Transmission of Nerve Impulses

What generates a nerve impulse on the post-synaptic membrane?

• Calcium binding with a receptor site

• Potassium leaking into the post-synaptic membrane 

• Neurotransmitter binding with receptor sites

• Neurotransmitter being removed from the synapse

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

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

The gap between two communicating neurons is termed ________.

• myelin sheath

• synaptic cleft

• node of Ranvier

• action potential

A change in the external environment that initiates an impulse is known as a

• synapse

• response

• stimulus

• receptor

Calcium channels on the axon terminal are _______ gated.

• Voltage 

• Chemically

• Mechancially

What is being identified with the arrows?

• calcium channels

• neurotransmitters

• receptors

• vesicles