Chapter 20: Mechanisms of Hormonal Regulation

Question 1

Organs that respond to a particular hormone are called the:

a. target organs
b. integrated organs
c. responder organs
d. hormone attach organs

Answer 1

a. target organs

Question 2

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 cytosol

Answer 2

c. that a second messenger is required

Question 3

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

Answer 3

c. the hormone enters the cell

Question 4

A hormone that has an anti diuretic effect similar to antidiuretic hormone (ADH) is:

a. insulin
b. oxytocin
c. growth hormone (GH)
d. aldosterone
e. adrenocorticotropic hormone (ACTH)

Answer 4

b. oxytocin

Question 5

The hypothalamus controls the adenohypophysis by the direct involvement of:

a. nerve impulses
b. prostaglandins
c. cerebrocortical controlling factors (CCCF’s)
d. regulating hormones

Answer 5

d. regulating hormones

Question 6

Amylin:

a. is a lipid hormone
b. has an anti hyperglycemic effect
c. depresses glucagon secretion after meals
d. Non of the above is correct

Answer 6

b. has an anti hyperglycemic effect

Question 7

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 osteoclast
d. decrease thereby inhibiting osteoclasts
e. decrease, thereby stimulating osteoclasts

Answer 7

a. increase, thereby inhibiting osteoclasts

Question 8

In the negative feedback mechanism that controls thyroid hormone secretion, which of the following is the non tropic hormone:

a. Thyrotropin-releasing hormone (TRH)
b. Thyroid-stimulating hormone (TSH)
c. Thyroxine
d. All of the above are tropic hormones

Answer 8

c. Thyroxine

Question 9

The control of parathyroid hormone is most accurately described as:

a. negative feedback controlled by hypothalamus
b. positive feedback controlled by the pituitary gland
c. negative feedback involving the pituitary gland
d. negative feedback not involving the pituitary gland

Answer 9

d. negative feedback not involving the pituitary gland

Question 10

The renin-angiotensin-aldosterone system begins to operate when renin is secreted by the:

a. adrenal cortex
b. adrenal medulla
c. pancreas
d. kidneys

Answer 10

d. kidneys

Question 11

The effects of adrenal medullary hormones and the effects of 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

Answer 11

e. Overlapping in most respects

Question 12

Which of the following best describes the respective effects of insulin and 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 are correct

Answer 12

c. Insulin lowers it, glucagon raises it

Question 13

Mediators of the anabolic function of GH include:

a. insulin growth factor (IGH) - 2 receptors
b. Somatostatin
c. melatonin
d. IGFs

Answer 13

d. IGFs

Question 14

Which of the following is an anabolic protein hormone?

a. TSH
b. aldosterone
c. follicle stimulating hormone
d. insulin

Answer 14

d. insulin

Question 15

Aldosterone maints electrolyte balance by:

a. retaining potassium
b. eliminating sodium
c. retaining both sodium and potassium
d. both a & b are correct
e. none of the above is correct

Answer 15

e. none of the above is correct