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1
Impulses from motor neurons go to
A)effectors.
B)interneurons.
C)sensory neurons.
D)sensory receptors.
2
Sudden, involuntary responses to stimuli are called
A)action potential.
B)all-or-none response.
C)reflexes.
D)depolarization.
3
Hormones are carried through the body by
A)red blood cells.
B)plasma.
C)white blood cells.
D)endocrine glands.
4
The circulatory system exchanges matter with cells by
A)the arteries.
B)the veins.
C)the lymph.
D)the capillaries.
5
The function of nephrons is to
A)carry urine to the bladder.
B)excrete urine.
C)filter substances from the blood.
D)store urine.
6
In stressful situations, neurons in the sympathetic nervous system release
A)norepinephrine.
B)epinephrine.
C)dopamine.
D)serotonin.
7
The sympathetic and parasympathetic systems
A)have similar functions.
B)have opposing functions.
C)are both part of the somatic system.
D)control the central nervous system (CNS).
8
Reabsorption of filtrate in the nephron involves
A)active transport only.
B)passive transport only.
C)secretion.
D)both active and passive transport.
9
The body can increase heat loss by
A)constricting blood vessels in the skin.
B)shivering.
C)dilating blood vessels in the skin.
D)increasing blood pressure.
10
The body's specific immune system is a function of
A)lymphocytes.
B)plasma.
C)platelets.
D)lymph nodes.





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