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16 notecards = 4 pages (4 cards per page)

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Digestive System True False, Chapter 23 Besaw

front 1

Amino acid absorption is coupled to the active transport of sodium.

back 1

False

This makes amino acid absorption ATP-dependent

front 2

Bile enzymatically digests fats and related lipids.

back 2

True

Bile is an emulsifying agent, not an enzyme.

front 3

The defecation reflex is mediated by a sympathetic spinal cord reflex.

back 3

False

The reflex is parasympathetic.

front 4

In addition to gastrin, ACh and histamine regulate the release of HCl from parietal cells.

back 4

True

Gastrin is secreted by G cells, ACh comes from the parasympathetic nerve fibers, and histamine is released by enterochromaffin-like cells. All three stimulate parietal cells.

front 5

Portal triads contain a branch of the hepatic artery, hepatic portal vein, and bile duct.

back 5

True

Triads have a branch of the hepatic artery, a branch of the hepatic portal vein, and a bile duct.

front 6

Protein digestion begins in the oral cavity under the action of salivary peptidase.

back 6

False

Protein digestion begins in the stomach under the action of pepsin.

front 7

The pancreas is a retroperitoneal organ.

back 7

True

As a retroperitoneal organ, the pancreas adheres to the dorsal abdominal wall, loses its mesentery, and comes to lie posterior to the peritoneum during development

front 8

The pyloric sphincter regulates passage of chyme from the stomach into the duodenum.

back 8

True

The pyloric sphincter or valve controls stomach emptying (pylorus = gatekeeper).

front 9

The vermiform appendix essentially has no purpose.

back 9

False

The appendix is considered to be a lymphoid structure, and serves as a storehouse of bacteria to recolonize the gut when needed.

front 10

Tooth enamel is the hardest substance in the body.

back 10

True

Enamel is the hardest substance in the body, as it is heavily mineralized with calcium salts, and its densely packed hydroxyapatite (mineral) crystals are oriented in force-resisting columns perpendicular to the tooth's surface.

front 11

The hepatopancreatic ampulla is composed of the pancreatic duct and the lesser hepatic duct.

back 11

True

The bile duct and the pancreatic duct form the ampulla.

front 12

The order of the large intestines is: cecum, ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon.

back 12

True

front 13

The submucosa is in direct contact with food.

back 13

False

The mucosa is the innermost lining of the digestive tract.

front 14

Digested fats are absorbed into intestinal capillaries.

back 14

True

Digested fats are absorbed into lymphatic lacteals.

front 15

The submucosal plexus controls the motility of the digestive tract.

back 15

True

The myenteric plexus controls smooth muscle.

front 16

An adult has 20 teeth

back 16

False

There are 20 primary teeth, but usually 32 permanent teeth.