Which of the following is NOT an enzyme given to someone experiencing a myocardial infarction to break up blood clots?
A. Nitroglycerin
B. Urokinase
C. Tissue plasminogen activator (t-Pa)
D. Streptokinase
Answer: A
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The discoloration and swelling of a muscle strain is due to
A) excess myofibrils. B) ruptured blood vessels. C) severed nerves. D) separated tendons.
The expression "all-or-none" means that ________
A) the compound action potential in a nerve is graded B) the action potential in a neuron may be larger or smaller depending on the amount of stimulation (it is graded) C) the action potential in a neuron always has the same shape and size (amplitude) D) the compound action potential in a nerve always has the same shape and size (amplitude)
The reticular formation
A. is composed of nuclei scattered throughout the cerebellum. B. is composed of nuclei scattered throughout the brain stem. C. is composed of nuclei scattered throughout the cerebrum. D. is responsible for pain interpretation. E. coordinates fine motor movements.
Which of the following will best increase the conduction rate of action potentials?
A) Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage. B) Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage. C) Increase the diameter of the axon, decrease the resistance of the axon membrane to ion leakage. D) Decrease the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.