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Byju's Answer
Standard XII
Biology
Ovaries
Select the co...
Question

Select the correct match of endocrine gland, its hormone and its function.

A
Corpus luteum - estrogen - essential for maintenance of endometrium
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B
Leydig cells - androgen - initiates production of sperms
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C
Ovary - FSH - stimulates follicular development and secretion of estrogens
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D
Pancreas - estrogen - initiates secretion of milk
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Solution

The correct option is B Leydig cells - androgen - initiates production of sperms
A. Corpus luteum secretes progesterone which is essential for maintenance of endometrium.
B. Leydig cells of testes secrete androgen (testosterone) which stimulates spermatogenesis (formation of sperms from germ cells).
C. Ovary contains ovarian follicles which secrete estrogen. The development of ovarian follicles is stimulated by FSH secreted from anterior pituitary.
D. Pancreas secrete glucagon and insulin hormone which regulate blood sugar level.
So, the correct answer is 'Leydig cells - androgen - initiates production of sperms'.

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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.

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Q. The secretion of testosterone and estrogen by testes and ovaries respectively is under the control of endocrine gland X. Endocrine gland X is ____________.
Q. Complete the paragraph with the help of words given in the bracket. (Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum)

Growth of follicles present in the ovary occurs under the effect of ----- This follicle secretes estrogen. -- --- - -- -- -- grows / regenerates under the effect of estrogen. Under the effect of --- ---, fully grown up follicle bursts, ovulation occurs and -- --- -- -- is formed from remaining part of follicle. It secrets --- --- -- -- and --- --- -- -- --. Under the effect of these hormones, glands of -- -- -- -- are activated and it becomes ready for implantation.
Q.

Name the endocrine gland which controls the production of sex hormones 'testosterone' and 'estrogen'.

Q. Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/ deficiency symptom.
Endocrine glandHormoneFunction/ deficiency symptoms
(A) Anterior pituitaryOxytocin Stimulates uterus contraction during child birth
(B) Posterior pituitaryGrowth Hormone(GH)Over-secretion stimulates abnormal growth
(C) Thyroid glandThyroxineLack of iodine in diet results in goitre
(D) Corpus luteumTestosteroneStimulates spermatogenesis

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