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ENDOCRINE: BRS PHYSIOLOGY EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
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ENDOCRINE: BRS PHYSIOLOGY EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED B. progesterone on the hypothalamus. Curve A shows basal body temperature. The increase in temp. occurs as a result of elevated progesterone levels during the luteal (secretory) phase of the menstrual cycle. p...

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  • November 14, 2024
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  • 2024/2025
  • Exam (elaborations)
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ENDOCRINE: BRS PHYSIOLOGY EXAM QUESTIONS AND

ANSWERS WITH COMPLETE SOLUTIONS VERIFIED


B. progesterone on the hypothalamus.

Curve A shows basal body temperature. The increase in temp. occurs as a result

of elevated progesterone levels during the luteal (secretory) phase of the

menstrual cycle. progesterone incr. the set-point temperature in the hypothalamic

thermoregulatory center.

The increase shown at point A is caused by the effect of



A. estrogen on the ant. pit

B. progesterone on the hypothalamus

C. FSH on the ovary

D. LH on the ant. pit.

E. prolactin on the ovary

C. progesterone. progesterone is secreted during the luteal phase of the

menstrual cycle.

Blood levels of which substance are described by curve B?

A. estradiol

B. estriol

C. progesterone

,D. FSH

E. LH

D. ovary. the curve shows blood levels of estradiol. the source of the increase in

estradiol concentration shown at point C is the ovarian granulosa cells, which

contain high concentrations of aromatase and convert testosterone to estradiol.

The source of the incr. in concentration indicated at point C is the



A. hypothalamus

B. ant. pit.

C. corpus luteum

D. ovary

E. adrenal cortex

C. corpus luteum.

the curve shows blood levels of estradiol. the source of the increase in estradiol

is the corpus luteum. the corpus luteum prepares the uterus to recieve a fertilized

egg. the HCG released from the placenta keeps the corpus luteum from

degenerating to the corpus albicans

The source of the incr. in concentration at point D is the



A. ovary

B. adrenal cortex

C. corpus luteum

, D. hypothalamus

E. ant. pit.

D. positive feedback of FSH on the ovary. point E shows the LH surge that

initiates ovulation at midcycle. the LH surge is caused by increasing estrogen

levels from the developing ovarian follicle. incr. estrogen by positive feedback,

stimulates the ant. pit. to secrete LH and FSH

The cause of the sudden incr. shown at point E is



A. negative feedback of progesterone on the hypothalamus

B. negative feedback of estrogen on the ant. pit

C. negative feedback of FSH on the ovary

D. positive feedback of FSH on the ovary

E. positive feedback of estrogen on the ant. pit

D. hypoparathyroidism after thyroid surgery. low blood Ca2+ and high blood PO4-

are consistent w/ hypoparathyroidism. Lack of PTH decr. bone resorption, decr.

renal Ca2+ reabsorption, and incr. renal PO4- reabsorption causing low urinary

PO4- to prevent Ca2+ from binding to PO4- in the urine. b/c the pt responded to

exogenous PTH, the PTH receptor is normal, so the issue is deficient PTH. most

of common cause of PTH deficiency is lesion of the parathyroids due to thyroid

surgery.

A woman has hypocalcemia, hyperphosphatemia, and decr. urinary phosphate

excretion. injection of PTH causes an incr. in urinary cAMP. the most likely dx is

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