Gastrointestinal Motility: Online Learning Quizzes for Medical Students

Question 1

Primarily, which mechanism propels food through the esophagus?

Accepted Answer

Peristalsis

Answer

Gravity

Answer

Segmental contractions

Answer

Retrograde contractions

Question 2

What is the primary function of the gastroesophageal sphincter?

Accepted Answer

Prevents gastric contents from refluxing into the esophagus

Answer

Regulates gastric emptying

Answer

Initiates peristalsis in the esophagus

Answer

Secretes mucus for esophageal lining protection

Question 3

Which hormone stimulates gastric motility?

Accepted Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Answer

Somatostatin

Question 4

What type of contraction pattern is characteristic of the small intestine?

Accepted Answer

Segmentation

Answer

Peristalsis

Answer

Haustrations

Answer

Mass movements

Question 5

Which of the following is NOT a function of the ileocecal valve?

Accepted Answer

Absorbs nutrients from the small intestine

Answer

Prevents colonic contents from flowing back into the small intestine

Answer

Regulates ileal emptying

Answer

Contributes to colonic motility

Question 6

What is the main propulsive force for movement of contents through the large intestine?

Accepted Answer

Mass movements

Answer

Peristalsis

Answer

Haustral contractions

Answer

Antiperistalsis

Question 7

What is the main role of enteric reflexes in gastrointestinal motility?

Accepted Answer

Coordinate local motility patterns

Answer

Transmit signals to the central nervous system

Answer

Control hormone release from the gastrointestinal tract

Answer

Regulate blood flow to the gastrointestinal organs

Question 8

For gastroparesis, what is the first-line therapy?

Accepted Answer

Prokinetic agents

Answer

Antibiotics

Answer

Dietary modifications

Answer

Surgery

Question 9

Which hormone stimulates gastric secretions and contractions?

Accepted Answer

Gastrin

Answer

Secretin

Answer

Cholecystokinin

Answer

Insulin

Question 10

Which of the following is NOT a known function of the enteric nervous system?

Accepted Answer

Regulation of blood pressure

Answer

Regulation of motility

Answer

Control of secretion

Answer

Sensing luminal stimuli

Question 11

What is the primary neurotransmitter involved in activating gastrointestinal reflexes?

Accepted Answer

Acetylcholine

Answer

Norepinephrine

Answer

Dopamine

Answer

Serotonin

Question 12

Which drug is commonly used to manage constipation?

Accepted Answer

Bisacodyl

Answer

Propranolol

Answer

Omeprazole

Answer

Metformin

Question 13

Which condition is characterized by abnormally increased propulsive contractions in the gastrointestinal tract?

Accepted Answer

Intestinal pseudo-obstruction

Answer

Gastroparesis

Answer

Irritable bowel syndrome

Answer

Hyperthyroidism

Question 14

Which of the following scenarios best exemplifies the inhibitory influence of the central nervous system on gastrointestinal motility?

Accepted Answer

Suppression of colonic motility during sleep

Answer

Enhanced gastric emptying during stressful situations

Answer

Relaxation of the lower esophageal sphincter during the act of swallowing

Answer

Stimulation of gastric acid secretion via vagal nerve activation

Question 15

Which of the following is NOT a function of the gastroesophageal sphincter?

Accepted Answer

Releases digestive enzymes into the stomach

Answer

Prevents the reflux of gastric contents into the esophagus

Answer

Facilitates the passage of food from the esophagus to the stomach

Answer

Prevents the entry of air into the stomach

Question 16

Which of the following is the primary mechanism of propulsion in the small intestine?

Accepted Answer

Peristalsis

Answer

Segmentation

Answer

Haustrations

Answer

Mass movements

Question 17

Which hormone primarily stimulates gastric motility and secretions?

Accepted Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Answer

Glucagon

Question 18

Which of the following is a common clinical manifestation of impaired colonic motility?

Accepted Answer

Constipation

Answer

Diarrhea

Answer

Nausea

Answer

Frequent vomiting

Question 19

Which of the following nerves is responsible for the parasympathetic innervation of the stomach and small intestine?

Accepted Answer

Vagus nerve

Answer

Sympathetic nerves

Answer

Pelvic nerves

Answer

Splanchnic nerves

Question 20

Which of the following is NOT a mechanism of propulsion in the esophagus?

Accepted Answer

Antiperistalsis

Answer

Peristalsis

Answer

Gravity

Answer

Negative intrathoracic pressure

Question 21

Which of the following hormones inhibits intestinal motility and stimulates the release of pancreatic enzymes?

Accepted Answer

Cholecystokinin

Answer

Gastrin

Answer

Secretin

Answer

Glucagon

Question 22

Which type of colonic movement is responsible for moving stool toward the rectum?

Accepted Answer

Mass movements

Answer

Haustrations

Answer

Segmentation

Answer

Antiperistalsis

Question 23

Describe the mechanisms that constitute the gastroesophageal reflux barrier and explain its crucial role in preventing gastroesophageal reflux disease.

Accepted Answer

The gastroesophageal reflux barrier primarily comprises lower esophageal sphincter tone, mucosal resistance, and esophageal clearance.

Answer

The gastroesophageal reflux barrier solely depends on lower esophageal sphincter tone to prevent reflux.

Answer

The gastroesophageal reflux barrier is only active during swallowing.

Answer

Gastroesophageal reflux disease solely results from impaired lower esophageal sphincter tone.

Question 24

What is the primary mechanism responsible for gastric emptying?

Accepted Answer

Peristalsis

Answer

Systolic contractions

Answer

Diffusion

Answer

Vomiting

Question 25

Which of the following hormones stimulates colonic motility?

Accepted Answer

Motilin

Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Question 26

What is the main neurotransmitter involved in the parasympathetic innervation of the gastrointestinal tract?

Accepted Answer

Acetylcholine

Answer

Norepinephrine

Answer

Dopamine

Answer

Serotonin

Question 27

Which of the following diseases is characterized by impaired esophageal motility?

Accepted Answer

Achalasia

Answer

Gastroparesis

Answer

Ulcerative colitis

Answer

Crohn's disease

Question 28

What is the pattern of electrical activity in the stomach during the fasting state?

Accepted Answer

Interdigestive myoelectric activity

Answer

Basic electrical rhythm

Answer

Migrating motor complex

Answer

Slow waves

Question 29

Which of the following substances inhibits gastric acid secretion?

Accepted Answer

Somatostatin

Answer

Histamine

Answer

Gastrin

Answer

Secretin

Question 30

What is the primary mechanism by which peristalsis propels food through the gastrointestinal tract?

Accepted Answer

Relaxation of circular muscles and contraction of longitudinal muscles

Answer

Contraction of circular muscles only

Answer

Diffusion

Answer

Bacterial fermentation

Question 31

Which of the following is a common symptom of gastroesophageal reflux disease?

Accepted Answer

Heartburn

Answer

Nausea

Answer

Constipation

Answer

Abdominal pain

Question 32

What is the primary function of the ileocecal valve?

Accepted Answer

Preventing reflux of colonic contents into the ileum

Answer

Regulating the flow of chyme into the colon

Answer

Absorbing water and electrolytes

Answer

Secreting digestive enzymes

Question 33

Which mechanism is primarily responsible for propelling food down the esophagus?

Accepted Answer

Peristalsis

Answer

Segmentation

Answer

Mixing contractions

Answer

Pendulum movements

Question 34

Identify the type of nerve that innervates the smooth muscle of the gastrointestinal tract:

Accepted Answer

Enteric neurons

Answer

Somatic motor neurons

Answer

Parasympathetic neurons

Answer

Sympathetic neurons

Question 35

Which hormone is known to stimulate gastric motility?

Accepted Answer

Gastrin

Answer

Somatostatin

Answer

Secretin

Answer

Cholecystokinin

Question 36

What is the primary function of segmentation contractions within the small intestine?

Accepted Answer

Mixing of chyme

Answer

Propulsion of chyme

Answer

Absorption of nutrients

Answer

Prevention of backflow

Question 37

Identify the reflex pathway that plays a role in inhibiting gastric emptying:

Accepted Answer

Enterogastric reflex

Answer

Gastroileal reflex

Answer

Gastrocolic reflex

Answer

Vasoactive intestinal peptide reflex

Question 38

What is the characteristic motility pattern observed in the colon?

Accepted Answer

Mass movements

Answer

Peristalsis

Answer

Segmentation

Answer

Pendulum movements

Question 39

What is the most common therapeutic approach for managing gastrointestinal motility disorders?

Accepted Answer

Combination of the above

Answer

Dietary modifications

Answer

Medications

Answer

Surgery

Question 40

What is the main function of the ileocecal valve?

Accepted Answer

Prevents backflow of colonic contents into the small intestine

Answer

Controls the flow of bile into the small intestine

Answer

Absorbs water and electrolytes from the small intestine

Answer

Secretes mucus to lubricate the small intestine

Question 41

Which of the following is a common clinical manifestation of esophageal dysmotility?

Accepted Answer

Dysphagia

Answer

Heartburn

Answer

Abdominal pain

Answer

Constipation

Question 42

Which of the following is the primary force responsible for propelling contents through the small intestine?

Accepted Answer

Peristalsis

Answer

Segmentation

Answer

Mass movements

Answer

Haustrations

Question 43

What is the primary function of the migrating motor complex (MMC) in gastrointestinal motility?

Accepted Answer

Clears undigested material from the small intestine

Answer

Stimulates gastric acid secretion

Answer

Promotes colonic emptying

Answer

Controls appetite

Question 44

Which of the following classes of drugs is primarily used in the treatment of constipation?

Accepted Answer

Laxatives

Answer

Antispasmodics

Answer

Antidiarrheals

Answer

Prokinetics