The myelin sheath insulates neurons and speeds their transmission of signals.

The myelin sheath protects neurons from radiation damage.

The myelin sheath protects neurons from attack by pathogens.

The myelin sheath secures neurons in place.

The myelin sheath nourishes the neurons.

afferent neurons

efferent neurons

interneurons

brain neurons

They either occur, or they do not (i.e. there are no "half", or "semi" action potentials).

All of these

Action potentials occur either in very large quantities, or are scarce.

This is incorrect because action potentials may occur at various intensities, ranging from weak to strong.

None of these

Receptors, dendrites, cell body, axon, synaptic terminal

Receptors, axon, synaptic terminal, cell body, dendrites

Dendrites, cell body, axon, synaptic terminal, receptors

Dendrites, receptors, cell body, axon, synaptic terminal

Dendrites, axon, cell body, synaptic terminal, receptors

Myelin

Cerebrospinal Ffuid

Blood brain barrier

Dendrites

Astrocytes

A period immediately after a neuronal firing during which no additional neuronal firings can be completed.

A period when a neuron is unable to fire due to a lack of internal stimulation.

A period when a neuron fires hydrogen and carbon ions into the nearest glial cell.

A period when light is refracted onto the neuron's surface.

A period when a neuron requires less stimulation to fire at an intense level.

Synaptic gap

Axon

Axon terminal

Neurotransmitter vesicles

Myelin sheath

Sodium and potassium

Sodium and chloride

Potassium and calcium

Sodium and calcium

Sodium and oxygen

Action potential

Stimulus

Hyperpolarization

Absolute refractory period

Ionic equilibrium

Neurons have specialized parts called axons and dendrites, which help to send and receive information from other neurons.

Neurons do not have a nucleus.

Neurons have a smaller percentage of cytoplasm.

Neurons are only found in the bloodstream.

Neurons do not have a cell membrane or a cell wall.