Defense mechanisms that respond at the same speed and efficiency upon repeated exposure are classified as ________ immunity and defense mechanisms that increase in speed and strength upon repeated exposure are classified as ________ immunity.
A. specific; innate
B. adaptive; innate
C. innate; adaptive
D. innate; non-specific
Answer: C
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A hormone that the adrenal medulla secretes is
A. mineralocorticoid. B. glucocorticoid. C. epinephrine. D. aldosterone.
Answer the following statements true (T) or false (F)
1. Proper control of the hydrogen ion concentration is important to the functioning of hemoglobin. 2. The pH of a solution is based on the exponent of the hydrogen ion concentration. 3. More acids than bases are usually added to body fluids. 4. When sodium bicarbonate buffers a strong acid, the hydrogen ion from the acid replaces the carbon in the bicarbonate. 5. With successful CPR after a cardiac arrest, proper heart rate and breathing are restored. Because of this, the body’s respiratory and urinary pH control mechanisms can quickly return the body to its proper pH.
Steroid hormones and thyroid hormones ________ pass across the plasma membrane; they cause the target cells to ________ that produce the characteristic effects of the hormones.
A. cannot; synthesize specific proteins B. can; activate or inactivate the cellular enzymes C. can; synthesize specific proteins D. cannot; activate or inactivate the cellular enzymes
What do Paneth cells secrete?
A. Hydrochloric acid B. Amylase C. Pepsinogen D. Mucus E. Lysozyme