Analyse the options given below and choose the correct options related to menstrual cycle.

i. The pituitary gland stimulates ovaries to produce oestrogen and progesterone.
ii. Egg or the female gamete is released into the fallopian tube.
iii. In the absence of fertilisation, the egg or the female gamete is eliminated from the body along with the uterus lining which comes out as blood at the time of menstruation.

i and iii

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ii and iii

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i and ii

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i , ii and iii

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Solution

The correct option is D i , ii and iii
The ovaries in females release one egg every month which is stimulated by the release of oestrogen and progesterone from the pituitary gland. In case of absence of fertilisation, the body gets rid of the egg along with the inner lining of the uterus which comes out as menstrual blood. The cycle occurs once in every 28-30 days.

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Similar questions

Which of the following events are a part of a menstrual cycle?

i. The pituitary gland stimulates ovaries to produce oestrogen and progesterone hormones.

ii. Egg or the female gamete is released.

iii. Oestrogen stimulates the uterus to build up extra tissue and blood layer to make the wall nutritious for a zygote.

iv. In the absence of fertilisation, the egg or the female gamete is eliminated from the body along with the uterus lining which comes out as blood at the time of menstruation.

Q. Given below are a few statements related to external fertilisation. Choose the correct statements.
(i) The male and female gametes are formed and released simultaneously.
(ii) Only a few gametes are released into the medium.
(iii) Water is the medium in a majority of organisms exhibiting external fertilisation.
(iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Match the terms given in column A with those given in column B :

Column A Column B

(i) Sperm (a) Female organ

(ii) Ovary (b) Egg tube

(iii) Oviduct (c) Male organ

(iv) Testes (d) Male gamete

Q. Refer to the given schematic representation of menstrual cycle showing three phases I, II and Ill.

Select the option that correctly matches these phases with the following events.

(i) FSH secreted by the anterior pituitary stimulates the ovarian follicle to secrete estrogen which stimulates the proliferation of the endometrium.

(ii) LH secreted by the anterior pituitary stimulates the development of corpus luteum which secretes progesterone.

(iii) Reduced production of LH from anterior pituitary causes degeneration of corpus luteum, thereby progesterone production is reduced.

Q. Identify the correct sequence of events from the following.
i. GnRH is produced in the brain.
ii. It then moves to the pituitary gland situated just below the brain.
iii. The pituitary gland releases LH and FSH into the bloodstream.
iv. LH and FSH make gonads to secrete other hormones.
v. These hormones in males and females give rise to the changes observed at puberty.

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