Name:_______________________________________ Date_______________
Period ____________
Nervous System Notes
Nervous System Vocabulary to Know
• _____________________________________ – The regulation of steady, life-maintaining
conditions inside an organism, despite changes in its environment…__________
________________________________________________________________________________________
Examples of homeostasis:
• ___________________________________________
• ___________________________________________
• ___________________________________________
•
________________________________________ – Any ___________________________(inside or
outside of the body) that brings about a response.
Examples:
• ___________________________________________
• ___________________________________________
• ___________________________________________
•
___________________________________ – An ___________________________________due to the
application of a stimulus.
Major Parts of the Nervous System
• ___________________________________ – The main control center
• ___________________________________– The main highway for transmitting sensory
information
• ___________________________________ (nerves) – the signal carriers
Major functions of the nervous system
• ___________________________________– gathering _________________________________about
the world around you _____________________________________________________________.
Examples include
• an odor (olfactory)
• a flash (visual),
• a noise (audio)
• a bump (tactile and kinesthetic)
• a taste (gustatory).
•
• ___________________________________ – The interpretation and understanding of the
signals sent from the senses. _______________________________________________________
____________________________________________________________________________________________
___________________________________– The brain sends a response out.
Example:
________________________________________________________________________________
________________________________________________________________________________
•
Name:_______________________________________ Date_______________
Period ____________
Nervous System
• The nervous system can be divided into two main segments
I.
___________________________________
II.
___________________________________
Color the central nervous system green and the peripheral nervous system yellow
Functions of the Central Nervous System
• CNS Functions:
______________________________________________________________________ from the
environment.
It ______________________________________________________________________to tell them to
move or stay stationary.
It ______________________________________________________________________to function.
The Brain
• ______________________________________________________________________
• Made up of approximately 100 billion neurons (nerve cells)
• Divided into three major parts
___________________________________ – label and color yellow
___________________________________ – label and color blue
___________________________________– label and color red
Name:_______________________________________ Date_______________
Period ____________
The Spinal Cord
• ___________________________________- The _____________________________________________
_______________________________________________________________________________________
• It is made up of _____________________________________________________________from all
parts of the body to the brain and from the brain to all parts of your body.
Peripheral Nervous System
• Peripheral Nervous System - Connects the body to the brain and the spinal
cord.
• Bundles of nerves throughout the body
• ___________________________________– Receive information and ____________________
______________________________________________________________________________________
• ___________________________________– Conduct impulses ____________________________
____________________________________ to muscles or glands throughout your body.
The Neuron
Color and label all of the parts of the neuron. Be sure to indicate the direction that the
nerve impulse travels.
Name:_______________________________________ Date_______________
Period ____________
Two Divisions of the Peripheral Nervous System:
1. _______________________________- Controls ___________________________________________,
like raising your arm / hand to answer a question.
2. _______________________________ – controls the ______________________________________,
like those not under conscious control-such as your heart rate, breathing, and
digestion.
Reflexes
• _______________________________– _____________________________________________________
___________________________________________________to a stimulus.
• Involves a simple nerve pathway called a reflex arc – to the spinal cord and
straight back
• A very fast response!
• Examples of Reflexive behaviors
______________________________________________________________
______________________________________________________________
______________________________________________________________
______________________________________________________________