Active sites become exposed when calcium ions bind to
A) tropomyosin.
B) actin.
C) myosin.
D) troponin.
E) calcium channels.
D) troponin.
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Which of the following descriptors is false regarding enzymes?
A) They are proteins. B) They function as biological catalysts. C) They lower the activation energy required for a reaction. D) They affect only the rate of a chemical reaction. E) They are consumed during the reaction.
Which of the following blood pressure readings would be indicative of hypertension?
A) 120/80 in a 30-year-old man B) 140/90 in a 70-year-old woman C) 170/96 in a 50-year-old man D) 110/60 in a 20-year-old woman
Cardiac output
a. is the volume of blood pumped by each ventricle during each contraction or beat. b. is the volume of blood pumped by each ventricle per minute. c. equals heart rate x stroke volume. d. both (a) and (c) above. e. both (b) and (c) above.
Conduction deafness may result from earwax buildup or the fusion of the ossicles
Indicate whether the statement is true or false