Nervous System Key Vocabulary

Front

Reflex Arc

Back

A neural pathway that controls a reflex action.

Front

Central Nervous System

Back

The part of the nervous system consisting of the brain and spinal cord.

Front

Peripheral Nervous System

Back

The part of the nervous system outside the brain and spinal cord.

Front

Sensory Neuron

Back

A neuron that transmits sensory information to the central nervous system.

Front

Motor Neuron

Back

A neuron that conveys impulses from the central nervous system to a muscle or gland.

Front

Interneuron

Back

A neuron that transmits impulses between other neurons, especially as part of a reflex arc.

Front

Neurotransmitter

Back

A chemical substance that transmits signals across a synapse from one neuron to another.

Front

Synapse

Back

The junction between two neurons, where neurotransmitters are released.

Front

Stimulus

Back

A detectable change in the internal or external environment that elicits a response.

Front

Dendrite

Back

The branched projections of a neuron that receive signals from other neurons.