Which of the following statements is true?
A. Peptic ulcers usually form in the small and large intestines.
B. Vomiting blood is a sign of irritable bowel syndrome.
C. Acid reflux often results when the gastroesophageal sphincter fails to close properly.
D. People who are infected with H. pylori have a high risk of developing type 1 diabetes.
Answer: C
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John suffers from allergic reactions like skin lesions and edema. He visits a doctor, and after a number of tests, it is found that John is deficient in the amino acid methionine. In this scenario, which of the following is most likely the reason for the amino acid deficiency?
A) Insufficient intake of methionine B) Defective synthesis of methionine C) Sporadic process of transamination D) Inadequate intake of nonessential amino acids
The first trimester of pregnancy
A. is a time of particular importance to avoid nutritional deficiencies and environmental exposures that could harm the fetus. B. involves a rapid increase in cell size rather than cell number. C. is a time when nutritional deficiencies have little effect on the developing fetus. D. is the least critical time during fetal development.
When a normal, healthy adult consumes twice as much protein as he requires, his nitrogen output will:
a. equal his nitrogen intake. b. exceed his nitrogen intake. c. depend on his genetics. d. be less than his nitrogen intake.
What is the chief function of hemosiderin?
a. Stores excess body iron b. Inhibits hemoglobin synthesis c. Enhances heme iron absorption d. Enhances nonheme iron absorption e. Promotes iron excretion