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Flashcards in Section 6 Exam Review Deck (47):
1

Increase in plasma K+ concentration will lead to:

aldosterone secretion

2

Activity of what results in iodination?

thyroid peroxidase

3

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

T

4

Main source of thyroid hormones in the plasma:

T4

5

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

Distal collecting suct

6

Effect of ADH on capillary hydrostatic pressure:

decreases

7

When does ADH target the vasculature?

at higher levels

8

What happens in response to an elevated calcium level?

an initial increase in phosphate excretion

9

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

T

10

What levels decrease if the infundibulum stalk is cut?

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

11

What levels increase if the infundibulum stalk is cut?

secretion of prolactin and CRH

12

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

PTH (osteocytic osteolysis)

13

Hypoglycemia increases the secretion of:

cortisol, epinephrine, glucagon, growth hormone

14

True or False? Hypoglycemia increases the secretion of somatostatin.

F

15

What does the influence of glucose on insulin secretion require?

glucose metabolism within the islet cell

16

How will a high protein meal affect growth hormone levels/

increased growth hormone

17

List insulin sensitive cells:

fat, liver, and muscle

18

What is the prevention of hypoglycemia primarily regulated by?

glucagon

19

What does glucagon stimulate?

lipolysis in adipocytes

20

Pituitary hormone that stimulates milk production by the mammary glands:

prolactin

21

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

permissive

22

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

bone

23

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

PTH

24

Which cells have calcitonin receptors?

osteoclasts

25

Elevated plasma calcium levels are sensed by what cells?

chief cells

26

Vitamin D intoxication results in:

elevated plasma calcium and phosphate

27

Describe pathway if vitamin D levels are too high:

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

Premature closure of the epiphyseal plates could be caused by:

elevated levels of estrogen

29

Product of the SRY gene:

testis determining factor

30

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

T? (check)

31

Affect of LH on Leydig cells:

tells them to secrete testosterone

32

Role of the pituitary hormone FSH in males:

initiate sperm production in the testes

33

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

ovulation

34

Principal hormone secreted by the corpus luteum:

progesterone

35

Mestruation is triggered by a drop in:

estrogen and progesterone

36

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

bones

37

Blood levels affected in hyperthyroidism:

undetectable TSH and elevated serum free T3

38

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

maturing follicle

39

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

ADH

40

True or False? Oxytocin induces parturition.

F.

41

Where is oxytocin produced?

in the paraventricular unclesu of the hypothalamus

42

What can oxytocin prevent?

excessibv bleeding after placental delivery

43

What type of relex oxytocin release?

neuro-endocrine reflex

44

What can elicit the release of oxytocin?

emotional state

45

What effect does growth hormone have on pancreatic beta cells?

beta cells are stimulated

46

How is insulin secretion affected by glucose metabolism/

insulin secretion is stimulated

47

Osteocytic osteolysis is controlled by this hormone:

PTH