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Question 45 2 pts A collateral axon provides neurotransmitters at the synaptic cleft that opens chemically- gated Cl- channels. This is an example of: O temporal summation IPSP EPSP spatial summation Next Question 46 2 pts The action of a neurotransmitter depends on what happens when it binds to a ligand receptor. Which example is the best illustration of this: O Norepinephrine in the sympathetic nervous system causes pupil dilation. Norepinephrine in the parasympathetic nervous system causes pupil constriction. O Norepinephrine causes smooth muscle in the blood vessels to constrict but smooth muscle in the respiratory system to dilate O contraction of the sphincters in the digestive system are a response to autonomic stimulation but skeletal muscle contraction is a response to somatic stimulation The action of a neurotransmitter depends on whether it makes sodium go into or out of a cell Next > Question 47 2 pts The paravertebral ganglion is crushed, causing damage to which component of the reflex arc? control center O integration center motor signal to the effector sensory input from the stimulus Next Previous