Quiz 8: Ch 25 (McGraw Hill) | Quizlet

An example of chemical digestion is the breakdown of __________ into __________

nucleic acids; nucleotides

Which of the following is not an accessory organ of digestion?

Spleen

The serous membrane that suspends the stomach and intestines from the abdominal wall is called the __________.

mesentery

The small intestine is suspended from the abdominal wall by the __________

mesentery

__________ is a hormone, whereas __________ is an enzyme.

Secretin; pepsin

The surface of the tongue is covered with __________ stratified squamous epithelium, and has bumps called __________, where many taste buds can be found.

nonkeratinized; lingual papillae

Acid reflux into the esophagus ("heartburn") is normally prevented by __________.

the lower esophageal sphincter (LES)

Which of the following is the correct list of tooth anatomy from the most superficial to the deepest?

Enamel, dentin, pulp

Which of the following is not normally found in saliva?

Protease

The oral phase of swallowing is under __________ control and the pharyngo-esophageal phase is __________.

central nervous system; controlled by autonomic reflexes

The ___ regulates the flow of contents from the stomach to the duodenum.

pyloric sphincter

Necessary for Vitamin B12B12 absorption, __________ is/are secreted by __________ cells.

intrinsic factor; parietal

Pepsin is secreted as a zymogen __________

so it acts only in the stomach lumen and does not digest intracellular proteins

The enzyme that catalyzes the first step reaction in HCl production by gastric parietal cells is called __________

carbonic anhydrase

Which of the following occurs in response to chemical irritants or sensory stimuli?

Vomiting

The enterogastric reflex serves to __________

inhibit gastric motility when there is chyme in the small intestine

The ___ stores excess glucose and releases it into the blood when needed.

liver

The __________ synthesizes bile acids by metabolizing __________.

liver; cholesterol

Pancreatic enzymes are secreted in response to a hormone called __________.

cholecystokinin (CCK)

Which of the following is not associated with the large absorptive surface of the small intestine?0-2013

Rugae

Contact digestion takes place in/at the __________.

brush border of the small intestine

Lecithin prepares fats for hydrolysis by forming __________.

emulsification droplets

The three most abundant classes of nutrients are __________.

fats, proteins, and carbohydrates

Which of the following nutrients must be digested in order to be absorbed?

Proteins

Amino acids and monosaccharides are absorbed in the __________, and fatty acids are absorbed in the __________.

small intestine; small intestine

The muscle tone of the __________ along the colon contracts it lengthwise, causing its walls to bulge and form pouches called __________.

taeniae coli; haustra

Which of the following is true regarding the difference between the mucosa of the small and large intestines?

The large intestinal has deeper intestinal crypts than the small intestine.

Bacteria constitute about __________blank% of the dry weight of the feces.

30

The movement of colonic contents from one puckered section to another is called __________.

haustral contraction

Defecation is stimulated by __________.

stretching of the rectum