Nerve Impulse

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

When a neuron is depolarized, what are the first channels to open?

• Sodium
• Potassium
• Calcium
• ACTH

When a neuron is resting, the inside of the axon has a ____________ charge.

• positive
• negative

When a neuron is at REST,

• the inside of the neuron is negatively charged compared to the outside.

• the inside of the neuron is positively charged compared to the outside.

• there is no charge difference established

• none of these is true

Neurotransmitters are released from the

• Dendrites
• Post-synaptic neuron
• Presynaptic neuron
• Axon

Z

• Dendrite
• Axon Terminal
• Neurotransmitters
• Synapse

calcium is responsible for

• signaling the release of the neurotransmitter

• signaling Na to be released into the membrane

• signaling the release of K out of the membrane

• serving as the neurotransmitter

Which is the last step in the synaptic transmission of a nerve impulse from pre-synaptic neuron to a postsynaptic cells.

• a nerve impulse arrives at the axon terminal of the presynaptic cell
• vessicles in the presynaptic neutron fuse with the cell membrane
• neurotransmitter molecules are released into the synaptic cleft
• neurotransmitters bind to receptor proteins on the postsynaptic cell

The gap between two communicating neurons is termed ________.

• myelin sheath

• synaptic cleft

• node of Ranvier

• action potential