Transcript No Slide Title

Oral Cavity
&
Esophagus
Stomach
Small &
Large
Intestines
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Phun wih
Potpourri
pH
Mechanical digestion in the
mouth results in a ball of food
that can be swallowed. What is
this ball of food called?
A: Bolus
What is the name for the
rhythmic contractions or muscle
movements of the esophagus?
A. Peristalsis
Double Jeopardy
Why is it important that our
mouth be wet or moist in order to
taste food?
Where is the epiglottis and what
does it do?
A. Lower portion of the pharynx
and it prevents food from
entering the wind pipe
What is the name of the enzyme
that begins the digestion of
polysaccharides?
A. Salivary Amylase
What is the mixture called that is
released from the stomach into
the duodenum?
A. Chyme
What is the name of the structure
that prevents the acid in your
stomach from coming up your
esophagus?
A. Cardiac sphincter
Name the three secretory cells
that line the stomach
A. mucus, parietal, peptic / chief
An accumulation of what bacteria
can cause stomach ulcers?
A. Helicobacter pylori
What do peptic cells secrete, and
what is the fate of that protein?
A. Peptic cells secrete
pepsinogen which is activated by
HCl to become pepsin
What is the name of the first
30cm of the small intestine?
A. Duodenum
What are the enzymes called that
digest fats?
A. Lipases
Which enzyme completes the
final stage of protein digestion?
A. Erepsin
What enzyme activate
Trypsinogen?
A. Enterokinase
What role do bile salts play in
digestion?
A. Emulsify fats to increase
surface area
What is the average pH of the
stomach?
A. pH of stomach is between 1
and 3
How is the acid from the stomach
neutralized?
A. Bicarbonate ions from the
pancreas
What would be the ideal pH for
the enzymes pepsin and trypsin?
A. Pepsin would be ~2 and
Trypsin would be ~7
At what pH does catalase
function best?
A. approx. 7
Bile helps counteract the pH of
digested lipids. Would the bile
be an acid or a base?
A. Bile is slightly basic
Which muscle separates the
thoracic cavity from the
abdominal cavity?
A. Diaphragm
Identify 3 enzymes that help to
digest carbohydrates?
A. Any three of amylase, maltase,
sucrase, lactase
Name the microstructure that
increases the surface area in the
small intestine
A. Villi
Why is the buildup of cellulose
important in the colon / large
intestine?
A. Distends rectum, causing
bowel movements
Identify unique features of
skeletal muscle that differentiate
it from other muscle types
A. Many nuclei, striated, moves
muscles (observable)