Module 9: Neurotransmission

The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron.

• axon

• synapse

• dendrite

• vesicle

The part of the neuron that contains the nucleus; the cell's life support system.

• glial cell

• dendrite

• axon

• cell body

A layer of fatty tissue that insulates the axon and speeds their impulse.

• myelin sheath

• threshold

• dendrite

• axon

A neuron extension that passes messages through its branches to other neurons or to muscles or glands.

• action potential

• axon

• glial cell

• dendrite

The bushy, branching extension of a neuron that receives and integrates messages, conducting impulses toward the cell body.

• dendrite

• axon

• vesicle

• synapse

A neurotransmitters reabsorbtion by the sending neuron.

• all-or-none response

• synapse

• action potential

• reuptake

Cells in the nervous system that support, nourish, and protect neurons; they also play a role in learning, thinking, and memory.

• dopamine

• serotonin

• glial cells

• myelin cells

The level of stimulation required to trigger a neural impulse.

• reuptake

• all-or-none response

• threshold

• refractory period

A neurons reaction of either firing (with a full length response) or not firing.

• all-or-none response

• refractory period

• threshold

• action potential

A neural impulse; a brief electrical charge that travels down an axon.

• neurotransmitter

• action potential

• all-or-none response

• threshold