Comprehension 40 Verified and
Approved Solutions.
PNVN 1521Chapter 5 Nutrition
Comprehension 40 Verified and
Approved Solutions.
Peristalsis - ANSWER The rate or rhythm in which the food moves through the muscles is known as
what?
Muscles - ANSWER Through the GI wall, the production of various contractions, relaxations, and
movements are all conducted through this portion of the GI wall?
Hint: "The orchestra that plays the music"
Nerves - ANSWER The component that controls the rate of contractions, coordinates the movement of
the food, as well as the muscle tone within the GI
Hint: "The conductor that CONDUCTS the orchestra"
Hydrochloric Acid - ANSWER This, along with appropriate buffers produce pH in the stomach necessary
for enzyme activity
Bile - ANSWER A substance that breaks up fat particles and is stored in the gallbladder
Mastication, Amylase, Lipase, Mucus - ANSWER The first step in mechanical digestion. The process of
chewing and disintegrating food
During chemical digestion, the enzyme that breaks down starch, an enzyme released by the von Ebner's
glands, as well as a slimy, lubricated medium to assist in swallowing are released here
, PNVN 1521Chapter 5 Nutrition
Comprehension 40 Verified and
Approved Solutions.
Swallowing - ANSWER The second step in mechanical digestion where the tongue assists in moving food
from the mouth and into the esophagus
Gastroesophageal Sphincter - ANSWER The entrance of the stomach where food is introduced to a one-
way valve that constricts the food and preps it for digestion
Fundus - ANSWER The top portion of the stomach where food is introduced first as a solid is?
Antrum, Chyme - ANSWER The lower portion of the stomach where food has been converted into a
liquid substance known as _________
Pyloric Valve - ANSWER The exit point of the stomach where the chyme is released slowly into the
duodenum of the small intestine
Pepsin - ANSWER Pepsinogen is is secreted by the stomach and is activated through Hydrochloric Acid to
produce this enzyme that splits proteins
Pendulum - ANSWER This kind of movement present in mechanical digestion of the small intestine stirs
the chyme
Segmentation - ANSWER This kind of movement present in mechanical digestion of the small intestine
chops the food into lumps
Longitudinal - ANSWER This kind of movement present in mechanical digestion of the small intestine
rolls the food in a spiral motion to expose it for absorption
Surface Villi - ANSWER Hairlike projectiles in the small intestine expose the nutrients for absorption by
stirring them