginity

or sexual experience. (True/False)

Q. The blood-testis barrier is formed by

1. spermatogonia
2. spermatids
3. Sertoli cells
4. Leydig cells

Q. Which is absent in human sperm?

1. Endoplasmic reticulum
   
2. Centriole
3. Mitochondria
   
4. Nucleus
   

Q.

What happens if blood testis barrier is breached?

Q. The process of sperm production takes place in the

1. Epididymis
2. Vas deferens
3. Prostate gland
4. Seminiferous tubules

Q. Sertoli cells are found in:

1. pancreas and secrete cholecystokinin
2. seminiferous tubules and provide nutrition to germ cells
3. ovaries and secrete progesterone
4. adrenal cortex and secrete adrenaline

Q. Match column I with column II, and choose the correct combination from the options given below.

Column I	Column II
a. Trophoblast	i. Embedding of blastocyst in the endometrium
b. Cleavage	ii. Group of cells that would differentiate as embryo
c. Inner cell mass	iii. Outer layer of Blastocyst attached to the endometrium
d. Implantation	iv. Mitotic division of zygote

1. a - ii, b - i, c - iii and c - iv
   
2. a - ii, b - iv, c - iii and d - i
   
3. a - iii, b - i, c - ii and d - iv
   
4. a - iii, b - iv, c - ii and d - i
   

Q. Match the columns I and II, and choose the correct combination from the options given.

	Column I		Column II
a	Head	i	Enzymes
b	Middle piece	ii	Sperm motility
c	Acrosome	iii	Energy
d	Tail	iv	Genetic material

1. a - iv, b - iii, c - i and d - ii
   
2. a - ii, b - i, c - iii and d - iv
3. a - iv, b - i, c - ii and d - iii
4. a - iv, b - iii, c - i and d - ii
   

Q. What is f cell mention its function in seminiferous tubules

Q. The technique in which the zona pellucida layer of an oocyte is punctured to facilitate the artificial insertion of the spermatozoon is

1. TVOR
2. ZIFT
3. ICSI
4. Cryopreservation

Q. The principal tail piece of human sperm shows the microtubular arrangement of __________.

1. 7 + 2
2. 9 + 2
3. 11 + 2
4. 13 + 2

Q. The head of a mature sperm is mainly composed of

1. Elongated nucleus and acrosomal material
2. Mitochondria, cytoplasm and nucleus
3. Two centriole and the axial filament
4. All of the above

Q. Sertoli cells are found in:

1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenaline
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin

Q. How many secondary spermatocytes will form 400 spermatozoa?

1. 100
2. 400
3. 200
4. 40

Q. Androgen binding protein (ABP) is secreted by:

1. Interstitial cells
2. Leydig cells
3. Sertoli cells
4. Germinal epithelium

Q. Which of the following is diploid?

1. Secondary spermatocytes
2. Spermatozoa and ova
3. Spermatogonia, oogonia, primary spermatocyte
4. Secondary oocytes

Q.

Sertoli cells are also called as ________

1. secretory cells

2. respiratory cells

3. excretory cells

4. nurse cells

Q.

1. Male genital pores are present on 18th segment
2. Clitellum is present on segments 24, 25, 26.
3. Genital papillae are present in 17th and 19th segment
4. Segments of earthworm are called somites

Q. Spermioteleosis is another name of

1. Maturation of ovum
2. Spermiogenesis
3. Spermatogenesis
4. Degeneration of sperms

Q. Very short answer type.
Name the exact part of the uriniferous tubule which is directly influenced by ADH.