Nerve Impulse Sequence

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

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

Z

• Dendrite

• Axon Terminal

• Neurotransmitters

• Synapse

Identify each phase of the action potential: Resting potential prior to the impulse conduction.

True/False: A nerve impulse is an all-or-none response. Either the threshold is met and the impulse proceeds through the whole neuron, or it never starts at all.

• False

• True

Tags

Standard 3.1 Meeting

Which ions are involved in the electrical nerve impulse?

• Iodine and Sodium

• Potassium and Sodium

• Iron and Sodium

• Calcium and Iodine

Identify each phase of the action potential: Depolarization

Tags

NGSS.HS-PS3-5

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

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

• synapse

• response

• stimulus

• receptor