EXAM II Clicker Qs

Question 1

Interstitial cells of Cajal are associated with which function?

Answer 1

Pacemaker activity for smooth muscle

Question 2

Voluntary stage of swallowing ends at what point?

a. Mouth
b. Esophagus
c. Pharynx
d. Stomach
e. Duodenum

Answer 2

Pharynx

Question 3

T/F Meissner’s/submucosal plexus controls mainly GI secretion, absorption, and local blood flow

Answer 3

True

Myenteric plexus controls GI movement bc it sits between longitudinal and circular muscle layers of the GI walls

Question 4

T/F Spike potentials occur automatically when resting membrane potential of GI smooth muscle becomes more negative than -40mV

Answer 4

False; more POSITIVE

Question 5

Interstitial cells of Cajal are associated with which of the following functions?

a. Pacemaker activity of smooth muscle cells
b. Secretory activity of intestinal mucosa
c. Inhibition of stomach motility and secretion
d. Opening of K+ channel during intestinal contraction

Answer 5

Pacemaker activity of smooth muscle cells