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Byju's Answer
Standard XII
Biology
Changes during Menstrual Cycle
Which of the ...
Question

Which of the following combinations is most likely to be present before ovulation occurs?

A
FSH, corpus luteum, estrogen, secretory uterine lining
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B
Luteinizing hormone (LH), follicle, progesterone, thick uterine lining
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C
FSH, follicle, estrogen, uterine lining becoming thick
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D
LH, corpus luteum, progesterone, secretory uterine lining
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Solution

The correct option is C FSH, follicle, estrogen, uterine lining becoming thick
Several hormones are involved in the menstrual cycle of a woman. Follicle stimulating hormone (FSH) causes the maturation of an egg in the ovary. Luteinising hormone (LH) stimulates the release of the egg. Estrogen is involved in repairing and thickening the uterus lining, progesterone maintains the uterine lining. The menstrual cycle lasts for approximately 28 days.
So the correct option is 'FSH, follicle, estrogen, uterine line becoming thick'.

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Q. Which of the following hormones is secreted by implanted blastocyst, that acts on the corpus luteum in the ovary, stimulating the body to produce estrogens and progesterone to maintain the uterine lining?
Q.
Column I Column II
(a) FSH (i) Prepare endometrium for implantation
(b) LH (ii) Develop female secondary sexual characters
(c) Progesterone (iii) Contraction of uterine wall
(d) Estrogen (iv) Development of corpus luteum
(v) Maturation of Graafian follicle
Match the hormone in column I with their function in column II and choose the correct combination from the following.
Q. Assertion :Corpus luteum is produced by Graafian follicle after ovulation. Reason: It secretes estrogen which is necessary to maintain pregnancy.
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. Match column 1 to column 2:
Column 1 Column 2
a FSH 1 Prepare endometrium for implantation
b LH 2 Develops female secondary sexual characters
c Progesterone 3 Maturation of Graafian follicle
d Estrogen 4 Development of corpus luteum

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