Question

Read the sources given and answer any four from the questions given below:

The ovarian or the menstrual cycle in human beings involves a number of cyclic changes that occur in the ovary and uterus under the influence of FSH and LH from anterior pituitary. The cycle occurs with a periodicity of about 28 days with ovulation occurring around the 14th day. If ovum is not fertilised, the corpus luteum formed after ovulation, degenerates. Consequently by the 28th day, the lining of the uterusthe endometrium breaks down and the cycle begins again. Refer to the figure given below with various phases of the menstrual cycle and answer the questions that follow.

1. Which days of the menstrual cycle mark the proliferative phase?
   1. 1-5
   2. 15-23
   3. 6-14
   4. 13-17
2. Identify the hormones that are at peak level during ovulatory phase
   1. progesterone
   2. FSH
   3. LH
   4. both FSH and LH
3. Which of the following occurs during secretory phase?
   1. follicles mature
   2. endometrium breaks
   3. corpus luteum develops
   4. oestrogen level keeps increasing
4. The breakdown of endometrium occurs during the following phase
   1. proliferative
   2. luteal
   3. follicular
   4. menstrual
5. Increase in the thickness of uterine lining is directly related to increase in the following hormone
   1. progesterone
   2. FSH
   3. LH
   4. Oestrogen

Answer 1

1. 6-14
2. both FSH and LH
3. corpus luteum develops
4. menstrual
5. progesterone