Gastrointestinal Motility Quizzes: Test Your Understanding

Question 1

Which of the following is NOT a factor that influences gastrointestinal motility?

Accepted Answer

Blood pressure fluctuations

Answer

Smooth muscle contraction

Answer

Enteric nervous system activity

Answer

Hormonal regulation

Question 2

Which neurotransmitter increases gastrointestinal motility?

Accepted Answer

Acetylcholine

Answer

Norepinephrine

Answer

Dopamine

Answer

Serotonin

Question 3

What is the primary function of the sphincter of Oddi?

Accepted Answer

Control the flow of bile and pancreatic juice into the duodenum

Answer

Prevent reflux of duodenal contents into the stomach

Answer

Regulate the passage of food from the stomach to the duodenum

Answer

Prevent the entry of undigested food into the colon

Question 4

Which hormone inhibits gastric motility?

Accepted Answer

Glucagon-like peptide-1

Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Question 5

What type of muscle movements occur in the small intestine that mix and propel food?

Accepted Answer

Segmentation

Answer

Peristalsis

Answer

Haustration

Answer

Mass movements

Question 6

Which type of smooth muscle relaxation is NOT observed in the gastrointestinal tract?

Accepted Answer

Excitatory junction potential

Answer

Receptive relaxation

Answer

Adaptive relaxation

Answer

Electric control activity

Question 7

What is the primary purpose of gastrointestinal motility?

Accepted Answer

To propel food through the gastrointestinal tract

Answer

To mix food with digestive enzymes

Answer

To absorb nutrients from food

Answer

To eliminate waste products

Question 8

Which layer of the gastrointestinal tract generates electrical slow waves?

Accepted Answer

Muscularis externa

Answer

Mucosa

Answer

Submucosa

Answer

Serosa

Question 9

Which hormone stimulates gastric acid secretion?

Accepted Answer

Gastrin

Answer

Cholecystokinin (CCK)

Answer

Secretin

Answer

Glucagon-like peptide-1 (GLP-1)

Question 10

Which condition features impaired esophageal motility?

Accepted Answer

Achalasia

Answer

Gastroparesis

Answer

Ulcerative colitis

Answer

Crohn's disease

Question 11

What is the main function of the pyloric sphincter?

Accepted Answer

Controls the flow of chyme from the stomach into the duodenum

Answer

Prevents reflux of gastric contents into the esophagus

Answer

Produces bile

Answer

Absorbs nutrients

Question 12

Which of the following does NOT influence GI motility?

Accepted Answer

Age

Answer

Hormones

Answer

Neurotransmitters

Answer

Emotions

Question 13

Which of the following is the primary neurotransmitter released by excitatory motor neurons in the enteric nervous system?

Accepted Answer

Acetylcholine

Answer

Norepinephrine

Answer

Dopamine

Answer

Serotonin

Question 14

What is the primary inhibitory neurotransmitter in the enteric nervous system that regulates gastrointestinal muscle tone?

Accepted Answer

GABA

Answer

Acetylcholine

Answer

Noradrenaline

Answer

Serotonin

Question 15

Which hormone stimulates gastrointestinal motility, particularly in the stomach?

Accepted Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Answer

Somatostatin

Question 16

What is the primary role of the interstitial cells of Cajal in gastrointestinal motility?

Accepted Answer

Generate and propagate electrical impulses

Answer

Regulate smooth muscle tone

Answer

Inhibit enteric nervous system activity

Answer

Produce hormones

Question 17

Which condition is characterized by impaired esophageal motility, leading to difficulty swallowing?

Accepted Answer

Achalasia

Answer

Gastroesophageal reflux disease

Answer

Irritable bowel syndrome

Answer

Ulcerative colitis

Question 18

What is the main function of the migrating motor complex in the gastrointestinal tract?

Accepted Answer

Clearing unabsorbed nutrients and bacteria from the small intestine

Answer

Stimulating gastric acid secretion

Answer

Promoting bile flow

Answer

Inhibiting colonic motility

Question 19

Which technique is commonly used to measure electrical activity in the gastrointestinal tract and assess motility patterns?

Accepted Answer

Electrogastrography

Answer

Colonoscopy

Answer

Endoscopy

Answer

Ultrasound

Question 20

What is the primary function of the pyloric sphincter?

Accepted Answer

Control the flow of food from the stomach into the small intestine

Answer

Prevent reflux of gastric contents into the esophagus

Answer

Regulate bile flow from the gallbladder

Answer

Inhibit pancreatic enzyme secretion

Question 21

Which drug is commonly used to treat gastroparesis, a condition characterized by delayed gastric emptying?

Accepted Answer

Metoclopramide

Answer

Ondansetron

Answer

Trimebutine

Answer

Cisapride

Question 22

How does peristalsis differ from segmentation in the gastrointestinal tract?

Accepted Answer

Peristalsis involves coordinated muscle contractions that propel food forward, while segmentation mixes and breaks down food

Answer

Peristalsis occurs only in the small intestine, while segmentation occurs in both the small and large intestine

Answer

Peristalsis is controlled by the enteric nervous system, while segmentation is controlled by the sympathetic nervous system

Answer

Peristalsis and segmentation are essentially the same process