Ch20 Mechanism of Hormonal Regulation Flashcards
0
Q
- A major feature of the “plasma membrane receptor” mechanism of hormonal action is:
a. receptors exist for lipid-soluble hormones
b. increased lysosomal activity
c. that a “second messenger” is required
d. that hormones attach to a receptor in the cortisol
A
c. that a “second messenger” is required
1
Q
- Organs that respond to a particular hormone are called:
a. target organs
b. integrated organs
c. responder organs
d. hormone attack organs
A
a. target organs
2
Q
- A major feature of the “activation of genes” mechanism of hormonal action is that:
a. a “second messenger” is used
b. a hormone-Golgi complex is used
c. the hormone enters the cell
d. lysosomal activity increases
A
c. the hormone enters the cell
3
Q
- A hormone that has an antidiuretic effect similar to antidiuretic hormone (ADH) is:
a. insulin
b. oxytocin
c. growth hormone (GH)
d. aldosterone
e. adrenocorticotropic hormone (ACTH)
A
b. oxytocin
4
Q
- The hypothalamus controls the adenohypophysis by the direct involvelment of:
a. nerve impulses
b. prostaglandins
c. cerebrocortical controlling factors (CCCFs)
d. regulating hormones
A
d. regulating hormones
5
Q
- Amylin
a. is a lipid hormone
b. has an anti-hyperglycemic effect
c. depresses glucagon secretion after meals
d. None of the above is correct
A
b. has an anti-hyperglycemic effect
6
Q
- If calcium levels in the blood are too high, thyrocalcitonin (calcitonin) concentrations in the blood should:
a. increase, thereby inhibiting osteoclasts
b. increase, thereby stimulating osteoclasts
c. increase, but this would not affect osteoclasts
d. decrease, thereby inhibiting osteoclasts
e. decrease, thereby stimulating osteoclasts
A
a. increase, thereby inhibiting osteoclasts
7
Q
- In the negative feedback mechanism that controls thyroid hormone secretion, which of the following is the nontropic hormone?
a. Thyrotropin-releasing hormone (TRH)
b. Thyroid-stimulating hormone (TSH)
c. Thyroxine
d. All the above
A
c. Thyroxine
8
Q
- The control of parathyroid hormone is most accurately described as:
a. negative feedback controlled by the hypothalamus
b. positive feedback controlled by the pituitary gland
c. negative feedback involving the pituitary gland
d. negative feedback not involving the pituitary gland
A
d. negative feedback not involving the pituitary gland
9
Q
- The renin-angiotensin-aldosterone system begins to operate when renin is secreted by the:
a. adrenal cortex
b. adrenal medulla
c. pancreas
d. kidneys
A
d. kidneys
10
Q
- The effects of adrenal medullary hormones & the effects of the sympathetic stimulation can be described as:
a. opposites in all respects
b. overlapping in some respects
c. opposites in some respects
d. variable depending on the sex of the person involved
e. overlapping in most respects
A
e. overlapping in most respects
11
Q
- Which of the following BEST describes the respective effects of insulin & glucagon on blood sugar?
a. Insulin raises it, glucagon lowers it
b. Both raise blood sugar
c. Insulin lowers it, glucagon raises it
d. Both lower blood sugar
e. None of the above
A
c. Insulin lowers it, glucagon raises it
12
Q
- Mediators of the anabolic function of GH include:
a. insulin growth factor (IGF)-2 receptor
b. somatostatin
c. melatonin
d. IGFs
A
d. IGFs
13
Q
- Which of the following s an anabolic protein hormone?
a. TSH
b. Aldosterone
c. Follicle stimulating hormone (FSH)
d. insulin
A
d. insulin
14
Q
- Aldosterone maintains electrolyte balance by:
a. retaining potassium
b. eliminating sodium
c. retaining both Na & K
d. Both a & b are correct
e. None of the above
A
e. None of the above
