Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

biological psychology

a branch of psychology concerned with the links between biology and behavior


a nerve cell; the basic building block of the nervous system

sensory neurons

neurons that carry incoming information from the sensory receptors to the brain and spinal cord

motor neurons

neurons that carry outgoing information from the brain and spinal cord to the muscles and glands


neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs


the busy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body


the extensions of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles or glands

myelin sheath

a layer of fatty tissue segmentally encasing the fibers of many neurons; enabled vastly greater transmission speed of neural impulses as the impulse hops from one node to the next

action potential

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


the level of stimulation required to trigger a neural impulse


the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. the tiny gap at this junction is called the synaptic gap or synaptic cleft.


chemical messengers that cross the synaptic gaps between neurons. when released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse


a neurotransmitter's reabsorption by the sending neuron


natural, opiatelike neurotransmitters linked to pain control and to pleasure

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording