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Chapter 26. Digestion & Absorption of Nutrients

A newborn baby is brought to the pediatrician suffering from severe diarrhea that worsens with meals. The symptoms diminish when nutrients are delivered intravenously. The child most likely has a mutation in which of the following intestinal transporters?

A. Na+, K+ ATPase

B. NHE3

C. SGLT-1

D. H+, K+ ATPase

E. NKCC1

An infant that was previously healthy but is displaying symptoms of acute diarrhea and dehydration after a presumed enteric infection is given Pedialyte, a solution of glucose and electrolytes. What membrane protein accounts for the ability of this solution to provide more rapid hydration than plain water?

A. Sucrase-isomaltase

B. SGLT-1

C. CFTR

D. Chloride-bicarbonate exchanger

E. Lactose-phlorizin hydrolase

In the situation described in question 2, the child’s mother does not have any Pedialyte available, so gives the infant some boiled water in which she has dissolved some salt and table sugar. Activity of which enzyme will be needed to make this solution effective?

A. Salivary amylase

B. Pancreatic amylase

C. Glucoamylase

D. Lactose-phlorizin hydrolase

E. Sucrase-isomaltase

A decrease in which of the following would be expected in a child exhibiting a congenital absence of enterokinase?

A. Incidence of pancreatitis

B. Glucose absorption

C. Bile acid reabsorption

D. Gastric pH

E. Protein assimilation

In Hartnup disease (a defect in the transport of neutral amino acids), patients do not become deficient in these amino acids due to the activity of

A. PepT1.

B. brush border peptidases.

C. Na+, K+ ATPase.

D. cystic fibrosis transmembrane conductance regulator (CFTR).

E. trypsin.

A patient with hypercholesterolemia is treated with cholestyramine, a resin that ...

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