Which is NOT an example of a graded potential?
A. a receptor potential in a sensory receptor cell
B. a depolarizing excitatory postsynaptic potential (EPSP)
C. a hyperpolarizing inhibitory postsynaptic potential (IPSP)
D. a depolarizing pacemaker potential
E. a depolarizing action potential
E
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If a person is injected with a toxin that blocks acetylcholine receptors, which of the following will occur?
A. The sarcolemma will be constantly stimulated and muscles will continually contract. B. Spastic paralysis will result. C. The toxin will have no effect on muscle action. D. Stimulation of the sarcolemma will not be possible and muscles will be paralyzed. E. The person will develop myasthenia gravis.
Why are cattle a danger, even when they are restrained in a chute?
What will be an ideal response?
Which statement comparing the right lung of a pig and a human is correct?
A) The right lung of the pig has more lobes than the human right lung. B) The right lung of the pig has fewer lobes than the human right lung. C) The right lung of the pig has the same number lobes as the human right lung.
Which of the following is NOT a major branch of the coronary arteries?
A) coronary sinus B) marginal artery C) circumflex artery D) anterior interventricular artery