A man just ate a plant-based hamburger with a bun and nothing else on the sandwich.Coincidentally, he visited his doctor an hour later.Out of concern that the man has been eating normally but losing weight, the doctor conducts some tests. The initial tests and observations showed that the man's caloric consumption (using the patient's food diary) should meet his caloric expenditure so that the man should be able to maintain a relatively constant body mass.The doctor ran another test on the man's feces and found that there was an abnormally low level of proteins in the feces. Surprisingly, the doctor found higher than expected levels of amino acids in the man's feces. No other abnormal results were found. Q1) Multiple answers: Based upon all of the evidence collected by the doctor, which of the following represents a cause of the symptoms? Group of answer choices a) Too low amounts of protein-digesting enzymes normally secreted from the stomach b) Too much acid secretion in the stomach c) A structural problem with the secondary active transporter for amino acids in the luminal membrane surfaces of epithelial cells lining the stomach d) A structural problem with the secondary active transporter for amino acids in the basolateral membrane surfaces of epithelial cells lining the small intestine e) A structural problem with the secondary active transporter for amino acids in the luminal membrane surfaces of epithelial cells lining the small intestine f) A defect in the sodium/potassium ATPase pump in the basolateral membrane of the epithelial cells of the small intestine.

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

Background

A man just ate a plant-based hamburger with a bun and nothing else on the sandwich.Coincidentally, he visited his doctor an hour later.Out of concern that the man has been eating normally but losing weight, the doctor conducts some tests.

The initial tests and observations showed that the man's caloric consumption (using the patient's food diary) should meet his caloric expenditure so that the man should be able to maintain a relatively constant body mass.The doctor ran another test on the man's feces and found that there was an abnormally low level of proteins in the feces. Surprisingly, the doctor found higher than expected levels of amino acids in the man's feces.

No other abnormal results were found.

Q1) Multiple answers: Based upon all of the evidence collected by the doctor, which of the following represents a cause of the symptoms?

Group of answer choices

a) Too low amounts of protein-digesting enzymes normally secreted from the stomach

b) Too much acid secretion in the stomach

c) A structural problem with the secondary active transporter for amino acids in the luminal membrane surfaces of epithelial cells lining the stomach

d) A structural problem with the secondary active transporter for amino acids in the basolateral membrane surfaces of epithelial cells lining the small intestine

e) A structural problem with the secondary active transporter for amino acids in the luminal membrane surfaces of epithelial cells lining the small intestine

f) A defect in the sodium/potassium ATPase pump in the basolateral membrane of the epithelial cells of the small intestine.

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