Nervous System

What is an action potential?

• the chemical released at the end of an axon terminal

• an electrical signal that travels down the cell membrane of a neuron

• an electrical signal that travels down the cell membrane of a nerve

• a stimulus that causes the neuron to get excited

What is an neurotransmitter?

• the chemical released at the end of an axon terminal

• an electrical signal that travels down the cell membrane of a neuron

• an electrical signal that travels down the cell membrane of a nerve

• a stimulus that causes the neuron to get excited

Tags

NGSS.HS-LS1-6

If a person has a broken neck that damages the spinal cord at C2, what are the probable consequences?

• no problems will occur

• the patient will lose sensory from their lower extremities only

• the patient is a paraplegic

• the patient is a quadriplegic

When an neuron receives a sufficiently strong stimulus, what happens first?

• The Na+/K+ resets the membrane potential

• Na+ gates open causing the cell to depolarize

• K+ gates open causing the cell to repolarize

• Ca+ gates open causing the neuron to release a neurotransmitter

After the cell has depolarized, what happens next?

• The Na+/K+ resets the membrane potential

• Na+ gates open causing the cell to depolarize

• K+ gates open causing the cell to repolarize

• Ca+ gates open causing the neuron to release a neurotransmitter

What is the fatty substance produced by glial cells that insulates the axons of some neurons?

• refractory period

• dopamine

• Nodes of Ranvier

• myelin

A quick, involuntary response by the body to a potentially damaging stimulus is a called

• reflex

• action potential

• twitch

• spinal cord

What is labeled H?

• sensory neuron

• motor neuron

• interneuron

• ventral root

What is labeled G?

• sensory neuron

• motor neuron

• interneuron

• ventral root

What is labeled P?

• sensory neuron

• motor neuron

• interneuron

• ventral root