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Bio 224
Exam 4 Respiratory and Digestion
21
Biology
Undergraduate 2
04/15/2013

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Term
Surfactant facilitates alveolar ventilation by
Definition
decreasing the surface tension between water molecules on the lining of the alveoli.
Term
During inspiration, contraction of the diaphragm causes the volume of Mr. Jones' thoracic cavity to increase and the pleural pressure to decrease. The pressure in his alveoli will
Definition
decrease below atmospheric pressure, causing air to move into his lungs.
Term
Physiological dead air space is anatomic dead space plus
Definition
the volume of any alveoli where gas exchange is diminished.
Term
As the result of an asthmatic attack,
Definition
ventilation is inadequate to oxygenate blood.
Term
During exercise, the oxygen-hemoglobin dissociation curve
Definition
shifts to the right.
Term
Mr. Jones has a blood pH of 7.00 and a temperature of 100.5 F. His oxygen-hemoglobin dissociation curve would
Definition
shift to the right, causing more oxygen to be released to his cells.
Term
Rhythmicity of breathing involves
Definition
the pre-Botzinger complex of the ventral respiratory group.
Term
Which of the following is NOT a type of propulsion in the digestive tract?
Definition
segmental contraction
Term
In order to remove a tumor in the muscular tunic of the stomach, a surgeon must cut through the
Definition
serosa.
Term
The enteric plexus
Definition
controls movement and secretion of the digestive tract.
Term
Beginning at the lumen, the sequence of layers of the digestive tract wall is
Definition
mucosa, submucosa, muscularis, serosa
Term
Which of the following attaches the liver to the anterior abdominal wall?
Definition
falciform ligament
Term
Pepsinogen
Definition
is packaged in zymogen granules.
Term
The gastric phase of gastric secretion
Definition
leads to the greatest volume of gastric secretion.
Term
Which of the following would stimulate gastric secretion?
Definition
gastrin
Term
Fatty acids and certain lipids in the duodenum initiate the release of
Definition
cholecystokinin (CCK).
Term
Enzymes secreted by the small intestine include
Definition
disaccharidases.
Term
What is the purpose of segmental contractions of the small intestine?
Definition
mixing of intestinal contents
Term
Which of the following enzymes is found in inactive form in pancreatic juice?
Definition
trypsin
Term
A proteolytic enzyme secreted by the pancreas is
Definition
chymotrypsin
Term
Chylomicrons
Definition
are synthesized in intestinal epithelial cells.
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