The ________ is the meeting place between neurons; is a gap or cleft.

• reuptake

• synapse

• threshold

• axon

_____ are chemical messengers released from a neuron by an action potential.

• synapse

• glial cells

• neurotransmitters

• reuptake

This occurs when a sending neuron reabsorbs or takes back its neurotransmitters.

• action potential

• refractory period

• all-or-none

• reuptake

These are your body’s natural painkiller.

• endorphins

• opiates

• glial cells

• hormones

A(n) _______ increases a neurotransmitters actions by mimicking.

• antagonist

• agonist

• dendrite

• reuptake

A(n) ________ decreases a neurotransmitters actions by blocking.

• antagonist

• agonist

• endorphin

• reuptake

______________ sense the outside world and bring it into your body.

• motor neurons

• sesnory neurons

• interneurons

___________________ carry signals out to your body so you can move.

• interneurons

• sensory neurons

• motor neurons

___________ are found in your brain and spinal cord and process information.

• interneurons

• sensory neurons

• motor neurons

A ___________ is a nerve cell and is the basic building block of the nervous system

• dendrite

• cell body

• endorphin

• neuron