The total amount of neurotransmitter released at the axon terminal is directly related to
A) the amplitude of the action potential.
B) the total number of action potentials.
C) the length of the axon.
D) the amplitude of the graded potential.
B) the total number of action potentials.
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A steroid hormone acts on a target cell by
A. causing a second messenger to be formed. B. causing the cell to divide. C. directly causing protein synthesis. D. promoting phagocytosis.
Most of the ascending and descending pathways to and from the brain cross over (decussate) from one side of the body to the other
Indicate whether the statement is true or false
Features of smooth muscle tissue include
A) intercalated discs. B) its exclusive location in the heart. C) the ability to regenerate after injury. D) a single nucleus (usually) for each cell. E) both having a single nucleus (usually) for each cell and regenerative capabilities
Cones have higher acuity than rods because
a. cones respond more to long wavelengths of light b. there are three types of cones c. there is little convergence in the cone pathways within the retina d. there are more cones than rods e. the photopigment in cones breaks down more rapidly than the photopigment in rods.