During exercise, which of the following directly increases respiratory rate?
A) Reduced oxyhemoglobin
B) The Bohr effect
C) Increased H+ level in the blood
D) Anticipation of the needs of exercising muscle
E) Reduced blood pH
D
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Which of the following is formed by intramembranous ossification?
A. Femur B. Rib C. Clavicle D. Ulna E. Ilium
Poison ivy contains a toxin that acts as a hapten by
A. raising the body's sensitivity to a wide variety of chemicals such as penicillin. B. cutting plasma protein antibodies in half. C. preventing effective immune responses by blocking release of bradykinin. D. combining with a body protein and then triggering an immune response.
Which system in the body is similar to the endocrine system, in that it is also a regulatory system, and it also functions through chemical secretions and receptor sites?
A. Nervous system B. Urinary system C. Cardiovascular system D. Integumentary system E. Muscular system
More than 95 percent of the protein in a red blood cell is
A) albumin. B) porphyrin. C) hemoglobin. D) immunoglobulin. E) fibrinogen.