Choose the most accurate characteristic of B cells.
A) They help establish and control the sensitivity of the immune response.
B) They stimulate the activities of T cells.
C) They attack foreign cells, normal cells infected with viruses, and cancer cells that appear in normal tissues.
D) They continually monitor peripheral tissues.
E) They differentiate into plasma cells that secrete antibodies.
E) They differentiate into plasma cells that secrete antibodies.
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The primary role of the carbonic acid-bicarbonate buffer system is
A) to buffer carbonic acid formed by carbon dioxide. B) to buffer the urine. C) the prevention of pH changes caused by organic and fixed acids. D) to increase the amount of carbonic acid during ventilation. E) to buffer stomach acid.
The partial pressure of nitrogen in the atmosphere is greater than the partial pressure of oxygen in the atmosphere
Indicate whether the statement is true or false
The femoral nerve arises from which nerve plexus?
A. Brachial B. Sacral C. Cervical D. Lumbar
Which structure is often referred to as the "Adam's apple"?
A. Vocal cords B. Epiglottis C. Thyroid cartilage D. Thyroid gland E. Cricoid cartilage