Wiley Digestive System

Which of the following statements is correct? Gastrin stimulates production of large amounts of gastric juice. Gastrin strengthens contraction of the lower esophageal sphincter and relaxes the pyloric sphincter. Gastrin increases motility in the stomach. All of these statements are correct.

All of these statements are correct

All of the following are brush border enzymes except alpha-dextrinase. sucrase. amylase. lactase.

Amylase

Which of the following cells secretes intrinsic factor?

C

Which of the following can be absorbed in the intestinal villi by facilitated diffusion? Fructose Galactose Sucrose Glucose

Fructose

Which structure regulates the flow of material into the colon? Ileocecal sphincter Pyloric sphincter Appendix Sigmoid colon Anal canal

Ileocecal sphincter

Which of the following statements is INCORRECT? The tongue is in direct contact with ingested food, but is still considered to be an accessory digestive organ. The esophagus is a muscular tube that is considered to be part of the gastrointestinal tract. The salivary glands are accessory digestive organs that secrete digestive enzymes into the oral cavity. The gallbladder is a hollow muscular organ that is considered to be part of the alimentary canal. The liver is an accessory digestive organ that produces secretions that flow into the small intestine.

The gallbladder is a hollow muscular organ that is considered to be part of the alimentary canal.

Which of the following statements is FALSE? The upper esophageal sphincter contains smooth muscle. The upper esophageal sphincter controls movement of food from the pharynx into the esophagus. The lower esophageal sphincter contains smooth muscle. The lower esophageal sphincter controls movement of food from the esophagus into the stomach. Gastroesophageal reflex disease may be due to a defect in the lower esophageal sphincter.

The upper esophageal sphincter contains smooth muscle.

Which cell zones of a hepatic acinus are closest to the portal triad? Zone 1 Zone 2 Zone 3 all answers are correct

Zone 1

Peristalsis is a voluntary reflex. a long reflex. a local reflex. none of these.

a local reflex

Which of the following statements about gastrointestinal reflex pathways is correct? They regulate GI secretion and motility in response to stimuli present in the lumen of the GI tract. They involve sensory receptors and chemoreceptors whose axons synapse with neurons in the ENS, CNS, or ANS. They involve neurons of the ENS, CNS or ANS and activate or inhibit GI glands and smooth muscle, altering GI secretion and motility. All of these statements are correct.

all of these statements are correct

The parotid glands are found in the tongue. between the skin and the masseter muscle. in the floor of the mouth. beneath the tongue. in the palate.

between the skin and the masseter muscle.

In order from the small intestine to the anus, the major regions of the large intestine are ascending colon, sigmoid colon, transverse colon, descending colon, cecum, rectum, anal canal cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, anal canal ascending colon, transverse colon, sigmoid colon, descending colon, cecum, anal canal, rectum cecum, ascending colon, transverse colon, descending colon, sigmoid colon, anal canal, rectum ascending colon, transverse colon, sigmoid colon, descending colon, anal canal, cecum, rectum

cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, anal canal

CCK can close the pyloric sphincter. increase gastric emptying. inhibits the release of lipases. all of these.

close the pyloric sphincter

The mesentery binds the transverse and sigmoid colon to the posterior abdominal wall. attaches the liver to the anterior abdominal wall and diaphragm. drapes over the transverse colon and coils of the small intestine. extends from the posterior wall to wrap around the small intestine. suspends the stomach and duodenum from the liver.

extends from the posterior wall to wrap around the small intestine.

The highly permeable blood capillaries of the liver are called hepatic laminae. bile canaliculi. hepatic sinusoids. portal triads. hepatic acini.

hepatic sinusoids.

The pancreatic duct unites with the common bile duct and enters the duodenum at the _______. accessory duct insula of reil haustra hepatopancreatic ampulla santorini ampulla

hepatopancreatic ampulla

The gastrocolic reflex initiates mass peristalsis. intensifies peristalsis in the ileum. forces chyme into the cecum. is initiated by secretion of gastrin. occurs segmentally in the haustra.

initiates mass peristalsis.

Lipids are typically transported from the intestine into the bloodstream via capillaries. cell-to-cell transport. lacteals. all of these.

lacteals.

Which is NOT a major salivary gland? lingual glands parotid glands submandibular glands sublingual glands all of these choices are major salivary glands

lingual glands

Which of the following accessory organs produces a fluid that functions to emulsify dietary fats? Teeth Salivary glands Liver Gallbladder Pharynx

liver

The absorptive ability of the large intestine is enhanced by the presence of villi. microvilli. circular folds. villi and microvilli are correct. villi, microvilli, and circular folds are correct.

microvilli

Which of the following is NOT a primary function of the large intestine? Mechanical digestion Chemical digestion Absorption Feces formation Regulation of blood glucose

regulation of blood glucose

Brunner's glands Secrete an acidic mucus Secrete an alkaline juice Secrete an alkaline mucus Secrete an acidic juice Secrete a pH neutral juice

secrete an alkaline mucus

Which hormone functions to counteract the effect of gastric acid in the small intestine? Pepsin Secretin Gastrin Cholecystokinin Amylase

secretin

The enteroendocrine cells of the small intestine secrete lysozyme. secretin, CCK, and GIP. alkaline mucus. brush-border enzymes. chylomicrons.

secretin, CCK, and GIP.

Which attaches the liver to the anterior abdominal wall? the greater omentum the lesser omentum mesentery the falciform ligament the mesocolon

the falciform ligament

Secretin stimulates all of the following except the release of bicarbonate. the release of protease enzymes. the inhibition of gastric acid secretion. none of these.

the release of protease enzymes.

Which of the following statements is INCORRECT? Monosaccharides, amino acids, and short chain fatty acids pass into blood capillaries and are carried via the blood to the liver. Long chain fatty acids are formed into from micelles. Micelles ferry long chain fatty acids to absorptive cells where chylomicrons are formed. Chylomicrons are carried to the liver by the blood.

Chylomicrons are carried to the liver by the blood.

Which of the following statements is INCORRECT? Rugae are large folds of the stomach mucosa. Surface mucous cells and mucous neck cells secrete mucous which is protective in function. Chief cells secrete pepsinogen and gastric lipase. Parietal cells secrete intrinsic factor and hydrochloric acid. G cells secrete cholecystokinin into the blood stream.

G cells secrete cholecystokinin into the blood stream.

Which structure is composed of prominent lymphatic nodules that function in the immune response? Mucosa Lamina propria MALT Submucosa Serosa

MALT