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Oral Cavity & Esophagus. Stomach. Small & Large Intestines. Phun wih pH. Potpourri. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. - PowerPoint PPT Presentation
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Oral Cavity & Esophag
us
StomachSmall & Large
Intestines
Phun wih pH
Potpourri
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)
