1.Select the in correct statement about the mechanism of sodium absorption. d. A
ID: 83955 • Letter: 1
Question
1.Select the incorrect statement about the mechanism of sodium absorption.
d. Active absorption occurs at the basolateral membrane through sodium/potassium pump in the jejunum, ileum and colon.
2. The stimulation of which reflex lumen of the GI tract can trigger a response without any involvement of the CNS?
a. The precise mechanism for sodium absorption is the same for all small intestinal segments. b. Solvent drag helps sodium absorption in the duodenum and jejunum. c. Absorption of sodium is usually coupled to chloride absorption.d. Active absorption occurs at the basolateral membrane through sodium/potassium pump in the jejunum, ileum and colon.
2. The stimulation of which reflex lumen of the GI tract can trigger a response without any involvement of the CNS?
a. long reflex b. gastric-phase control reflex c. cephalic-phase control reflex d. short reflexExplanation / Answer
Ans 1 a. The precise mechanism for sodium absorption is the same for all intestinal segments.
No its not same in all the intestinal segments.
At someplaces it by cotransport with glucose and amino acids, somewhere it is coupled with chlorine absorption.
At some places like jejunum it was greatly affected and influenced by water flow, whereas in ileum it was unaffected by water flow and by addition of glucose or galactose.
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