The thymus produces two peptides that function to
A) regulate iodine levels in the thyroid.
B) aid in the maturation of T lymphocytes.
C) regulate thyroxine release.
D) increase blood calcium levels.
E) promote the breakdown of bone.
B
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Which disease may develop when microbes enter the blood stream directly via IV drug use or dental
work? a. rheumatic fever b. hypertension c. endocarditis d. myocarditis e. malignant melanoma
Which of the following statements is true of proteins?
a. Proteins lose some or all of their normal activity if their three-dimensional structure is disrupted. b. Proteins are composed of ribose, phosphate, and a nitrogen-containing base. c. The activity of proteins is independent of temperature and pH. d. Denaturation is usually reversible. e. All proteins are enzymes.
List four reasons for deforestation in the tropics. Which of these are associated with consumption by persons in highly
developed countries? Which are associated with overpopulation of indigenous persons? What will be an ideal response?
The taste known as sour is caused by
A. the presence of hydrogen ions. B. hot materials. C. sugars. D. any kind of ions.