What tissue lines the digestive tract?
Exam
- What tissue lines the digestive tract?
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cartilage
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muscular
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connective
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epithelium
2) Sphincters
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are only found at the beginning of the stomach.
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are muscles in longitudinal arrangement.
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prevent movement of material through the digestive tract.
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are smooth muscles.
3) A bolus is formed in the
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stomach.
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esophagus.
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small intestine.
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mouth.
4) During the process of swallowing, the
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epiglottis closes the trachea leading to the lungs.
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epiglottis seals the esophagus.
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esophagus is temporarily closed by the glottis.
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pharynx restricts food entry to the esophagus.
5) Which of the following functions does the stomach perform the LEAST?
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digestion
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storage
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mixing
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absorption
6) “Heartburn” is caused by
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chymotrypsin sloshing back into the esophagus.
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pepsin sloshing back into the esophagus.
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intrinsic factor sloshing back into the esophagus.
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HCl sloshing back into the esophagus.
7) Of the following parts of the GI tract, the greatest amount of nutrient absorption takes place in the
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small intestine.
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colon.
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stomach.
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pancreas.
8) The main function associated with the structure of villi and microvilli is
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trapping bacteria.
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secreting digestive enzymes.
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secreting hormones.
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increasing surface area.
9) The liver functions to do all of the following EXCEPT
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remove toxins ingested in food.
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produce bile.
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produce glucagon.
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inactivate hormones.
10) The function of segmentation is to
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churn the food and mix the contents with the digestive tract.
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churn the food and mix the contents with the digestive tract and also bring the contents to the wall of the tract where they could be absorbed.
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move the food through the digestive tract.
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produce a wavelike push of the gut contents through the system.
11) Which hormones slow down stomach emptying?
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gastrin and somatostatin
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leptin and gastrin
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somatostatin and secretin
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secretin and cholecystokinin
12) The large intestine begins as the
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duodenum
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cecum
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appendix
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ileum
13) Sodium, potassium, and calcium are referred to as
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acids.
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bases.
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nonelectrolytes.
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electrolytes.
14) An enzyme produced by the kidneys that helps to regulate blood pressure is
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aldosterone.
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renin.
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erythropoietin.
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angiotensin.
15) Most of the filtrate produced at the glomerulus is reabsorbed by the
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peritubular capillary.
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distal tubules.
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proximal tubules.
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loop of Henle.
16) What amount of the fluid removed from the blood is eventually returned to the blood?
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almost 99 percent
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about 59 percent
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less than 90 percent
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a mere 0.9 percent
17) The antidiuretic hormone
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is produced by the anterior pituitary gland.
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acts on the proximal tubules of nephrons in the kidney.
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promotes processes that lead to an increase in the volume of urine.
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promotes processes that lead to a decrease in the volume of urine.
18) If blood pH falls outside of the normal range for too long, which system suffers most?
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skeletal system
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muscular system
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central nervous system
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cardiovascular system
19) Severe vomiting or dehydration and overuse of antacids may bring about which condition?
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respiratory acidosis
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respiratory alkalosis
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metabolic alkalosis
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metabolic acidosis
20) Which hormone causes less sodium and less water to be excreted in the urine?
(1pts)
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ADH
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aldosterone
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insulin
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angiotensin
