MD Activity 2.1 and 2.2

The long extension from a nerve cell along which signals travel.

• axon
• dendrite
• synapse
• neuron
• receptor

A branch extending from a neuron that receives signals from another neuron through a synapse.

• dendrite
• axon
• myelin
• motor neuron
• impulse

A fatty substance that surrounds the axon and increases the speed at which signals travel.

• myelin
• dendrite
• neurotransmitter
• receptor
• nucleus

A nerve cell that sends signals or transmits nerve impulses.

• neuron
• axon
• gland
• brain stem
• tissue

Chemicals that assist in passing a signal through the synapse.

• neurotransmitter
• dendrite
• enzyme
• hormone
• lipid

The gap between the branches extending from a neuron's axon that sends a signal to the next neuron.

• synapse
• myelin
• axon
• motor neuron
• junction

The part of the nervous system that includes the brain and spinal cord.

• central nervous system (CNS)
• peripheral nervous system (PNS)
• sensory system
• muscular system
• circulatory system

Nerve cells that pass signals from the brain or spinal cord to a muscle or gland.

• motor neurons
• sensory neurons
• interneurons
• receptor cells
• dendrites

A bundle of neurons.

• nerves
• cells
• tendons
• tissues
• vessels

The part of the nervous system that includes nerves and is not part of the brain and spinal cord.

• peripheral nervous system (PNS)
• central nervous system (CNS)
• skeletal system
• circulatory system
• respiratory system