What is incidence of disease?
A. The number of new occurrences of the disease
B. The study of how disease affects the overall health and well-being of a population
C. The total number of cases of a disease in a population
D. None of these is correct
Answer: A
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Which is TRUE about the comparison of excitation-contraction coupling in cardiac muscle with that in skeletal muscle?
A. Extracellular Ca2+ plays a major role in cardiac but not skeletal muscle. B. The mechanism for Ca2+ release from the sarcoplasmic reticulum is the same in both types of muscle. C. Troponin sites are completely saturated immediately after Ca2+ release in both types of muscle. D. There is no net change in total intracellular Ca2+ concentration in either muscle. E. Intracellular Ca2+ stores are necessary for contraction in skeletal muscle, but not in cardiac muscle.
Which muscle contracts when one smiles?
A. Frontalis B. Zygomaticus major C. Depressor anguli oris D. Orbicularis oris E. Buccinator
Ion Channels: open and close in response to physical deformation of receptors
A. Voltage gated B. Leaky C. Chemically Gated D. Mechanically Gated
Which of the following statements accurately describes the pattern of ventricular contraction?
A. The ventricles contract from the base toward the apex moving blood into the great arteries located superior to the ventricles. B. The ventricles contract from the apex toward the base moving blood into the great arteries located inferior to the ventricles. C. The ventricles contract from the base toward the apex moving blood into the great arteries located inferior to the ventricles. D. The ventricles contract from the apex toward the base moving blood into the great arteries located superior to the ventricles.