Question

Q1. All of the following occur during the intestinal phase of digestion execept?

A. Insulin is released from beta cells of the pancreas

B. The secertion of cholecystokinsin ensures micelle formation

C. THe seceretion of secretin raises intestinal pH.

D. Gastric motility increases.

Q2. Which of the following decribes the interaciton between extrinic neurons and the enteric nervous system/

A. GI distention and chemoreceptors stimualte sensory afferent vagus neurons which synpase with the motor neurons aof the myentric plexus.

B. Gi distention stimulates snesory vagus neurons which snypase with the agus motor neurons

C. Gi distention stimualtes sensory afferent vagus neurons which synapse with the enteric nervous system causing persitalsis.

D. GI distention stimulates sensory afferent vaugs neurons which release Acetylcholine causing contraction of the muscularis externa

Answer 1

1. Answer- A. Insulin is secreted from the beta cells of the pancreas.

Insulin is a hormone and has no role in digestion. After the nutrients, specially glucose, are absorbed in the blood, the blood sugar level rises. In response to this, the pancreas secrete the hormone insulin, which helps to convert excess glucose in blood into glycogen that can be stored in the liver and muscle cells.

2. Answer - C. GI distention stimulates sensory afferent vagus neurons which synapse with enteric nervous system causing peristalsis

Vagus nerve plays an important role in regulating the various steps of the digestive process that also includes peristalsis, which is the contractions of the alimentary canal and is required to propel the food further down in the digestive tract.