The Neuron

The structure labeled "2" is a A) soma. B) dendrite. C) initial segment. D) perikaryon. E) axon.

a

Identify the structure labeled "4." A) synaptic terminals B) telodendria C) dendritic spines D) collateral branches E) axons

b

On which structure do most neuron to neuron communications occur? A) 2 B) 1 C) 3 D) 4 E) 5

b

Identify the structure labeled "5." A) axons B) telodendria C) dendritic spines D) synaptic terminals E) collateral branch

d

Which part of the neuron can propagate an action potential? A) 1 B) 1 and 2 C) 2 and 3 D) 3

d

The structures labeled "1" are dendrites. Their membranes contain numerous chemically-gated ion channels. A) The first statement is true but the second statement is false. B) The first statement is false but the second statement is true. C) Both statements are true. D) Both statements are false. E) Both statements are true and relate to synaptic transmission.

e

What is contained inside the structure labeled "5" ? A) neuroglia B) sodium ions C) acetylcholinesterase D) calcium ions E) neurotransmitter molecules

e

Which type of membrane channels are found at label "3"? A) voltage-gated Na+ channels B) voltage-gated K+ channels C) chemically-gated Na+ and K+ channels D) voltage-gated Ca2+ channels E) both voltage-gated Na+ channels and voltage-gated K+ channels

e