CLINICAL CASES
175
C O M P R E H E N SIO N Q U E ST IO N S
[19.1] Prior to a race, many marathon runners will try to increase their glyco-
gen concentrations by loading up with foods with a high starch content,
such as pasta. a-Amylase secreted by the pancreas will digest the
starch into which of the following major products?
A. Amylose, amylopectin, and maltose
B. Glucose, galactose, and fructose
C. Glucose, sucrose, and maltotriose
D. Limit dextrins, maltose, and maltotriose
E. Limit dextrins, lactose, and sucrose
[19.2] A 3-month-old infant presents with hepatosplenomegaly and failure to
thrive. A liver biopsy reveals glycogen with an abnormal, amylopectin-
like structure with long outer chains. Which of the following enzymes
would most likely be deficient?
A. a-Amylase
B. Branching enzyme
C. Debranching enzyme
D. Glycogen phosphorylase
E. Glycogen synthase
[19.3] A 3-year-old Caucasian female presents with chronic diarrhea and a
failure to thrive. Stools were oily. History reveals that she was breast-
fed and had no problems until she was weaned. Which of the enzymes
would be expected to be deficient following stimulation with secretin?
A. Cholesteryl esterase
B. Gastric lipase
C. Hormone sensitive lipase
D. Lipoprotein lipase
E. Pancreatic lipase
Match the following enzymes (A-D) to the products yielded.
A. Sucrose and lactose
B. Glucose and fructose
C. Glucose and galactose
D. Glucose
[19.4] Lactase
[19.5] Sucrase
[19.6] Maltase
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