Page 1 of 24
EXAM 1: BIOS256 / BIOS 256 (LATEST UPDATE 2025)
ANATOMY & PHYSIOLOGY IV WITH LAB | REVIEW
QUESTIONS WITH VERIFIED ANSWERS | 100%
CORRECT | GRADE A - CHAMBERLAIN
What does the enteric nervous system do?
.....ANSWER.....regulates motility of esophagus, stomach, and
intestines and secretion of digestive enzymes and acid.
The two instrinsic nerve plexuses serving the alimentary canal are
the what? .....ANSWER.....Submucosal and myenteric plexuses
submucosal plexus .....ANSWER.....controls secretions of glands
-innervates submucosa
myenteric plexus .....ANSWER.....regulates motility
-innervates smooth muscle layers
Deglutition .....ANSWER.....swallowing
,Page 2 of 24
phases of swallowing .....ANSWER.....Voluntary (buccal),
pharyngeal, esophageal
3 main cell types of stomach .....ANSWER.....goblet/ mucous cell
(mucus), parietal cell (HCL & Intrinsic factor), and chief cell
(pepsinogen)
Intrinsic factor .....ANSWER.....absorb Vitamin B12
HCI .....ANSWER.....hydrochloric acid;
PH= 1 OR 2
decreases ph of stomach and activates pepsinogen
Paneth cells .....ANSWER.....secrete enzymes that kill bacteria in
the small intestine
2 Exocrine Secretions of Pancreas .....ANSWER.....absorptive and
enteroendocrine cells
absorptive cell .....ANSWER.....digest and absorbs nutrients
, Page 3 of 24
enteroendocrine cells .....ANSWER.....secrete hormones (secretin,
CCK/ GIP)
Segmentation .....ANSWER.....localize secretions; movement in
small intestine and large intestine.
It is responsible for proper mixing of foods with gastric juice
secretions and breaking foods into small pieces.
*chyme sloshes back and forth as process continues*
*enteric pacemaker cells in muscularis externa set rhythm of
segmentation*
peristalsis and segmentation .....ANSWER.....two main types of
motility produced by the smooth muscle of the GI tract; can occur
together, in an alternating fashion
EXAM 1: BIOS256 / BIOS 256 (LATEST UPDATE 2025)
ANATOMY & PHYSIOLOGY IV WITH LAB | REVIEW
QUESTIONS WITH VERIFIED ANSWERS | 100%
CORRECT | GRADE A - CHAMBERLAIN
What does the enteric nervous system do?
.....ANSWER.....regulates motility of esophagus, stomach, and
intestines and secretion of digestive enzymes and acid.
The two instrinsic nerve plexuses serving the alimentary canal are
the what? .....ANSWER.....Submucosal and myenteric plexuses
submucosal plexus .....ANSWER.....controls secretions of glands
-innervates submucosa
myenteric plexus .....ANSWER.....regulates motility
-innervates smooth muscle layers
Deglutition .....ANSWER.....swallowing
,Page 2 of 24
phases of swallowing .....ANSWER.....Voluntary (buccal),
pharyngeal, esophageal
3 main cell types of stomach .....ANSWER.....goblet/ mucous cell
(mucus), parietal cell (HCL & Intrinsic factor), and chief cell
(pepsinogen)
Intrinsic factor .....ANSWER.....absorb Vitamin B12
HCI .....ANSWER.....hydrochloric acid;
PH= 1 OR 2
decreases ph of stomach and activates pepsinogen
Paneth cells .....ANSWER.....secrete enzymes that kill bacteria in
the small intestine
2 Exocrine Secretions of Pancreas .....ANSWER.....absorptive and
enteroendocrine cells
absorptive cell .....ANSWER.....digest and absorbs nutrients
, Page 3 of 24
enteroendocrine cells .....ANSWER.....secrete hormones (secretin,
CCK/ GIP)
Segmentation .....ANSWER.....localize secretions; movement in
small intestine and large intestine.
It is responsible for proper mixing of foods with gastric juice
secretions and breaking foods into small pieces.
*chyme sloshes back and forth as process continues*
*enteric pacemaker cells in muscularis externa set rhythm of
segmentation*
peristalsis and segmentation .....ANSWER.....two main types of
motility produced by the smooth muscle of the GI tract; can occur
together, in an alternating fashion
