Question

1.) the saliva secretion reflex:
a. can be activated by an extrinsic nerve network
b. is stimulated by the activity of mechanoreceptors in the mouth
c. is only activated by low ph foods
d. a and b are correct
e. a, b & e are correct

2. the basic electrical rhythm(BER) of the intestinal tract
a. is started by the extrinsic nerve nerve nerve pathway
b. only functions under parasympathetic regulation
c. causes the release of intestinal hormones
d. is created by pacesetter cells in the wall of the intestinal tract
e. is dependent on potassium for activity

Answer 1

1. The saliva secretion reflex

c. is only activated by low ph foods

2. The basic electrical rhythm (BER) of the intestinal tract

c. causes the release of intestinal hormones

(The cell membrane of pacemaker cell which is present in the intestine undergoes a rhythmic depolarization and repolarization that results in slow wave known as basic electrical rhythm and is transmitted to smooth muscle cells. This causes contraction and to allow contraction hormonal signal is required to induce the smooth muscle cells to have an action potential.)