quiz: nervous system

the role of the parasympathetic division of the autonomic nervous system is to

establish homeostasis after fight-or-flight response

dopamine, norepinephrine, and acetylcholine are all

neurotransmitters that excite or inhibit a neural signal across a synapse

which of the following is the correct sequence of the neural chain of events set in motion by an environmental stimulus?

receptors, afferent neurons, interneurons, efferent neurons, effectors

which of the following occurs when a neuron is stimulated to its threshold?

the movement of sodium and potassium ions across the membrane creates an action potential

neurotransmitters are typically stored in which of the following parts of a neuron?

the terminal buttons

reuptake of neurotransmitter refers to

absorption of the neurotransmitter into the terminal buttons of sending neruon

which of the following correctly describes the firing of neurons?

an all-or-none response

activation of the sympathetic branch of the autonomic nervous system results in

an increase in respiratory rate

curare blocks action at acetylcholine synapses and causes paralysis. this drug is an example of an

antagonist

the primary effect of the myelin sheath is to

increase the velocity of conduction of the action potential along the axon