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
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