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

Ultrasound of how much frequency is beamed into human body for sonography ?

1. 30-45 MHz

2. 15-30 MHz

3. 1-15 MHz

4. 45-70 MHz

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

1. Estrogen

2. FSH

3. FSH-RH

4. Progesterone

Which of the following statements is incorrect ?

1. The spermatids differentiate into structurally complex spermatozoa by the process of

spermiogenesis.

2. Fertilisation is a physico-chemical event.

3. Cleavage transforms the fertilized ovum into a sphere of aggregated blastomeres.

into a sphere of aggregated blastomeres.

4. Cleavage divisions bring appreciable increase in the mass of protoplasm in the

developing embryo.

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