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In case of non-fertilization, corpus lut...

In case of non-fertilization, corpus luteum

A

Stops secreting progesterone

B

Changes to corpus albicans

C

Starts producing progesterone

D

Stops secreting progesterone and changes to corpus albicans

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Corpus luteum is

Which statement is not correct:- (a) In the absence of fertilization, the corpus luteum degenerate (b) During pregnancy all events of menstrual cycle stop (c) The secretion of LH and FSH deceases gradually during the follicular phase (d) The menstrual flow result due to breakdown of endometrial lining

What is corpus luteum?

Assertion : After fertilization corpus luteum is stable till parturition . Reason : After 3 months of intrauterine life it dominantly secretes progesterone .

Read the following statements about menstrual cycle and select two correct statements. (i) Lack of menstruation may be indicative of pregnancy. (ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only. (iii) LH surge induces ovulation. (iv) If fertilization occurs, corpus luteum degenerates immediately

A : If fertilization occurs the corpus luteum is rescued from regression by human chorionic gonadotropin which is produced by placenta R : In first trimester the corpus luteum stimulates by hCG is responsible for the production of progesterone

Assertion : If fertilization does not occur than the corpus luteum begins to degenerate . Reason : The levels of progesterone and estrogen decline due to degeneration of the corpus luteum .

Assertion : The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels . Reason : Rapid fall in the level of progesteron takes place due to degeneration of corpus luteum .

Draw a diagramatic sectional view of human ovary showin stages of oogenesis along with corpus luteum Where is morula formed in humans? Explain the process of its development from zygote

CENGAGE BIOLOGY ENGLISH-HUMAN REPRODUCTION -Assertion -Reasoning Question
  1. In case of non-fertilization, corpus luteum

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  2. Assertion: Scrotum provides optimum temperature conditions for spermat...

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  3. Assertion: The process of reproduction does not suffer if one ovary is...

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  4. Nothing lives for ever, yet life continues. What does it mean?

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  5. Assertion: Placenta is connected to the fetus by an umbilical cord. ...

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  6. Assertion: Placenta is contra-deciduate and even the fetal placenta is...

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  7. Assertion: Polar bodies have small amount of cytoplasm. Reason: It i...

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  8. Assertion: Ovulation takes place when the blood level of luteinizing h...

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  9. Assertion: Umbilical cord contain 100% fetal blood. Reason: It has s...

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  10. Assertion: The activation of sperm is called capacitation Reason: C...

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  11. Assertion: Before fusion, spermatozoa have to penetrate egg membrane....

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  12. Assertion : In post natal life , oocyte development occurs in mature f...

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  13. Assertion : Placenta is combined structure of foetal tissue & maternal...

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  14. Assertion: Seminal vesicle is known as the accessory sex organ of male...

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  15. Assertion: Testes are retroperitoneal organ in man. Reason: Peritone...

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  16. Assertion: Cervix contains the largest and the most powerful sphincter...

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  17. Assertion: In ovarian cycle, corpus luteum is exocrine gland. Reason...

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