Osteoporosis is brought about by a lack of protein in a person's diet

In the context of the action potential, all of the following are consequences of the all-or-none law EXCEPT that

a. if the threshold is not reached, no action potential occurs. b. the size of the action potential does not diminish along the length of the axon. c. once started, the action potential needs no outside stimulation to keep going. d. the size of the action potential varies as a function of the intensity of stimulation.

Which of the following generally acts to conserve the body's energy?

A) CNS B) PNS C) sympathetic nervous system D) parasympathetic nervous system E) somatic nervous system