(7) Use the graph on the right showing changes during the menstrual cycle. The i
ID: 282042 • Letter: #
Question
(7) Use the graph on the right showing changes during the menstrual cycle. The increase shown at point A is caused by the effect of A estrogen on the adenohypophysis B. FSH on the ovary Cprogesterone on the hypothalamus D. LH on the anterior pituitary Blood levels of which substance are described by the curve labeled 8 C FSH D. LH A. estrogen B.progesterone The source of the increase in concentration indicated at point C is the C adenohypohysis D. adrenal cortex E. corpus luteum A, hypothalamus B, ovarian follicle The source of the increase in concentration indicated at point D is the C. adenohypohysis A hypothalamus E. corpus luteum B. ovarian follicle D. adrenal cortex The cause of the sudden increase shown at point E is A. progesterone inhibiting GnRH secretion by the hypothalamus B. estrogen inhibiting FSH secretion by the gonadotropes C. FSH inhibiting secretion of androgen in the ovary D. FSH causing secretion of estrogen by granulosa cells E, estrogen increasing LH secretion by the gonadotropes Point E marks the event called A. ovulation B. fertilization C. implantation D. gestation E parturition Feedback mechanisms occur to regulate bodily functions. in the female reproductive system, both positive and negative feedback systems are at work to regulate the 2713 57 9 11 13 15 7 19 21 23 55 271 menstrual cycle. Which of the following is FALSE? A. At days, 17-27, FSH and LH levels are suppressed by negative feedback of estrogen on the adenohypophysis. B. A burst of estrogen synthesis at days 11-13 has a positive feedback effect on FSH and LH secretion. C Ovulation occurs as a result of the estrogen-induced LH surge. D. At days 1-14, negative feedback predominates * (4) In males, the testis has both exocrine and endocrine functions. Its exocrine function involves the production and maturation of inside the (cells) perform endocrine functions by producing estrogen/progesterone / testosterone (structural unit). Outside this unit, the (2) Which of the following does NOT pertain to the catecholamines? . They are non-steroidal hormones synthesized in the adrenal medulla. They respond to short-term stress situations They exert a diabetogenic effect by inhibiting glucose uptake into dipocytes and skeletal muscles Cross out the wrong term/s and replace it to make the statement CORRECT They are hormones produced by using cholesterol as precursor In response to suckling, oxytocin promotes ; it also inducesExplanation / Answer
Answer to "Graph on menstrual cycle"
The increase shown at A is caused by effect of
Answer : progesterone on hypothalamus (Option C)
The curve is of basal body temperature which increases after ovulation
Blood levels of which substance are shown in curve B:
Answer: Progesterone (Option B)
Source of increase in concentration indicated at C:
Answer: Ovarian follicle (Option B)
Source of increase in concentration indicated at D:
Answer : Corpus luteum (Option E)
Cause of sudden increase shown at point E:
Answer : estrogen increasing LH secreation by gonadotropes
Point E marks an event called:
Answer : Ovulation
Feedback mechanisms-------which of the following is false?
Answer: At days 1-14, negative feedback predominates (Option D)
This is FALSE because in these days, both negative and positive feedback occur, from 12-14 day, there is positive feedback by estrogen to promote FSH and LH production while in 15-28 days, there is only negative feedback taking place.
Question:
In males, the testis has both exocrine and endocrine function. Its exocrine function involves the production and maturation of _____________inside the ______________(structural unit). Outside this unit, the __________ (cells) perform endocrine function by producing estrogen/progesterone/testosterone.
Answer to this, Blank 1 Sperms,
Blank 2 Seminiferous tubules
Blank 3 Leydig cells
Blank 4 testosterone (estrogen and progesterone are incorrect)
Question: Which of the following doesnot pertain to catecholamines?
Answer: Option D i.e. They are hormones produced by using cholesterol as precursors.
This is not correct about catecholamines because their precursors are tyrosine and phenylalanine
Question:
In response to suckling, oxytocin promotes __________________________; it also induces___________-______________.
Answer : Blank 1, milk ejection by mammary glands
Blank 2, infertility due to lactation in mother
Blank 3, Lactational amenorrhea
Oxytocin hormone causes milk ejection when the offspring suckles. Along with this, the hormone causes Lactional amenorrhea in humans and results in providing spacing between the children and allows proper survival and growth of the new born.
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