31.1 The Neuron

What is the function of the nervous system?

• Transport nutrients around the body
• Send and receive messages to respond to a change in an organisms environment
• Brings oxygen into the body
• Moves body parts

The Brain and Spinal Cord make up the 

• Peripheral NErvous System
• Central Nervous System
• Sensory Nervous System
• Motor Nervous system

A stimuli is a(n)-

• feeling or physical reaction
• something that causes us to act
• a response to an event
• change in the environment

______ send signals away from neurons whereas ______ receive signals from other neurons. 

• dendrites; axons
• axons; dendrites
• synapses; dendrites
• axons; synapses

Which of the following are the parts of neurons?

• brain, spinal cord, and vertebral column
• dendrite, axon, and cell body
• sensory and motor
• cortex, medulla and sheath

The structure labeled D is the

• axon
• dendrite
• soma
• presynaptic cell

A signal molecule that transmits nerve impulses across synapses

• neuron

• neurotransmitter

• nerve

• action potential

What is the fatty tissue around the axon that helps messages travel quicker?

• axon

• dendrites

• synapse

• myelin sheath

What do neurotransmitters bind to?

• receptors

• vesicle

• axon

• other neurotransmitters

Which of the following is NOT a type of neurons ? May be more than one.

• sensory

• motor

• interneuron

• autonomic