Which of the following hormones is not secreted by the human placenta?

1. HCG

2. HGH

3. HPL

4. Progesterone

Several hormones like hCG, hPL, oestrogen, progesterone are produced by

(1) ovary

(2) placenta

(3) Fallopian tube

(4) pituitary

Ectopic pregnancies are referred to as

1. pregnancies with genetic abnormality

2. implantation of embryo at site other than uterus

3. implantation of defective embryo in the uterus

4. pregnancies terminated due to the hormonal imbalance

Select the correct option describing gonadotropin activity in a normal pregnant female

1. High level of FSH and LH stimulates the thickening of endometrium

2. High level of FSH and LH facilitate implantation of the embryo

3. High level of HCG stimulates the synthesis of estrogen and progesterone

4. High level of HCG stimulates the thickening of endometrium

Which one of the following is not the function of placenta?

1. facilitates supply of oxygen and nutrients to embryo

2. secretes oestrogen

3. facilitates removal of carbon dioxide and waste material from embryo

4. secretes oxytocin during parturition

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

the uterus ?

1. Chorion

2. Allantois

3. Yolk sac

4. Amnion

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

Which one of the following statements with regard to embryonic development in humans

is correct?

1. Cleavage divisions bring about considerable increase in the mass of protoplasm.

2. In the second cleavage division, one of the two blastomeres usually divides a little

sooner than the second.

3. With more cleavage divisions, the resultant blastomeres become larger and larger.

4. Cleavage division results in a hollow ball of cells called morula

Select the correct explanation for the labels A, B, C and D.

(1)    A represents the fertilized zygote.

(2)    B represents the stage of morula formation.

(3)    C represents the blastocyst.

(4)    D represents the blastocyst implantation.