Neural Communication

​Review Practice ?'s

Multiple Choice

Which neuron is responsible for taking sensory input (vision, hearing, touch, etc.) into the brain for processing?

• motor neurons

• sensory neurons

• interneurons

Multiple Choice

Which neuron is responsible for carrying messages from the brain to the muscles/glands?

• motor neurons

• sensory neurons

• interneurons

Multiple Choice

Which neurons are responsible for relaying messages between sensory and motor neurons?

• motor neurons

• sensory neurons

• interneurons

Multiple Choice

Which of the following are located exclusively within the brain and spinal cord?

• sensory neurons

• motor neurons

• interneurons

Neurons and Neural Transmission

Neural Transmission
An action potential is a brief electrical charge that travels down the axon.  As the electrical charge travels down the axon to the terminals, it helps to release the chemical messengers (neurotransmitters).  





Video

Look for in the video:

-action potential firing

-positive ions entering and exiting axon (selectively permeable)

-neurotransmitters in the synapse

A neuron is like a toilet...

Resting potential

All-or-none (reach threshold)

Action potential

Refractory

no reuptake

Multiple Choice

A function of dendrites is to

• receive incoming signals from other neurons

• release neurotransmitters into the spatial junctions between neurons

• coordinate the activation of the parasympathetic and sympathetic nervous systems

• control pain through the release of opiate-like chemicals into the brain

• transmit signals to other neurons

Multiple Choice

The longest part of a neuron is likely to be the

• dendrite

• axon

• cell body

• synapse

• neurotransmitter

Multiple Choice

The speed at which a neural impulse travels is increased when the axon is encased by a(n)

• soma

• myelin sheath

• dendrite

• synaptic cleft

• reuptake

Multiple Choice

A brief electrical charge that travels down the axon of a neuron is called the

• synapse

• axon

• action potential

• myelin sheath

• refractory period

Multiple Choice

The depolarization of a neural membrane can create a(n)

• action potential

• myelin sheath

• motor neuron

• reuptake

• interneuron

Multiple Choice

A gap between neurons that transmits neural messages to other neurons is called the

• dendrite

• synapse

• axon

• cell body

• vesicle

Multiple Choice

Neurotransmitters are released from vesicles located on the knoblike terminals at the end of the

• dendrites

• cell body

• terminal branches

• myelin sheath

• synapse

Multiple Choice

Neurotransmitters are chemical messengers that travel across the

• cell body

• synaptic gap

• axon

• myelin sheath

• threshold