GIT

Question 1

Which of the following is NOT a major function of the gastrointestinal (GI) system?
a) Bulk transport
b) Secretion
c) Respiration
d) Digestion
e) Absorption

Answer 1

c) Respiration

Question 2

The myenteric (Auerbach’s) plexus primarily controls:
a. Secretions of the gastrointestinal tract
b. Hormonal regulation of digestion
c. Motility and muscle contractions
d. Absorption of nutrients

Question 3

Cholecystokinin (CCK) stimulates:
a. Gastric acid secretion
b. Gallbladder contraction and pancreatic enzyme secretion
c. Inhibition of pancreatic enzyme secretion
d. Vasoconstriction in the GI tract

Question 4

Local reflexes in the gastrointestinal system:
a. Are initiated by the CNS
b. Are mediated by the myenteric plexus only
c. Produce involuntary, stereotypical responses to stimuli
d. Involve sensory neurons transmitting information to the hypothalamus

Question 5

Parasympathetic innervation to the gastrointestinal tract:
a. Originates from the thoracolumbar spinal cord
b. Is carried by the vagus nerve and pelvic nerves
c. Causes vasoconstriction and sphincter contraction
d. Decreases motility and secretory activity

Question 6

Sympathetic stimulation of the gastrointestinal tract:
a. Increases smooth muscle contraction
b. Decreases blood flow and motility
c. Causes relaxation of sphincters
d. Enhances secretion of digestive enzymes

Question 7

Which of the following lists the structures of the alimentary canal in the correct order?
a) Stomach, small intestine, large intestine, oesophagus, oral cavity
b) Oesophagus, oral cavity, stomach, small intestine, large intestine
c) Oral cavity, oesophagus, stomach, small intestine, large intestine
d) Large intestine, small intestine, stomach, oesophagus, oral cavity

Answer 7

c) Oral cavity, oesophagus, stomach, small intestine, large intestine

Question 8

The mechanical digestion of food involves:
a) Hydrolysis
b) Churning food
c) Absorption
d) Secretion of enzymes

Answer 8

b) Churning food

Question 9

Which division of the autonomic nervous system generally stimulates digestive processes? a) Sympathetic
b) Parasympathetic
c) Somatic
d) Enteric

Answer 9

b) Parasympathetic

Question 10

What is the primary function of the myenteric plexus? a) Controlling secretions
b) Regulating blood pressure
c) GI tract motility
d) Sensory input to the CNS

Answer 10

c) GI tract motility