The gray matter of the cerebrum is composed of neuron cell bodies and makes up both the ________ and the ________.
A. cortex; deep cerebral nuclei
B. cerebral tracts; cortex
C. cortex; white matter
Answer: A
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Predict what would happen to cardiac muscle cells if desmosomes were not present in intercalated discs
A) The cells would pull apart with each contraction. B) The cells would be unable to contract. C) They would not be able to move materials between cells. D) The cardiac muscle cells would not be able to contract as a unit.
Which of these is one reason you can distinguish between a needle prick on the foot and an ice cube on the wrist?
A. The action potentials from the needle prick are inherently different from the impulse generated by the ice cube. B. The region of the brain to which one receptor pathway leads is different from the region to which the other pathway leads. C. The needle prick generates a stronger action potential in any one neuron than an ice cube does. D. The needle prick generates a higher frequency of action potentials than the ice cube does. E. The ice cube stimulates a different class of receptors than the needle prick, even though both signals go to exactly the same location in the brain.
Natural killer (NK) cells are naturally occurring leukocytes that nonspecifically destroy bacteria-infected cells and cancer cells
a. True b. False Indicate whether the statement is true or false
What makes a cell responsive to a particular hormone?
A. The chemical properties of the hormone B. The location of the target cells in the body C. The site where the hormone is secreted D. The presence of a receptor for that particular hormone E. The location of the gland that secretes the hormone