Section 6 Exam Review

Question 1

Increase in plasma K+ concentration will lead to:

Answer 1

aldosterone secretion

Question 2

Activity of what results in iodination?

Answer 2

thyroid peroxidase

Question 3

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

Answer 3

T

Question 4

Main source of thyroid hormones in the plasma:

Answer 4

T4

Question 5

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

Answer 5

Distal collecting suct

Question 6

Effect of ADH on capillary hydrostatic pressure:

Answer 6

decreases

Question 7

When does ADH target the vasculature?

Answer 7

at higher levels

Question 8

What happens in response to an elevated calcium level?

Answer 8

an initial increase in phosphate excretion

Question 9

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

Answer 9

T

Question 10

What levels decrease if the infundibulum stalk is cut?

Answer 10

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

Question 11

What levels increase if the infundibulum stalk is cut?

Answer 11

secretion of prolactin and CRH

Question 12

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

Answer 12

PTH (osteocytic osteolysis)

Question 13

Hypoglycemia increases the secretion of:

Answer 13

cortisol, epinephrine, glucagon, growth hormone

Question 14

True or False? Hypoglycemia increases the secretion of somatostatin.

Answer 14

F

Question 15

What does the influence of glucose on insulin secretion require?

Answer 15

glucose metabolism within the islet cell

Question 16

How will a high protein meal affect growth hormone levels/

Answer 16

increased growth hormone

Question 17

List insulin sensitive cells:

Answer 17

fat, liver, and muscle

Question 18

What is the prevention of hypoglycemia primarily regulated by?

Answer 18

glucagon

Question 19

What does glucagon stimulate?

Answer 19

lipolysis in adipocytes

Question 20

Pituitary hormone that stimulates milk production by the mammary glands:

Answer 20

prolactin

Question 21

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

Answer 21

permissive

Question 22

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

Answer 22

bone

Question 23

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

Answer 23

PTH

Question 24

Which cells have calcitonin receptors?

Answer 24

osteoclasts

Question 25

Elevated plasma calcium levels are sensed by what cells?

Answer 25

chief cells

Question 26

Vitamin D intoxication results in:

Answer 26

elevated plasma calcium and phosphate

Question 27

Describe pathway if vitamin D levels are too high:

Answer 27

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.

Question 28

Premature closure of the epiphyseal plates could be caused by:

Answer 28

elevated levels of estrogen

Question 29

Product of the SRY gene:

Answer 29

testis determining factor

Question 30

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

Answer 30

T? (check)

Question 31

Affect of LH on Leydig cells:

Answer 31

tells them to secrete testosterone

Question 32

Role of the pituitary hormone FSH in males:

Answer 32

initiate sperm production in the testes

Question 33

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

Answer 33

ovulation

Question 34

Principal hormone secreted by the corpus luteum:

Answer 34

progesterone

Question 35

Mestruation is triggered by a drop in:

Answer 35

estrogen and progesterone

Question 36

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

Answer 36

bones

Question 37

Blood levels affected in hyperthyroidism:

Answer 37

undetectable TSH and elevated serum free T3

Question 38

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

Answer 38

maturing follicle

Question 39

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

Answer 39

ADH

Question 40

True or False? Oxytocin induces parturition.

Answer 40

F.

Question 41

Where is oxytocin produced?

Answer 41

in the paraventricular unclesu of the hypothalamus

Question 42

What can oxytocin prevent?

Answer 42

excessibv bleeding after placental delivery

Question 43

What type of relex oxytocin release?

Answer 43

neuro-endocrine reflex

Question 44

What can elicit the release of oxytocin?

Answer 44

emotional state

Question 45

What effect does growth hormone have on pancreatic beta cells?

Answer 45

beta cells are stimulated

Question 46

How is insulin secretion affected by glucose metabolism/

Answer 46

insulin secretion is stimulated

Question 47

Osteocytic osteolysis is controlled by this hormone:

Answer 47

PTH