Which extra embryonic membrane in humans prevents desiccation of the embryo inside

the uterus ?

1. Chorion

2. Allantois

3. Yolk sac

4. Amnion

Which one of the following statement is incorrect about menstruation?

1. During normal menstruation about 40 mL blood is lost

2. The menstrual fluid can easily clot

3. At menopause in the female, there is especially abrupt increase in gonadotropic

hormones

4. The beginning of the cycle of menstruation is called menarche

Which part of ovary in mammals acts as an endocrine gland after ovulation?

1. Graafian follicle

2. Stroma

3. Germinal epithelium

4. Vitelline membrane

In the human female, menstruation can be deferred by the administration of:

1. LH only

2. Combination of FSH and LH

3. Combination of estrogen and progesterone

4. FSH only

Withdrawal of which of the following hormones is the immediate cause of menstruation ?

1. Estrogen

2. FSH

3. FSH-RH

4. Progesterone

Cleavage differs from mitosis in lacking

1. synthetic phase

2. growth phase

3. both 1. and 2.

4. all of these

Low levels of LH during the secretory phase of the menstrual cycle are primarily due to

1. high estrogen level

2. inhibin

3. high progesterone level

4. high estrogen and progesterone level.

An oocyte is released from the ovary under the influence of LH

1. After completing meiosis and before polar body are released

2. After completing meiosis I and before release of polar body

3. After completing meiosis

4. After completing meiosis I and after release of polar body

Both corpus luteum and macula lutea are

1. found in human ovaries

2. a source of hormones

3. characterized by a yellow colour

4. contributory in maintaining pregnancy.

The phase of menstrual cycle in humans that last for 7-8 days is:

1. follicular phase

2. ovulatory phase

3. luteal phase

4. menstruation