Professor Freeman calls on his student Maya to describe how the presence of myelin affects an action potential. Maya should respond with which of the following statements?
a. Current flows along the unmyelinated segments and action potentials propagate along the myelinated portions of the axon, decreasing the speed and efficiency of the action potential
b. Current flows under the myelin and action potentials propagate along the unmyelinated segments of the axon, decreasing the speed and efficiency of the action potential
c. Current flows along the unmyelinated segments and action potentials propagate along the myelinated portions of the axon, increasing the speed and efficiency of the action potential
d. Current flows under the myelin and action potentials propagate along the unmyelinated segments of the axon, increasing the speed and efficiency of the action potential
ANSWER:
d
You might also like to view...
A person who is ____ would be labeled "anal-expulsive."
a. overly dependent b. very gullible or easily fooled c. orderly and neat d. careless and sloppy
While Freud emphasized ____ motivation, Jung emphasized ____ motivation
a. ?social; biological b. ?sexual; spiritual c. ?learned; unlearned d. ?normal; abnormal
Children who have no friends usually have
A) undesirable personalities. B) overprotective parents. C) an androgynous gender identity. D) close relationships with siblings.
On average, homosexual men have more older brothers than heterosexual men
a. True b. False