Which of the following is not an antigen?
a. Bacteria
b. Macrophages
c. Viruses
d. Toxins
e. Allergens
Answer: B
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Cooper eats a lot of refined grain products that have not been enriched with nutrients. He likes to eat fresh fruit, cabbage, and corn; but he avoids pork, beef, poultry, chicken, eggs, and dairy foods. Recently, he has been feeling tired, and his muscles are not as strong as they used to be. The skin of his face and neck has red and scaly patches. For the past couple of days, he has had bouts of diarrhea. Based on this information, Cooper probably is suffering from ________.
A. pernicious anemia B. pellagra C. scurvy D. xerophthalmia
What is the role of the "gatekeeper," as applied to nutrition?
Substances in certain foods such as oats and olives that are similar in structure to cholesterol but that are not absorbed by the body and act to decrease cholesterol absorption are called:
How is blood pressure regulated?
a. aldosterone decreases sodium reabsorption by the kidneys. b. renin converts angiotensin I into angiotensin II, which is activated to angiotensin III. c. water follows the sodium, helping to maintain blood volume and blood pressure d. an increase in blood pressure triggers the kidneys to release the enzyme renin.