Polysynaptic reflexes can produce far more complicated responses than monosynaptic reflexes because
A) motor neurons carry impulses at a faster rate than do sensory neurons.
B) the interneurons involved can trigger many muscle groups.
C) the response time is quicker.
D) interneurons speed up processing.
E) the response is initiated by highly sensitive receptors.
B) the interneurons involved can trigger many muscle groups.
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The inferior vena cava brings blood from the lower regions of the body and empties into the
a. left atrium. b. right atrium. c. Aorta. d. left ventricle. e. right ventricle.
The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels. All of the following are consequences of this inactivation except one
Choose the statement below that is not a consequence of the closing of inactivating gates. A) This allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell. B) This allows for the one way transmission of action potential down the axon. C) This limits the frequency of action potentials down the axon. D) This stops the depolarization of the axon membrane.
Explain why transporting epithelial cells are said to be polarized. What does it mean when a nerve cell is said to be polarized?
What will be an ideal response?
The presence of a cellular clock, presence of "death genes," and damage to DNA or mitochondria are all hypotheses of ________.
A. aging B. death C. cleavage D. differentiation