A protein kinase is an enzyme that adds a phosphate to its substrate
Indicate whether this statement is true or false.
TRUE
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High carbon dioxide levels and low pH in blood of the carotid arteries will stimulate
A. baroreceptors to activate the vasomotor center. B. chemoreceptors to activate the vasomotor center. C. baroreceptors to activate the cardioinhibitory center and inhibit the cardioacceleratory center. D. chemoreceptors to inhibit the vasomotor center. E. baroreceptors and chemoreceptors to activate the cardioinhibitory center and inhibit the vasomotor center.
Functionally, smooth muscle
A. is well adapted to anaerobic metabolism. B. exhibits autorhythmic contractions. C. contracts in response to slow increases in length. D. is unable to maintain tone. E. rapidly develops an oxygen debt.
A heartbeat is started by what structure?
A. Sinoatrial node B. Atrioventricular node C. Atrioventricular bundle D. Purkinje fibers
An irregularity in curvature in the cornea or lens, called ________, causes a reduction in visual acuity
A) astigmatism B) glaucoma C) a cataract D) macular degeneration E) corneal atrophy