Neuron Phys & Synapse

Neurotransmitters are released from the

• Dendrites

• Post-synaptic neuron

• Presynaptic neuron

• Schwann Cells

What is the chemical used by a neuron to transmit an impulse across a synapse to another nerve cell?

• Neurotransmitters
• Synapse
• Threshold
• Impulse

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 on protein channels

• Neurotransmitter being removed from the synapse

The location of neurotransmitters

• axon terminals

• dendrites

• Schwann cells

• cell body

What ion channel opens by the action potential in the presynaptic neuron that causes the vesicles containing neurotranmitters to move toward the synaptic cleft?

• calcium

• potassium

• sodium

• phosphorus

The operation of the sodium-potassium "pump" moves:

• sodium & potassium ions into the cell

• sodium & potassium ions out of the cell

• sodium ions into the cell & potassium ions out of the cell

• potassium ions into the cell & sodium ions out of the cell

Tags

NGSS.HS-LS1-3

For a neuron with a resting membrane potential at -70mv, an increase in the movement of sodium ions into the neuron's cytoplasm would result in:

• the depolarization of the neuron.
• the repolarization of the neuron 
• the replacement of potassium ions with sodium ions.
• the replacement of potassium ions with calcium ions.

What number on the graph represents the Threshold potential or voltage?

• 1

• 3

• 4

• 6

Tags

NGSS.HS-PS2-5

What number on the graph represents the Repolarization phase?

• 1
• 2
• 3
• 4

The sodium-potassium pump

• uses diffusion to attain -70mV

• uses ATP to create a membrane differential along a resting neuron.

• is stimulated by neurotransmitters

• is an example of passive transport across a membrane

Tags

NGSS.HS-LS1-3