Importance of Corpus Luteum

Q.

Name the functions of the following:

(i) Corpus luteum.

(ii) Endometrium.

(iii) Acrosome.

(iv) Sperm tail.

(v) Fimbriae.

Q. The main function of mammalian corpus luteum is to produce:

1. estrogen
2. progesterone
3. human chorionic gonadotropin
4. relaxin only

Q.

What is a corpus luteum?

Q.

Briefly mention the mechanism of action of FSH.

Q. The main cause of the disintegration of the endometrial lining?

1. LH surge

2. Degeneration of corpus luteum
   

3. Ovulation during mid-cycle

4. Implantation leads to pregnancy
   

Q.

What hormone promotes and maintains endometrial lining?

Q.

In the absence of pregnancy, corpus luteum __________.

1. becomes active and secretes FSH and LH

2. produces a lot of oxytocin and relaxin

3. starts to degenerate

4. is maintained by progesterone

Q.

The hormone, which, stimulates the secretion of milk in mammary glands in women, is called:

1. MSH

2. LTH

3. LH

4. FSH

Q. Supporting cells found in between spermatogonia are

1. Germinal cells
2. Sertoli cells
3. Lymph space
4. Epithelial cells

Q.

Which of the following statements is correct?

1. Corpus luteum is not formed during pregnancy

2. Corpus luteum changes into corpus albicans

3. Corpus luteum persists throughout pregnancy

4. Corpus luteum degenerates after fertilization

Q.

Corpus luteum secretes a hormone called

(a) prolactin

(b) progesterone

(c) aldosterone

(d) testosterone

Q. Which pairs is/are correct?
(a) Corpus luteum – Progesterone
(b) Theca interna – Estrogen
(c) Sertoli cells – Inhibin

1. a only
2. b only
3. c only
4. a, b and c

Q. During ovulation, the oocyte that is released from the Graafian follicle is covered by different membranes. Which of the following is not a membrane present in the oocyte?

Q.

what is the perfect defination of oestrus cycle and menstrual cycle ? what is the difference between them ?

Q.

After ovulation, if egg is not fertilized the corpus luteum degenerates to form

1. Corpus spongiosum

2. Corpus albicans

3. None of these

4. Corpus callosum

Q. Choose the change occuring during luteal phase of menstrual cycle

1. Shedding of endometrium
2. Release of secondary oocyte
3. Growth of follicles
4. Secretion of progesterone

Q. A surge in the hormone induces the rupture of Graafian follicle, which eventually turns into after ovulation.

1. FSH
2. LH
3. Progesterone
4. corpus luteum
5. mature ovum
6. zona pellucida

Q. Which pairs is/are correct?
(a) Corpus luteum – Progesterone
(b) Theca interna – Estrogen
(c) Sertoli cells – Inhibin

1. a only
2. b only
3. c only
4. a, b and c

Q. Draw a labelled diagram of a section through ovary showing different stages of follicles, ovulation and corpus luteum.

Q. A sperm tail consists of

1. A nucleus
2. Mitochondria
3. Golgi body
4. Flagellum

Q.

what is the function of trophoblast in blastocyst?

Q.

Corpus luteum is responsible for production of

1. FSH

2. LH

3. Progesterone

4. Lactogenic principle

Q.

During the process of amniocentesis, analysis of which foetal liquid is involved?

1. Amphipathic molecules
2. Amino acids
3. Body fluid of amniotes
4. Amniotic fluid

Q. Onset of pregnancy

1. Stimulates testosterone secretion
2. Inhibits further ovulation
3. Leads to degeneration of ovary
4. Inhibits fusion of egg and sperm nuclei

Q. Corpus luteum produces

1. oestrogen
2. prolactin
3. FSH
4. progesterone

Q. Corpus luteum secretes a hormone called

1. prolactin
2. progesterone
3. aldosterone
4. testosterone

Q. Name the development stage of egg which exits the ovary in ovulation.

Q.

After ovulation, if egg is not fertilized the corpus luteum degenerates to form

1. Corpus spongiosum

2. Corpus callosum

3. Corpus albicans

4. None of these

Q. what is suspension of oestrous cycle called?

Q. Meroblastic cleavage takes place in

1. Amphioxus
2. Frog
3. Hydra
4. Chick