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A&P Chapter 16

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A&P Chapter 16
Ch. 16 A&P

1.Chemical substances secreted by cells into the extracellular fluids and that regulate the metabolic function of other cells in the body are called ________.

Hormones

2.Direct gene activation involves a second-messenger system.

False

3.All peptide hormone synthesis requires gene activation that produces mRNA.

T

4.Which of the following is not a change that may be caused by hormonal stimulus?

a change in membrane potential

direct control of the nervous system

the stimulation of a genetic event resulting in protein synthesis

an increase in enzymatic activity

direct control of the nervous system

5.The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on ________.

the presence of the appropriate receptors on the cells of the target tissue or organ

6.Thyroid hormone (a small iodinated amine) enters target cells in a manner similar to ________.

steroid hormones, because both diffuse easily into target cells

7.What ion is sometimes used as a second messenger of amino acid–based hormones?

Calcium

8.Both "turn on" factors (hormonal, humoral, and neural stimuli) and "turn off" factors (feedback inhibition and others) may be modulated by the activity of the nervous system.

T

9.Virtually all of the protein or amino acid-based hormones exert their effects through intracellular ________.

Second messengers

10.Which of the following is not a type of hormone interaction?

synergism

feedback

antagonism

permissiveness

feedback

11.Which of the following is not a change typically produced by a hormonal stimulus?

induces secretory activity

stimulates production of an action potential

activates or deactivates enzymes

alters plasma membrane permeability

stimulates production of an action potential

12.The second-messenger mechanism of hormone action

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