If the ________ nerves to the heart are cut, the heart rate will ________.
A) sympathetic; decrease
B) sympathetic; increase
C) parasympathetic; decrease
D) parasympathetic; increase
Answer: D) parasympathetic; increase
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One function of semen is to buffer the acidic secretions of the vagina.
Answer the following statement true (T) or false (F)
The gray matter of the brain houses motor neuron and interneuron cell bodies, dendrites, telodendria, and unmyelinated axons
Indicate whether this statement is true or false.
When comparing action potentials to graded potentials, an/two important distinguishing characteristic/s is/are
A) graded potentials can undergo summation. B) action potentials can undergo summation and the rate of action potentials is limited by the refractory period. C) action potentials can undergo summation. D) graded potentials can undergo summation and the rate of action potentials is limited by the refractory period. E) that the rate of action potentials is limited by the refractory period.
Epinephrine and norepinephrine
a. have a generalized vasoconstrictor effect. b. promote vasodilation of blood vessels supply muscles. c. promote mobilization of stored carbohydrates. d. dilate respiratory airways. e. none of these.