Chapter 10 - Nervous System Intro Part 2

Chapter 10 - Nervous System Intro Part 2

Multiple Choice

What is the purpose of the myelin sheath on the axon?

• To maintain temperature
• To improve conductivity
• To protect the axon
• To release neurotransmitters

Multiple Choice

a signal molecule that transmits nerve impulses across synapses

• neuron
• neurotransmitter
• nerve
• action potential

Multiple Choice

nerve impulse

• action potential
• resting potential
• membrane potential
• synapse

Multiple Choice

part of a neuron that receives information from other neurons

• axon
• dendrites
• myelin sheath
• synapse

Multiple Choice

Location at which a neuron can transfer an impulse to another cell with the use of neurotransmitters is called __________.

• myelin sheath
• axon
• threshold
• synapse

Multiple Choice

The part of the neuron that takes information away from the cell body is called a(n) _____________.

• dendrite
• axon
• cell body
• Schwann cell

Multiple Choice

Which ions are involved in an action potential?

• Na; Cl
• Na; K
• K; Cl
• Na; Ca

Multiple Choice

Action potentials run along the ______ from ______ to ________.

• axon, dendrites, axon terminals

• axon, axon terminals, dendrites

• dendrites, axon, axon terminals

• axon terminals, axon, dendrites

Multiple Choice

What is the normal resting potential of a neuron cell membrane?

• +40mV
• -30mV
• +55mV
• -70mV

Dropdown

At resting membrane potential, neurons have more​ ​

Select answer

on the outside of the cell membrane.

Dropdown

At resting membrane potential, neurons have more​

Select answer

on the inside of the cell membrane.

Multiple Choice

A membrane potential becoming less negative is called

• hyperpolarization

• depolarization

• repolarization

• polarization

Multiple Choice

When a neuron is not engaged in an impulse.

• Resting potential
• Action potential
• Neural potential
• Synaptic potential

Reorder

Reorder the following (starting at beginning)

• Resting potential (-70mV), stimulus received

• Na+ gates open, threshold reached (-55 mV)

• Na+ gates open

• Na+ moves into the axon

• Action potential reached (+30mV)

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Reorder

Reorder the following (starting at the action potential)

• Action potential reached (+30mV)

• Na+ inactivation gates close, K+ gates open

• K+ exits the cell, repolarization

• K+ still open, goes below -70 mV, hyperpolarization

• Na/K pump restores to resting potential

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

Which of these is NOT a neurotransmitter?

• Acetylcholine

• Dopamine

• Serotonin

• Acetylcholinesterase

Multiple Choice

Where are neurotransmitters located within in neuron?

• axon terminals

• dendrites

• Schwann cells

• cell body

Multiple Choice

Location at which a neuron can transfer an impulse to another cell with the use of neurotransmitters is called ...

• myelin sheath

• axon

• threshold

• synapse

Multiple Choice

Neurotransmitters are released from the....

• Dendrites

• Post-synaptic neuron

• Presynaptic neuron

• Axon

Multiple Choice

What is the insulating membrane that surrounds parts of the axon that helps to protect & propagate action potential?

• Axon
• Dendrites
• Node of Ranvier
• Myelin Sheath

Multiple Choice

Which of the following will be the slowest moving nerve impulse?

• an axon covered with mylein sheaths (schwann cells)

• a large diameter axon

• an axon in warmer than normal temperatures

• unmyleinated axons

Multiple Choice

What number(s) on the graph represents the Resting Potential?

• 1 and 2
• 1 and 5
• 2 and 3
• 3 and 4

Multiple Choice

What number on the graph represents the Depolarization phase?

• 1
• 2
• 3
• 4

Multiple Choice

when does the stimuli cause an action potential?

• when it reaches threshold

• just below the threshold

• just above threshold