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A : Failure of testes to descend in...

A : Failure of testes to descend into the scrotum causes sterility in man .
R : Higher internal body temperature is not suitable for sperm development

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)

C

If Assertion is true statement but Reason is false then mark (3)

D

If both Assertion and Reason are false statement then Mark (4)

Text Solution

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In mammals, failure of testes to descend into the scrotum is known as

Assertion : In the human the temperature of scrotum is 2-2.5^(@)C lesser then normal body temperature . Reason : Formation of sperm does not occur at normal core body temperature . (a) If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion . (b) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. (c) If Assertion is True but the Reason is False . (d) If both Assertion & Reason are False.

Knowledge Check

  • Assertion: Failure of testes to descend into the scrotum causes sterility in man. Reason: Higher temperature in the abdomen than in the scrotum is not suitable for sperm development.

    A
    If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
    B
    If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
    C
    If Assertion is true but the Reason is false.
    D
    If both Assertion and Reason are false.

  • Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) The scrotum acts as a thermoregulator, maintaining the testes at a temperature 2^(@) lower than that of the body (ii) Corona radiate layer of the ovum prevents polyspermy. (iii) Middle part of ear is derived from the endoderms layer. (iv) The hormone, human chorionic gonadotropin facilitates parturition by softening the connective tissue of the public symphysis.

    A
    `{:("(i)","(ii)","(iii)","(iv)"),(T,T,F,F):}`
    B
    `{:("(i)","(ii)","(iii)","(iv)"),(F,T,F,T):}`
    C
    `{:("(i)","(ii)","(iii)","(iv)"),(T,F,T,F):}`
    D
    `{:("(i)","(ii)","(iii)","(iv)"),(F,F,T,T):}`

    • Similar Questions

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    Consider the following four statements and select the correct option stating which ones are true (T) and which ones are false (F). (i) The scrotum acts as a thermoregulator, maintaining the testes at a temperature 2^(@) lower than that of the body (ii) Corona radiate layer of the ovum prevents polyspermy. (iii) Middle part of ear is derived from the endoderms layer. (iv) The hormone, human chorionic gonadotropin facilitates parturition by softening the connective tissue of the public symphysis.

    Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum . Reason : Spermatogenesis process requires less than body temperature .

    Name the hormone responsible for the descent of testes into scrotum. Why does the failure of this process result in sterility?

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    A: In test-tube baby programme, ova from wife/donor (female) and sperms from the husband/donor(male) are collected and induced to form zygote under simulated conditons in laboratory. R: Embryos with more than 8 blastomees are then transferred to fallopian tube (ZIFT) to completes its further development.

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