The cerebral gyri increase

A) memory assimilation time.
B) the surface area of the cortex.
C) the size of the thalamic nuclei.
D) speech ability.
E) volume of the brain.

The third heart sound can be heard ________.

A) contraction of the atria
B) when the semilunar valves close
C) when the AV valves close
D) when blood flows into the ventricles

Which part of the sarcolemma contains acetylcholine receptors?

A) any part of the sarcolemma
B) motor end plate
C) end of a muscle fiber
D) none of the above

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ________ conduction.