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Nervous System
nervous system
18
Science
7th Grade
02/23/2011

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Cards

Term
What does the nervous system regulate?
Definition
Most body systems using direct connections called nerves.  It allows you to sense and responds to change (stimuli)
Term
What are the functions of the nervous system
Definition
  • receive stimuli (changes in the environment)
  • respond to stimuli
Term
What organs are included in the nervous system?
Definition
  1. brain
  2. spinal cord
  3. sense organs (eyes, ears, taste buds, touch, nose)
  4. nerves
Term
What is the difference between a nerve and a neuron?
Definition
There is no difference.  They are the same thing.
Term
What are neurons?
Definition
The functional units of the nervous system. They allow the nervous system to do its job of receiving and responding to stimuli and sending messages about that.
Term
List the three parts of a neuron?
Definition
  1. dendrite
  2. cell body
  3. axon
Term
List the functions for each part of a neuron.
Definition
  1. dendrite:  receive messages and carry impulses toward the cell body

  2.  cell body:  contains the nucleus which directs the message to be continued

 

  3.  axon:  carries impulses away from the cell body to another cell

Term
list the 2 types of neurons
Definition

sensory neurons

 

motor neurons

Term
what is the function of each type of neuron?
Definition

sensory neurons:  picks up stimuli and converts it to a nerve impulse

 

motor neurons:  sends an impulse to a muscle or gland causing a response

 

Term

What direction does the nerve message (impulse) travel through the nerve?

Definition
Begins in the dendrite and quickly moves towards the cell body and then down the axon
Term

What are the two divisions of the nervous systems? (do not abbreviate)

Definition
  • central nervous system
  • peripheral nervous system

 

Term
What does the central nervous system include?
Definition
  • brain
  • spinal cord
Term
What does the peripheral nervous include?
Definition
all the nerves not included in the brain and spinal cord
Term

What are the three major parts of the bain and what do each control:

Definition
  1. cerebrum:  interprets input from senses, controls movement, conscious activity, memory, and language
  2. cerebellum:  balance, posture, and coordination
  3. brain stem:  controls involuntary activities
Term
What is the function of spinal cord?
Definition
  • links the brain to the rest of the body
  • sends messages to and from the brain
Term
What are the two divisions of the peripheral nervous system?
Definition
  • somatic nervous system
  • autonomic nervous system
Term
What does the somatic nervous system regulate?
Definition
voluntary actions (using a fork, writing with a pencil ...)
Term
What does the autonomic nervous system regulate?
Definition
involuntary actions (heartbeat, blinking ...)
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