2020 PHYSIOLOGY: GI Motility, Digestion, Secretion, Absorption

A vibrant educational illustration depicting various aspects of the gastrointestinal tract, including smooth muscle contraction, digestion processes, and the role of enzymes in the stomach and intestines, with a focus on clarity and educational value.

Understanding GI Physiology: A Quiz Experience

Test your knowledge on gastrointestinal physiology with our comprehensive quiz! This quiz covers essential topics such as GI motility, digestion, secretion, and absorption, allowing you to deepen your understanding of how the human digestive system works.

Join the challenge to enhance your knowledge with questions that range from basic concepts to more advanced topics:

Multiple choice questions
Coverage of key physiological processes
Engaging and informative

32 Questions8 MinutesCreated by DigestingScience47

Which of the ff is true about smooth muscles?

Actin and myosin filaments are not present

There is troponin-tropomyosin complex for contraction

Ca2+ is the ion for depolarization

Few SER but numerous mitochondria

All of the above

None of the above

The enteric smooth muscle is a ______________.

Single unit

Multiunit

Fixed unit

None of the above

Depolarization is stimulated by which of the following neurotransmitters?

Norepinephrine

Epinephrine

Serotonin

Acetylcholine

Which of the ff triggers the true action potential in the GI smooth muscle?

Na+ influx

Na+ efflux

Ca2+ influx

Ca2+ efflux

Which among the components of saliva aids in the dissolution of nutrients from food?

Water

Mucin

Bicarbonate

Amylase

HCl is secreted by which gastric gland cell?

Mucus cell

Zymogen cell

Parietal cell

G-cell

Pepsin is actively degrading proteins in the small intestine.

True

False

Gastric secretion is inhibited by the following except

Secretin

Calcitonin

Epinephrine

Somatostatin

If duodenum is distended, which of the ff events happen?

Release of pancreatic enzyme is stimulated by which hormone?

Secretin

Cholecystokinin

Gastrin

Motilin

Which carrier is responsible for transporting reducing sugars from the intestinal cell to the blood?

Na+/Glucose transporter

Na+/K+ ATPase pump

Glucose Transporter 5

Glucose Transporter 2

IKI solution is introduced to Sample A. Sample A becomes caramel-colored. What can you conclude from this?

There is no starch in the solution.

There is no amylase in the solution.

There is starch but no amylase in the solution.

There is no reducing sugar in the solution.

What will be the result of a Benedict's assay to a sample containing starch and amylase that is boiled for a minute?

It will produce a reddish brown solution.

It will produce an orange solution.

It will contain presence of reducing sugars.

It will yield a negative result.

Activity of amylase is most effective at which pH value?

Acidic pH (pH < 3)

Alkaline pH (pH > 8)

Physiologic pH (pH = 7.4)

PH value has no effect

Greater optical density obtained from a spectrophotometric measurement means

Pepsin activity is highest at which pH value?

Acidic pH

Alkaline pH

Physiologic pH

PH value does not matter

What is the importance of bile salts?

Aids in fat digestion

Reduced surface area of lipid

Inhibits lipase activity

None of the above

PH is expected to ________ upon hydrolysis of TAGs by pancreatic lipase.

Increase

Decrease

Remain the same

PH does not matter

Spike potentials increase due to ______ activity of ANS.

Sympathetic

Parasympathetic

Pathetic

Palmitic

The digestive system depends only on extrinsic innervation for motility.

True

False

Which nerve plexus is responsible for regulation of secretomotor activity of the GI tract?

Auerbach's plexus

Meissner's plexus

Myenteric plexus

Gastric plexus

What is the primary stimulus for reflex responses throughout the GI tract?

Presence of food

Secretion of enzymes or hormones

Nervous activity

Peristaltic movements

Gravity is necessary for movement of food throughout the GI tract.

True

False

BER in the stomach reaches 3-4x in a minute.

Gastric peristalsis

Gastric retropulsion

Gastric accomodation

Gastric emptying.

Proximal stomach relaxes once LES relaxes to prepare for entry of food.

Peristalsis

Retropulsion

Accomodation

Emptying

Pyloric antrum propels bolus to the proximal stomach until bolus becomes small.

Peristalsis

Retropulsion

Vomiting reflex

Gastroesophageal reflux

Pressure becomes high that intense contractions propels digested food out of the pylorus.

Peristalsis

Retropulsion

Reflux

Emptying

In migrating myoelectric complex, the pyloric sphincter remains contracted.

True

False

Decreased motility in the colon will _________.

Voluntary ________ of the external anal sphincter leads to defecation.

Contraction

Relaxation

Distention

Constriction

The anorectal angle straightens when abdominal pressure is increased. This means that the puborectalis muscle is ____.

Contracting

Relaxing

No change in tension

Spastic

Forceful expulsion of gastric contents from duodenum to the mouth.

Defecation

Vomiting

Valsalva's maneuver

Swallowing

2020 PHYSIOLOGY: GI Motility, Digestion, Secretion, Absorption

Understanding GI Physiology: A Quiz Experience

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