human form and fucntion chapter 16 post test
As feces fills and stretches the rectal wall, the defecation reflex is triggered, causing: A. external anal sphincter relaxation B. external anal sphincter contraction C. internal anal sphincter contraction D. rectal wall contraction
A
Most of the food is digested in which organ? A. small intestine B. esophagus C. large intestine D. stomach
A
The pancreas excretes this enzyme to digest fat in the small intestine. A. carbohydrase B. proteinase C. nuclease D. lipase
A
The root of the tooth is held in place by these fibers. A. fibers of the periodontal ligament B. gingival fibers C. bony socket fibers D. cementum fibers
A
The submucosa is composed of soft connective tissue and contains ____. A. nerve endings B. Peyer patches C. blood vessels D. all of the above
A
The three regions of the small intestine include: A. duodenum, jejunum, and ileum B. duodenum, jejunum, and cecum C. jejunum, ileum, and cecum D. duodenum, ileum, and rectum
A
This region of the stomach performs most of the digestion. A. pylorus B. body C. fundus D. cardiac
A
Constipation is a result of this. A. delayed defecation reflex B. insufficient water reabsorption in the large intestine C. slow movement of stool through the large intestine D. hardening of the rectal wall
B
How does the peritoneum differ from other serous membranes? A. This membrane covers the retroperitoneal organs. B. This membrane surrounds all of the peritoneal organs. C. This membrane includes mesentery extensions that drape over the abdominal organs. D. This membrane includes the adventitia.
B
What protects the lining of the stomach from acid? A. parietal mucus B. alkaline mucus C. parietal cells D. acidic mucus
B
Which sphincter regulates the rate at which digested food enters the small intestine, allowing only small amounts at a time? A. lower esophageal sphincter B. pyloric sphincter C. pharyngoesophageal sphincter D. ileocecal sphincter
B
Why is digestion necessary? A. Digestion maintains the integrity of food. B. Digestion aids in the absorption of nutrients. C. Digestion expands the rugae in the stomach wall. D. Digestion triggers peristalsis of the esophagus.
B
The intestinal phase begins when chyme enters this part of the alimentary canal, signaling the release of hormones, which cause a decrease in gastric juice production. A. pylorus B. jejunum C. duodenum D. fundus
C
The mechanical action of mixing chyme and digestive juices in the small intestine is called: A. excretion B. salivation C. segmentation D. peristalsis
C
The small intestine absorbs about 80% of the ingested nutrients because the intestinal wall has circular folds, villi, and microvilli. How do the circular folds, villi, and microvilli aid in absorption? A. They increase the surface area of the wall. B. They inhibit the uptake of liquids. C. They help move digested food quickly through the small intestine. D. They possess large pores.
C
This is the type of process that involves the use of enzymes to break down food into small molecules. A. nutritional process B. chemical process C. mechanical process D. physical process
C
Which cells produce digestive enzymes in the small intestine? A. endocrine cells B. mucous cells C. exocrine cells D. chief cells
C
Which organ is known as the temporary holding area for ingested food? A. small intestine B. esophagus C. mouth D. stomach
C
Salts found in bile break up fat. Another name for this action is: A. neutralization B. transformation C. chemical destruction D. emulsification
D
The large intestine: A. runs parallel to the small intestine B. is covered by the small intestine C. is completely located below the small intestine D. borders the small intestine
D
The liver destroys old blood cells, causing elimination of this product in the bile. A. uric acid B. carbon dioxide C. lactic acid D. bilirubin
D
The stomach regulates the rate at which this heavy, cream-like liquid enters the small intestine. A. lacteal B. lipase C. ptyalin D. chyle
D
This enzyme does not digest disaccharides (double sugars). A. peptidase B. lactase C. maltase D. sucrase
D
This is the longest organ of the digestive system. A. large intestine B. colon C. esophagus D. small intestine
D
What causes the change in the mucosal lining seen in peptic ulcer disease? A. excess excretion of sodium bicarbonate B. increase in mucus production C. decrease in HCL production D. excess acid production
D
Which hormone stimulates the release of digestive products from both the pancreas and gall bladder? A. cholecystokinin B. gastrin C. albumin D. insulin
D
Which is true of the large intestine? A. It ingests food products. B. It is lined with villi, which aid in nutrient absorption. C. It is primarily responsible for the digestion of food. D. It prepares waste products for excretion.
D
Why are blood vessels found in the pulp cavity? A. to keep the tooth connected to the bony socket B. to provide tooth sensation C. to provide nutrients D. to prevent bacteria from coming in contact with the tooth
D'
