Choose the correct statement.
hPL plays a major role in parturition.
Foetus shows movements first time in the 7th month of pregnancy.
Signal for parturition comes from fully developed foetus and placenta.
Embryo's heart is formed by the 2nd month of pregnancy.
C.
Signal for parturition comes from fully developed foetus and placenta.
Parturition is induced from the fully developed foetus and the placenta. Parturition involves foetal ejection reflex which are mild contractions of the placenta. This reflex triggers release of oxytocin from the maternal pituitary which acts on the uterine muscles and causes stronger uterine contractions and that further stimulates secretion of oxytocin. This stimulatory reflex between uterine muscle contraction and oxytocin secretion continues resulting in stronger contractions and eventually leading into expulsion of the baby out of the uterus.
Select the correct explanation for the labels A, B, C and D
A represents the fertilised zygote.
B represents the stage of morula formation.
C represents the blastocyst.
D represents the blastocyst implantation
Which of the following statements is correct regarding menstrual cycle
LH induces rupturing of Graafian follicle.
Proliferative phase is characterised by the increased production of progesterone.
Corpus luteum secretes large amount of estrogen.
Both LH and FSH attain a peak level in secretory phase.
Assertion: Parturition is induced by neural signal in maternal pituitary.
Reason: At the end of gestation period, the maternal pituitary releases prolactin which causes uterine contractions.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: A male is found to be lacking facial hair and pubic hair.
Reason: It is a case of hyposecretion of testosterone from Leydig's cells of testes.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
The 'cells of Rauber' are
secretory cells of endometrium in uterus
inner cell mass of blastocoel
outer cells of trophoblast in contact with uterine wall
cells of trophoblast, in contact with inner cell mass of blastocyst.
Hormones for the menstrual cycle are produced by
ovaries only
uterus only
ovaries and uterus
ovaries and anterior pituitary
Which of the following statements is correct regarding menstrual cycle?
LH induces rupturing of Graafian follicle
Proliferative phase is characterised by the increased production of progesterone
Corpus luteum secretes large amount of estrogen
Both LH and FSH attain a peak level in secretory phase
Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into urethra.
(i) Prostrate gland
(ii) Seminal vesicle
(iii) Bulbourethral gland
(i) > (ii) > (iii)
(iii) > (ii) > (i)
(ii) > (iii) > (i)
(ii) > (i) > (iii)
