Neurons

Axon

Axon Terminals

Cell Body

Dendrite

Motor Neuron

Sensory Neuron

Spinal Cord

Synapse

Axon terminals

Nerve messages leave the neuron here.

Cell Body

Large part of a neuron that contains the nucleus and other organelles.

Dendrites

Nerve impulse enters or is picked up by the neuron here.

Axon

Long extension of a neuron that carries a nerve impulse away from the cell body.

Synapse

The space between two neurons

Sensory Neuron

Type of neuron that carries a nerve impulse from a sense organ towards the brain or spinal cord.

Motor Neuron

Type of neuron that carries a nerve impulse away from the spinal cord or brain to a muscle or gland.

Nerve

A bundle of neurons.

Receptors

Special nerve endings that are sensitive to specific stimuli.

Neuron

A nerve cell.

Stimulus

Any change in the environment which causes a response.

Nerve Impulse

Information from a stimulus that travels along a nerve fiber

Sense Organ

Type of organ that receives a stimulus from the environment.

Neuron

Type of cell in a nervous system that transfers information.

Muscle or Gland

Type of organ that receives a stimulus from a motor neuron.

Nervous System

Organ system that allows transfer of information from sense organs to effector cells such as muscles. Also provides the ability to store, retrieve, and understand sensory information.

Neurotransmitter

chemical that carries a nerve impulse across a synapse

central nervous system

consists of the brain and spinal cord.

peripheral nervous system

consists of sensory organs, sensory neurons, and motor neurons.

Toward cell body

Direction of nerve impulse in a dendrite

Away from cell body

Direction of nerve impulse in an axon

Toward the axon

Direction of nerve impulse in a cell body