____________ is the close physical and emotional contact between parent and child

The primary feature of a neuron that prevents the action potential from traveling back from where it just passed is the ____

a. concentration gradient b. refractory period c. sodium potassium pump d. phospholipid bilayer

In the context of the general adaptation syndrome, which of the following is true of the fight-or-flight reaction?

A) It stems from a period in human prehistory when many stressors were life threatening. B) It involves the slowdown of the heart rate. C) It stems from a sudden lack of sugar in the blood. D) It is accompanied by a deceleration of the respiration rate.