Name: _____________________________ Date: ________________ Block: A B C D Divisions of the Nervous System The nervous systems gathers information from the body’s ___________________ and ________________ environments and then __________________ to that information. The two divisions of the nervous system are: 1) ________________________________ 2) ________________________________ The CNS includes a) _____________________ b) _____________________ The PNS is made up from _________________________________________________ Draw the flow of an impulse going from outside of your body, to the brain and back to a response. Be sure to label: stimulus, sensory neuron, spinal cord, brain, interneuron, motor neuron

4

5

6 1

3 2

The brain and the spinal cord are made up of these types of neurons__________________ Your brain is made up of about ________________ neurons. The brain controls both _____________________ and ____________________ processes. The three main regions of the brain are 1) _________________ 2) __________________

3) ______________

The cerebrum _________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ It is divided into two halves called ________________________ The right hemisphere controls the ____________ side of the body while the left hemisphere controls the ___________ side of the body. The right side of the brain is best used for: a) ______________________ b) ______________________ The left side of the brain is best used for: a) ____________________________ b) ____________________________ What is a concussion? ____________________________________________________ ____________________________________________________________________ ____________________________________________________________________ The cerebellum ________________________________________________________ ____________________________________________________________________ The brain stem ________________________________________________________ such as a) __________________________ b) __________________________ c) ___________________________ d) ___________________________

Label the brain diagram below:

The spinal cord _________________________________________________________ Impulses in the nervous system are _________________ messages that can travel as fast as _________________ or as slow as __________________. What are nerves? _______________________________________________________ ____________________________________________________________________ Most nerves contain _____________________________________________________ The peripheral nervous system is made up of ___________________________________ ____________________________________________________________________ There are ________ pairs of cranial nerves and _________ pairs of spinal nerves. Like the central nervous system, the peripheral nervous system controls both ____________________ and _________________ actions. Axons can be as long as _____________ in length or very short.

Label the neuron below using the following terms: cell body, nucleus, dendrites, axon, myelin sheath, Schwann cell, axon tips

A G B D

C

E

F

Sensory neurons send information ________________ the brain, _________________ process the impulse in the brain and _______________________ sends the impulse to muscles, glands or organs to respond.

The nerves of the peripheral nervous system are broken down further into two groups: 1) ____________________________ which control voluntary actions such as tying your shoe or filling in these notes 2) ____________________________ which control involuntary actions such as your pupils dilating with a room darkening A reflex is ____________________________________________________________ ____________________________________________________________________ Why do we have reflexes? ________________________________________________ Some reflexes only travel to the _____________________ before the impulse is sent back out to respond.

Complete the diagram below to show the path of a reflex.