Menstrual Cycle

Q.

How many days a month are you fertile?

Q. Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

1. Retention of well-developed corpus luteum
2. Fertilization of the ovum
3. Maintenance of the hypertrophical endometrial lining
4. Maintenance of high concentration of sex hormones in the blood stream

Q. Which is the structure that connects the foetus to the placenta?

1. Umbilical cord
2. Yolk sac
3. Amnion
4. Chorion

Q. Match the items given in Column I with those in Column II and select the correct option given below:

Column I	Column II
a. Proliferative phase	i. Breakdown of endometrial lining
b. Secretory phase	ii. Follicular phase
c. Menstruation	iii. Luteal phase

1. a(ii)., b(iii)., c(i)
2. a(i) ., b(iii)., c(ii)
3. a(iii)., b(ii)., c(ii)
4. a(iii)., b(i)., c(ii)

Q. Which of the following terms can be used to describe the swollen area of endometrial cells of the uterus that has an embryo embedded inside it?

1. Cytotrophoblast
2. Syncytiotrophoblast
3. Bilaminar embryonic disc
4. Decidua

Q. Match the following hormones with their functions.
$\begin{array}{cc}\text{A. FSH}& \text{1. Stimulates Leydig cells of}\\ & \text{testes}\\ \text{B. Luteinizing hormone}& \text{2. Responsible for the release of FSH, LH}\\ \text{C. Gonadotropin releasing hormone}& \text{3. Stimulates spermatogenesis}\end{array}$

1. A-3, B-1, C-2
2. A-1, B-2, C-3
3. A-2, B-1, C-3
4. A-2, B-3, C-1

Q. Which of the following occurs first during the development process of an embryo?

1. Differentiation of organ system
2. Differentiation of cells
3. Differentiation of tissues
4. Differentiation of organ

Q. Placenta in humans is a temporary organ formed during pregnancy. It is formed by

1. chorion and uterine wall
2. chorion only
3. amnion only
4. yolk sac only

Q. A decrease in the level of estrogen-progesterone causes

1. Growth and dilation of myometrium
2. Constriction of uterine blood vessels leading to shedding of endometrium or uterine epithelium
3. Growth of endometrium
4. Release of ovum from the ovary

Q. Assertion: Small disc-shaped structures at the surface of the centromeres are called kinetochores.
Reason: Kinetochores serve as the sites of attachment of spindle fibres to the centromeres.

1. Both assertion and reason are true and the reason is not the correct explanation of the assertion.
2. Assertion is true but reason is false.
3. Both assertion and reason are true and the reason is the correct explanation of the assertion.
4. Both assertion and reason are false.

Q.

Menstrual cycle is the shedding of _________.

1. Endometrium

2. Myometrium

3. Perimetrium

4. All of the above

Q. Human placenta is classified as ___________

1. Haemochorial
   
2. Endotheliochorial
3. Mesoeliochorial
   
4. Epitheliochorial
   

Q. Which of the following occurs first during the development process of an embryo?

Q. During ovulation, the Graafian follicle empties its contents outside. It then regresses into

1. corpus spongiosum
2. corpus luteum
3. corpus albicans
4. corpus callosum