1 a sudden release of FSH from the anterior pituitary.
2 a lack of estrogens and progesterone due to degeneration of the corpus luteum.
3 an increased release of estrogens and progesterone from the corpus luteum.
4 a sudden drop in LH.
Explanation:
(b) A decrease in estrogen and progesterone as the corpus luteum degenerates (in the absence of pregnancy) initiates menstruation.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286466
Study the given figure and identify the correct event occurring in this.
1 Role of pituitary hormones levels.
2 Events occurring in uterine tissues.
3 Role of ovarian hormone levels and growth of ovarian follicles.
4 Both (a.)and (c.).
Explanation:
(c) The given figure shows the role of ovarian hormones and growth of ovarian follicles in the various phases of menstrual cycle.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286467
Which of the following hormones attains a peak level in the middle of menstrual cycle?
1 LH and estrogen
2 $\text{FSH}$ and progesterone
3 FSH and LH
4 Estrogen and progesterone
Explanation:
(c) Both LH and FSH attain a peak level in the middle of menstrual cycle (about 14th day) resulting in ovulation.
NCERT Page-51 / N-34
Human Reproduction(NCERT)
286468
In normal pregnant women, the amount of total gonadotropin activity was assessed. The result expected was
1 high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2 high level of circulating hCG to stimulate endometrial thickening
3 high levels of FSH and LH in uterus to stimulate endometrial thickening
4 high levels of circulating hCG to stimulate estrogen and progesterone synthesis.
Explanation:
(d) Placenta acts as an endocrine gland during pregnancy and produces several hormones include human chorionic gonadotropin (hCG), estrogen, progesterone and so on. hCG stimulates the corpus luteum to secrete progesterone.
1 a sudden release of FSH from the anterior pituitary.
2 a lack of estrogens and progesterone due to degeneration of the corpus luteum.
3 an increased release of estrogens and progesterone from the corpus luteum.
4 a sudden drop in LH.
Explanation:
(b) A decrease in estrogen and progesterone as the corpus luteum degenerates (in the absence of pregnancy) initiates menstruation.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286466
Study the given figure and identify the correct event occurring in this.
1 Role of pituitary hormones levels.
2 Events occurring in uterine tissues.
3 Role of ovarian hormone levels and growth of ovarian follicles.
4 Both (a.)and (c.).
Explanation:
(c) The given figure shows the role of ovarian hormones and growth of ovarian follicles in the various phases of menstrual cycle.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286467
Which of the following hormones attains a peak level in the middle of menstrual cycle?
1 LH and estrogen
2 $\text{FSH}$ and progesterone
3 FSH and LH
4 Estrogen and progesterone
Explanation:
(c) Both LH and FSH attain a peak level in the middle of menstrual cycle (about 14th day) resulting in ovulation.
NCERT Page-51 / N-34
Human Reproduction(NCERT)
286468
In normal pregnant women, the amount of total gonadotropin activity was assessed. The result expected was
1 high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2 high level of circulating hCG to stimulate endometrial thickening
3 high levels of FSH and LH in uterus to stimulate endometrial thickening
4 high levels of circulating hCG to stimulate estrogen and progesterone synthesis.
Explanation:
(d) Placenta acts as an endocrine gland during pregnancy and produces several hormones include human chorionic gonadotropin (hCG), estrogen, progesterone and so on. hCG stimulates the corpus luteum to secrete progesterone.
1 a sudden release of FSH from the anterior pituitary.
2 a lack of estrogens and progesterone due to degeneration of the corpus luteum.
3 an increased release of estrogens and progesterone from the corpus luteum.
4 a sudden drop in LH.
Explanation:
(b) A decrease in estrogen and progesterone as the corpus luteum degenerates (in the absence of pregnancy) initiates menstruation.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286466
Study the given figure and identify the correct event occurring in this.
1 Role of pituitary hormones levels.
2 Events occurring in uterine tissues.
3 Role of ovarian hormone levels and growth of ovarian follicles.
4 Both (a.)and (c.).
Explanation:
(c) The given figure shows the role of ovarian hormones and growth of ovarian follicles in the various phases of menstrual cycle.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286467
Which of the following hormones attains a peak level in the middle of menstrual cycle?
1 LH and estrogen
2 $\text{FSH}$ and progesterone
3 FSH and LH
4 Estrogen and progesterone
Explanation:
(c) Both LH and FSH attain a peak level in the middle of menstrual cycle (about 14th day) resulting in ovulation.
NCERT Page-51 / N-34
Human Reproduction(NCERT)
286468
In normal pregnant women, the amount of total gonadotropin activity was assessed. The result expected was
1 high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2 high level of circulating hCG to stimulate endometrial thickening
3 high levels of FSH and LH in uterus to stimulate endometrial thickening
4 high levels of circulating hCG to stimulate estrogen and progesterone synthesis.
Explanation:
(d) Placenta acts as an endocrine gland during pregnancy and produces several hormones include human chorionic gonadotropin (hCG), estrogen, progesterone and so on. hCG stimulates the corpus luteum to secrete progesterone.
1 a sudden release of FSH from the anterior pituitary.
2 a lack of estrogens and progesterone due to degeneration of the corpus luteum.
3 an increased release of estrogens and progesterone from the corpus luteum.
4 a sudden drop in LH.
Explanation:
(b) A decrease in estrogen and progesterone as the corpus luteum degenerates (in the absence of pregnancy) initiates menstruation.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286466
Study the given figure and identify the correct event occurring in this.
1 Role of pituitary hormones levels.
2 Events occurring in uterine tissues.
3 Role of ovarian hormone levels and growth of ovarian follicles.
4 Both (a.)and (c.).
Explanation:
(c) The given figure shows the role of ovarian hormones and growth of ovarian follicles in the various phases of menstrual cycle.
NCERT Page-50 / N-34
Human Reproduction(NCERT)
286467
Which of the following hormones attains a peak level in the middle of menstrual cycle?
1 LH and estrogen
2 $\text{FSH}$ and progesterone
3 FSH and LH
4 Estrogen and progesterone
Explanation:
(c) Both LH and FSH attain a peak level in the middle of menstrual cycle (about 14th day) resulting in ovulation.
NCERT Page-51 / N-34
Human Reproduction(NCERT)
286468
In normal pregnant women, the amount of total gonadotropin activity was assessed. The result expected was
1 high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2 high level of circulating hCG to stimulate endometrial thickening
3 high levels of FSH and LH in uterus to stimulate endometrial thickening
4 high levels of circulating hCG to stimulate estrogen and progesterone synthesis.
Explanation:
(d) Placenta acts as an endocrine gland during pregnancy and produces several hormones include human chorionic gonadotropin (hCG), estrogen, progesterone and so on. hCG stimulates the corpus luteum to secrete progesterone.
