Which of the following statements is not true?
A. B and T lymphocytes begin development as pluripotent stem cells in red bone marrow.
B. B and T lymphocytes are involved in nonspecific defense.
C. B and T lymphocytes both complete their development in the thymus gland.
D. B and T lymphocytes develop antigen receptors on their surfaces.
E. B and T cells that react against the body's own tissue are pruned through the process of negative selection.
C. B and T lymphocytes both complete their development in the thymus gland.
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The innermost electron shell in an atom holds up to ________ electrons
A) 1 B) 2 C) 4 D) 6 E) 8
How much of the energy available in ATP is lost as heat energy during an isotonic contraction by skeletal muscle?
a. 15% b. 25% c. 50% d. 60% e. 75%
Which diagnostic test records the heart's electric activity?
A. Heart CT scan B. Echocardiogram C. Electrocardiogram D. Stress test
Urine leaves the bladder through the ________
A) Kidneys B) Urethra C) Ureters D) None of the above