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Physiology > Section 6 Exam Review > Flashcards

Section 6 Exam Review Flashcards

1
Q

Increase in plasma K+ concentration will lead to:

A

aldosterone secretion

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2
Q

Activity of what results in iodination?

A

thyroid peroxidase

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3
Q

True or False? TSH can increase the activity of the iodide pump.

A

T

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4
Q

Main source of thyroid hormones in the plasma:

A

T4

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5
Q

In which part of the nephron is water reabsorbed via ADH?

A

Distal collecting suct

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6
Q

Effect of ADH on capillary hydrostatic pressure:

A

decreases

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7
Q

When does ADH target the vasculature?

A

at higher levels

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8
Q

What happens in response to an elevated calcium level?

A

an initial increase in phosphate excretion

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9
Q

True or False? secretion of CRH increases if the infundibulm stalk is cut.

A

T

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10
Q

What levels decrease if the infundibulum stalk is cut?

A

ACTH, testosterone, estrogen, vasopression (ADH) (everything but prolactin and CRH)

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11
Q

What levels increase if the infundibulum stalk is cut?

A

secretion of prolactin and CRH

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12
Q

What stimulates osteocytes to reabsorb Ca and P from the bone?

A

PTH (osteocytic osteolysis)

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13
Q

Hypoglycemia increases the secretion of:

A

cortisol, epinephrine, glucagon, growth hormone

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14
Q

True or False? Hypoglycemia increases the secretion of somatostatin.

A

F

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15
Q

What does the influence of glucose on insulin secretion require?

A

glucose metabolism within the islet cell

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16
Q

How will a high protein meal affect growth hormone levels/

A

increased growth hormone

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17
Q

List insulin sensitive cells:

A

fat, liver, and muscle

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18
Q

What is the prevention of hypoglycemia primarily regulated by?

A

glucagon

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19
Q

What does glucagon stimulate?

A

lipolysis in adipocytes

20
Q

Pituitary hormone that stimulates milk production by the mammary glands:

A

prolactin

21
Q

What type of interaction does thyroid hormone have in regards to its actions on IGF-1?

A

permissive

22
Q

From where do osteocytes resorb Ca and P when stimulated by phosphate?

A

bone

23
Q

Decreased levels of calcium ionsin the blood stimulate the secretion of what hormone?

A

PTH

24
Q

Which cells have calcitonin receptors?

A

osteoclasts

25
Q

Elevated plasma calcium levels are sensed by what cells?

A

chief cells

26
Q

Vitamin D intoxication results in:

A

elevated plasma calcium and phosphate

27
Q

Describe pathway if vitamin D levels are too high:

A

Vitamin D through skin or diet. processed in liver, then to kidney. If kidney senses too much calcium it will tell PTH to secrete less.

28
Q

Premature closure of the epiphyseal plates could be caused by:

A

elevated levels of estrogen

29
Q

Product of the SRY gene:

A

testis determining factor

30
Q

True or False? Aromatase is the rate-limiting enzymes responsible for the production of weak androgens.

A

T? (check)

31
Q

Affect of LH on Leydig cells:

A

tells them to secrete testosterone

32
Q

Role of the pituitary hormone FSH in males:

A

initiate sperm production in the testes

33
Q

What is triggered by the surge in LH that occurs during the middle of the ovarian cycle?

A

ovulation

34
Q

Principal hormone secreted by the corpus luteum:

A

progesterone

35
Q

Mestruation is triggered by a drop in:

A

estrogen and progesterone

36
Q

A pregnant woman with an inadequate oral intake of calcium, supplies for her developign fetus comes from:

A

bones

37
Q

Blood levels affected in hyperthyroidism:

A

undetectable TSH and elevated serum free T3

38
Q

Action of the ovary in the follicular phase of the ovaian cycle:

A

maturing follicle

39
Q

Hypothalamic hormone released into the circulation in response to fluid depletion:

A

ADH

40
Q

True or False? Oxytocin induces parturition.

A

F.

41
Q

Where is oxytocin produced?

A

in the paraventricular unclesu of the hypothalamus

42
Q

What can oxytocin prevent?

A

excessibv bleeding after placental delivery

43
Q

What type of relex oxytocin release?

A

neuro-endocrine reflex

44
Q

What can elicit the release of oxytocin?

A

emotional state

45
Q

What effect does growth hormone have on pancreatic beta cells?

A

beta cells are stimulated

46
Q

How is insulin secretion affected by glucose metabolism/

A

insulin secretion is stimulated

47
Q

Osteocytic osteolysis is controlled by this hormone:

A

PTH

Physiology (55 decks)

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