Download Nervous System Notes

Nervous System Notes
Function of the nervous system
STUCTURE OF THE NERVOUS SYSTEM
Nervous system can be broken down to two parts, the __________
and the _________________ nervous system
Central Nervous System- control center of the body
Brain-_______________________________
- made of interneurons
Cerebrum-______________ input from the senses,
______________ movement and carries out complex
mental processes such as ______________ and
___________________.
Cerebellum-____________ the actions of your muscle (__________)
Brain Stem- controls your body’s __________________ (heart beat)
Spinal Cord
Peripheral Nervous SystemNetwork of nerves that branch out from the central nervous system and
connect the rest of the body.
Structure of a Nerve Cell
Neurons-
.
.
A neuron has a large ________________ that contains the ________,
_______________ threadlike extensions on the cell body
that carry impulses toward the neuron’s cell body.
____________ carries impulses away from the cell body.
Type of neurons
1. Sensory Neurons- pick up _______ from the internal or
external ___________ and convert into a nerve impulse.
2. Interneurons- are neurons that carry impulses from one
________________________
3. Motor Neurons- sends an impulse to a muscle or gland to react in
response.
How an Impulse is Transferred:
- The junction where one neuron meets another and
an impulse is transferred is called a synapse. For a
nerve impulse to be carried along at a synapse, it must
cross the gap between the axon and the next structure. The axon tips
release chemicals that carry the impulse across the gap.
http://library.thinkquest.org/25500/emotions/media/neuron.gif
Nervous System Notes
Function of the nervous system
The nervous system receives information about what is happening both
inside and outside your body. It also directs the way in which your body
responds to this information. In addition, your nervous system helps
maintain homeostasis.
STUCTURE OF THE NERVOUS SYSTEM
Nervous system can be broken down to two parts, the central
and the peripheral nervous system
Central Nervous System- control center of the body
Brain-controls all the functions of your body
-made of interneurons
Cerebrum-interprets input from the senses, controls
movement and carries out complex mental
processes such as learning and remembering.
Cerebellum-coordinates the actions of your muscle (balance)
Brain Stem- controls your body’s involuntary actions (heart beat)
Spinal Cord- link between your brain and the peripheral nervous system.
Peripheral Nervous SystemNetwork of nerves that branch out from the central nervous system and
connect the rest of the body.
Structure of a Nerve Cell
Neurons or nerve cells are the cells that carry information through your
nervous system
.
A neuron has a large cell body that contains the nucleus,
dendrites threadlike extensions on the cell body that
carry impulses toward the neuron’s cell body.
axon carries impulses away from the cell body.
Type of neurons
1. Sensory Neurons- pick up stimuli from the internal or
external environment and convert into a nerve impulse.
2. Interneurons- are neurons that carry impulses from
one neuron to another.
3. Motor Neurons- sends an impulse to a muscle or gland to react in
response.
How an Impulse is Transferred:
- The junction where one neuron meets another and
an impulse is transferred is called a synapse. For a
nerve impulse to be carried along at a synapse, it must
cross the gap between the axon and the next structure. The axon tips
release chemicals that carry the impulse across the gap.
http://library.thinkquest.org/25500/emotions/media/neuron.gif