Digestive System Mcq's

Digestive System

What is the digestive system?

 The body's breathing system
 The body's system of nerves
 The body's food-processing system
 The body's blood-transporting system

Digestion begins in the mouth. Which of the following statement is INCORRECT?

	The tongue aids in the digestion of the food.
	The saliva changes some of the starches in the food to sugar.
	The tongue keeps the food in place in the mouth while the food is being chewed.
	The digestive juices can react more easily with the food when chewed.

Where does food pass through between the mouth and the stomach?

 The gullet
 The rectum
 The small intestine
 The large intestine

Our throat divides into two separate tubes: the windpipe and the gullet. What prevents food from entering the windpipe?

 The uvula
The tongue
 The trachea
 The epiglottis

What happens when food reaches the stomach?

	Nothing. No digestion occurs in the stomach.
	The food moves quickly into the small intestine.
	Juices mix with the food and stomach muscles squeeze it.
	The food is completely digested and is absorbed by tiny blood vessels in the walls of the stomach.

Where does the partly-digested food (in liquid form) go after it leaves the stomach?

 The gullet
 The appendix
 The small intestine
 The large intestine

How does digested food finally reach the bloodstream?

	It passes through the gullet into the blood.
	It is absorbed into the blood through blood vessels.
	It is absorbed into the blood through the walls of the lungs.
	It passes from the small intestine into the large intestine, then into the blood.

The digestive system processes food into usable and unusable materials. The usable materials are sent to the body's cells as food. What happens to unusable materials?

 It goes into the pancreas to await disposal.
 It goes to the right ventricle to await disposal.
 It goes into the large intestine to await disposal.
 It goes into the small intestine to await disposal.

Solid waste leaves the body through the rectum then the anus. Liquid waste leaves the body after passing through the ...

 kidneys and bladder
 blood vessels and lungs
 large intestine and bowel
 small intestine and large intestine

Digestion takes place in a long tube-like canal called the alimentary canal, or the digestive tract. Food travels through these organs in the following order:

	Mouth, gullet, stomach, small intestine, large intestine and rectum
	Mouth, oesophagus, stomach, large intestine, small intestine and rectum
	Mouth, stomach, oesophagus, small intestine, large intestine and rectum
	Mouth, stomach, gullet, small intestine, large intestine and rectum

Which of the following does NOT manufacture digestive juices?

 Liver
 Kidneys
 Stomach
 Pancreas

The liver is located in the abdomen and performs many functions. Which of the following is NOT a function of the liver?

 Storing food
 Manufacturing insulin
 Producing digestive juices
 Healing itself when it is damaged

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1 Accessory digestive organs include
			A)	the pharynx.
			B)	the gallbladder.
			C)	the esophagus.
			D)	the large intestine.
2		Nervous control of the GI tract would be impaired by damage to the
			A)	mucosa.
			B)	muscularis.
			C)	submucosa.
			D)	serosa.
3		Digestive enzymes are not secreted into
			A)	the esophagus.
			B)	the mouth.
			C)	the small intestine
			D)	the stomach.
4		Pepsin would be missing from the stomach contents of a person lacking
			A)	chief cells.
			B)	enterochromaffin-like cells.
			C)	goblet cells.
			D)	parietal cells.
5		Damage to the fundus would have the greatest effect on
			A)	mucus secretion.
			B)	pepsinogen secretion.
			C)	gastrin secretion.
			D)	histamine secretion.
6		The chyme entering the small intestine
			A)	is very basic.
			B)	is buffered by pancreatic bicarbonate secretion.
			C)	has not undergone any digestive processes.
			D)	passes through the cardiac sphincter.
7		Damage to which of the following would affect fat but not protein or carbohydrate absorption?
			A)	The microvilli.
			B)	Brunner's glands.
			C)	The lacteals.
			D)	The goblet cells.
8		Diarrhea may occur as a result of
			A)	decreased Na+ reabsorption by the large intestine.
			B)	decreased osmolarity of chyme entering the large intestine.
			C)	damage to the intestinal mucosa due to bacterial enterotoxins.
			D)	active transport of sodium chloride due to gluten consumption.
9		Bile
			A)	is synthesized by the gall bladder.
			B)	is stored in hepatic sinusoids.
			C)	is solely comprised of bile salts.
			D)	is required for maximal fat digestion and absorption.
10		The liver is responsible for secretion of all of the following except
			A)	ampicillin.
			B)	conjugated steroids.
			C)	penicillin.
			D)	streptomyocin.
11		The pancreas
			A)	is resistant to proteolytic digestion because of pancreatic trypsin inhibitor.
			B)	secretes bicarbonate to buffer the chyme.
			C)	secretes enzymes required for digestion of all macromolecules.
			D)	all of the above.
12		Inhibiting the secretion of cholecystokinin would
			A)	stimulate gastric motility.
			B)	stimulate gallbladder contraction.
			C)	stimulate pancreatic enzyme secretion.
			D)	stimulate HCl secretion by parietal cells.
13		Gastric acid secretion during the intestinal phase
			A)	is stimulated by vagal stimulation.
			B)	is inhibited by fat in the chyme.
			C)	is stimulated by gastrin secretion.
			D)	is stimulated by amino acids in the stomach.
14		Cholesterol removal and degradation is the primary function of the
			A)	chylomicrons.
			B)	high-density lipoproteins.
			C)	low-density lipoproteins.
			D)	very-low-density lipoproteins.
15		Which of the following enzymes is not bound to epithelial membranes of the small intestine?
			A)	Sucrase.
			B)	Aminopeptidase.
			C)	Carboxypeptidase.
			D)	Maltase.

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1		Which gastrointestinal layer is characterized by having tough, fibrous connective tissue?
			A)	mucosa
			B)	submucosa
			C)	muscle
			D)	serosa
2		Which intestinal layer accounts for the action of the peristaltic waves?
			A)	serosa
			B)	muscularis
			C)	submucosa
			D)	mucous
3		The alimentary tube is around _____ meters long.
			A)	2
			B)	4
			C)	6
			D)	9
4		The _____ nervous system division usually stimulates and promotes digestion.
			A)	somatic
			B)	sympathetic
			C)	central
			D)	parasympathetic
5		The processes of chewing are referred to as _____.
			A)	churning
			B)	mastication
			C)	peristalsis
			D)	deglutition
6		The frenulum is the membrane attached to the inferior surface of the _____.
			A)	tongue
			B)	stomach
			C)	lips
			D)	liver
7		The following are true of the tongue except which one?
			A)	contains skeletal muscle
			B)	attaches to hyoid bone
			C)	attaches to temporal bone
			D)	contains papillae
8		The following areas contain tonsils except which one?
			A)	around the frenulum
			B)	oral pharynx
			C)	nasal pharynx
			D)	root of tongue
9		Which lymphatic areas are most commonly the site of inflammation?
			A)	Peyer's patches
			B)	palatine tonsils
			C)	lingual tonsils
			D)	adenoids
10		How many teeth will be produced in an average lifetime?
			A)	20
			B)	32
			C)	30
			D)	52
11		The term wisdom tooth refers to the _____ tooth.
			A)	incisor
			B)	third molar
			C)	second bicuspid
			D)	first cuspid
12		The portion of a tooth which lies within the mandible socket is called the _____.
			A)	dentin
			B)	crown
			C)	root
			D)	cementum
13		Which part of a tooth most closely resembles bone tissue?
			A)	enamel
			B)	cementum
			C)	dentin
			D)	gingiva
14		Which muscles constrict to prevent air from entering the esophagus during breathing?
			A)	superior constrictor
			B)	middle constrictor
			C)	inferior constrictor
			D)	esophageal
15		A hiatal hernia is a weakness in the _____ muscle, which allows a portion of the digestive tract to enter the thoracic cavity.
			A)	diaphragm
			B)	stomach
			C)	intestinal
			D)	thoracic wall
16		The _____ part of the stomach is the area the is connected to the esophagus.
			A)	cardiac
			B)	pyloric
			C)	fundus
			D)	body
17		The _____ prevents food from entering the small intestine.
			A)	cardiac sphincter
			B)	pyloric valve
			C)	ileo-colic valve
			D)	sphincter of Oddi
18		Gastric enzymes are secreted by the _____ cells.
			A)	chief
			B)	goblet
			C)	parietal
			D)	oxyntic
19		Proteins are digested or broken down by the _____ in the stomach.
			A)	pepsinogen
			B)	pepsin
			C)	hydrochloric acid
			D)	lipase
20		Parasympathetic stomach impulses cause all of the following except which one?
			A)	secretion of somatostatin
			B)	inhibition of somatostatin
			C)	secretion of gastrin
			D)	promotes histamine
21		Gastrin secretion will stop when the stomach pH reaches _____.
			A)	7.0
			B)	4.5
			C)	1.5
			D)	3.0
22		The alkaline tide occurs when _____ is excreted into the urine.
			A)	HCl
			B)	H+
			C)	bicarbonate ions
			D)	phosphate ions
23		What is the stimulus for cholecystokinin release?
			A)	chyme
			B)	lipids
			C)	protein
			D)	gastrin
24		What blocks pancreatic secretions from entering the duodenum?
			A)	pyloric valve
			B)	sphincter of Oddi
			C)	the common bile duct
			D)	cholecystokinin secretion
25		Which of the following triggers the formation of the others?
			A)	trypsin
			B)	enterokinase
			C)	carboxypeptidase
			D)	chymotrypsin
26		Proteins are split by all of the following pancreatic factors except which one?
			A)	zymogen
			B)	chymotrypsin
			C)	trypsin
			D)	carboxypeptidase
27		Pancreatitis is mainly the result of _____ activity.
			A)	bile
			B)	bacterial
			C)	carboxypeptidase
			D)	trypsin
28		Which of the following are not active in the duodenum?
			A)	nuclease
			B)	enterokinase
			C)	pepsin
			D)	amylase
29		Secretin from the duodenum causes the pancreas to produce secretions rich in _____.
			A)	proteolytic enzymes
			B)	amylase
			C)	lipase
			D)	bicarbonate
30		Which of these is a hormone name?
			A)	trypsin
			B)	ribonuclease
			C)	cholecystokinin
			D)	chymotrypsinogen
31		The hormone which causes the pancreas to secrete an enzyme rich fluid is _____.
			A)	cholecystokinin
			B)	secretin
			C)	enterogastrone
			D)	enterocrinin
32		Which organ has the most metabolically active cells?
			A)	pancreas
			B)	liver
			C)	stomach
			D)	small intestine
33		Urea is synthesized by the liver following _____ metabolism.
			A)	carbohydrate
			B)	protein
			C)	lipid
			D)	nucleic acid
34		Ferritin is a globular protein that transports and stores ______ in the liver and blood.
			A)	glycogen
			B)	lipids
			C)	vitamin B12
			D)	iron
35		Which of the following vitamins is not stored in the liver?
			A)	C
			B)	D
			C)	B12
			D)	A
36		The liver stores ______ for energy.
			A)	nucleic acids
			B)	glycogen
			C)	glucose
			D)	vitamins
37		Which of the following is not a function of the adult liver?
			A)	glycogen storage
			B)	detoxification
			C)	synthesis of clotting proteins
			D)	erythropoiesis
38		The liver contains special blood channels termed _____.
			A)	sinusoids
			B)	central vein
			C)	hepatic cells
			D)	portal veins
39		The falciform ligament separates the right from _____ lobe.
			A)	quadrate
			B)	left
			C)	caudate
			D)	pancreatic
40		Which organ produces and secretes bile?
			A)	liver
			B)	gallbladder
			C)	pancreas
			D)	duodenum
41		The Kupffer cells are phagocytic cells found in the _____.
			A)	gallbladder
			B)	pancreas
			C)	intestine
			D)	liver
42		The buildup of bile pigment in tissues that can be caused by gallstones is _____.
			A)	hyperbilirubinemia
			B)	obstructive jaundice
			C)	hepatitis
			D)	hepatocellular jaundice
43		Which of the following are liver waste products?
			A)	bilirubin
			B)	bile salts
			C)	cholesterol
			D)	electrolytes
44		The _____ duct directly receives the fluids from the gallbladder.
			A)	cystic
			B)	common bile
			C)	hepatic
			D)	common hepatic
45		The common bile duct is formed by the merger of the hepatic and _____ ducts.
			A)	common hepatic
			B)	cystic
			C)	pancreatic
			D)	Santorini
46		The ampulla of Vater is the area that joins the common bile duct to the _____ duct.
			A)	hepatic
			B)	pancreatic
			C)	cystic
			D)	common hepatic
47		Gallbladder stones are medically referred to as a _____ condition.
			A)	cholecystitis
			B)	cholecystectomy
			C)	cholelithiasis
			D)	cholesterol calculi
48		Bile facilitates digestion by causing the _____ of fats.
			A)	hydrolysis
			B)	digestion
			C)	catalysis
			D)	emulsification
49		Bile salts combine with fatty acids to form complexes called _____ that facilitate absorption.
			A)	chylomicrons
			B)	micelles
			C)	globules
			D)	lipoproteins
50		Which of these is a water soluble vitamin?
			A)	D
			B)	C
			C)	E
			D)	K
51		Which of the following acts to inhibit acid production?
			A)	secretin
			B)	somatostatin
			C)	cholecystokinin
			D)	gastrin
52		Which area has the greatest amount of enzyme activity?
			A)	duodenum
			B)	colon
			C)	jejunum
			D)	ileum
53		The shortest section of the intestines is the _____.
			A)	colon
			B)	duodenum
			C)	ileum
			D)	jejunum
54		The membrane that hangs like an apron over the intestines is the _____.
			A)	mesentery
			B)	visceral peritoneum
			C)	parietal peritoneum
			D)	greater omentum
55		The finger-like extensions inside the small intestine are called _____ and increase the surface area.
			A)	microvilli
			B)	villi
			C)	lacteals
			D)	lumens
56		The _____ are vessels that project into the villi and absorb fatty substances.
			A)	lacteals
			B)	lymphatics
			C)	veins
			D)	arteries
57		The following belong together except which one?
			A)	small intestine
			B)	large intestine
			C)	plicae circulares
			D)	crypts of Lieberkuhn
58		Which of these does not belong with the others?
			A)	lipase
			B)	sucrase
			C)	maltase
			D)	lactase
59		Which is the only area that can digest a double sugar?
			A)	jejunum
			B)	stomach
			C)	duodenum
			D)	pancreas
60		Amylase could be found in all of these areas except which one?
			A)	mouth
			B)	stomach
			C)	duodenum
			D)	pancreas
61		Most of the absorption of nutrients occurs in the _____.
			A)	colon
			B)	duodenum
			C)	jejunum
			D)	ileum
62		Fatty acids and glycerol are released when _____ are broken down by liver or muscle cells.
			A)	micelles
			B)	chylomicrons
			C)	lacteals
			D)	lipoproteins
63		Which of the following is not readily absorbed in the small intestine?
			A)	Na+
			B)	Cl-
			C)	K+
			D)	Mg++
64		The ileocecal valve prevents chyme from entering the _____.
			A)	large intestine
			B)	small intestine
			C)	stomach
			D)	duodenum
65		A peristaltic rush which results in a failure to absorb enough colon water results in _____.
			A)	constipation
			B)	diarrhea
			C)	cramps
			D)	flatus