1. The Nervous System
By: Skylar and Morgan

2. Teaching points
Neurons transmit messages and contain 6 important components.
The neurons send nerve impulses using action and resting potential.
The CNS is made up of the spinal cord and brain, while the PNS is composed of all the remaining nervous tissue.
The PNS has 2 subdivisions; somatic and autonomic.
The nervous system helps to maintain homeostasis.

3. https://www.brainp op.com/health/bodysystems/nervoussystemuy/
Video Time
op.com/health/bodysystems/nervoussystemuy/

4. Neurons
Function
Electrical cells that process, feed and transmit information throughout the nervous System
Structure
Dendrite: receives messages from other neurons
Axon: sends messages to other neurons
Cell Body: the protection of the neuron and is the
control center for the cell
Myelin Sheath: speeds up the message transportation rate

5. Neurons (continued) Types of neurons
Motor: carry from CNS to muscles and glands
Sensory: carry from PNS to CNS
Interneurons: carry impulses between motor and sensory

6. Nerve Impulses and how to “send” them
Resting potential: When a neuron is not stimulated or involved in passage of an impulse or sending and receiving a message
Outside of neuron is positively charged, inside is negatively charged
Action potential:
The change in electrical potential and the change in charge. The passage of an impulse along the membrane of a muscle cell or nerve cell.
Reversal of charges
Electrical and chemical signals

7. Action Potential
Resting potential

8. Peripheral Nervous System
The part of the nervous system that consists of the nerves and ganglia on the outside of the brain and spinal cord.
The PNS connects to the central nervous system and acts as a communication and transportation wave.
Connects to all organs and limbs.

9. Central Nervous System
Brain: nervous tissue contained in the skull of vertebrates, functioning as the coordinating center of sensation and nervous activity.
Cerebrum: largest, controls conscious functions
Cerebellum: just below cerebrum, controls bodily movements
Brain stem: lowest, controls involuntary functions
Spinal Cord: cylindrical bundle of nerve fibers and associated tissue that is enclosed in the spine and connects nearly all parts of the body to the brain
Purpose of spinal cord: allows body to send signals

10. Somatic and Autonomic Somatic: voluntary and reflexes -singing -biking
-writing
Autonomic: involuntary actions
-digesting food
-contracting your bladder
-heart beats

11. Homeostasis
Teaching point: The nervous system helps maintain homeostasis throughout the body.
Examples in muscle,respiratory and endocrine systems
“any self-regulating process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival” from