BIOLOGY AND BEHAVIORThe Nervous System

OBJECTIVE

Explain how messages are transmitted by neurons, and describe the functions of the spinal cord and the peripheral nervous system.

TODAY’S GOALS

Activity—Dance, Label Synapse and Neuron Notes on Biological Psychology, Nervous

System, and Neurons.

BIOLOGICAL PSYCHOLOGY

http://education-portal.com/academy/lesson/intro-to-biological-psychology.html#transcript

NERVOUS SYSTEM

What does the Nervous System do? Nervous system is the body’s internal

communication system. It contains 2 main parts

The Central Nervous System The Peripheral Nervous System

NEURONS Neurons- Nerve Cells that run through our

entire bodies and communicate with each other

More than 100 billion neurons (most found in the brain)

Neurons send and receive messages from other structures in the body.

COMMUNICATION PROCESS

Messages are sent from the Axon Terminals of one neuron to the dendrites of other neurons.

Message must cross the synapse Synapse is a junction (space) between the

axon terminals of one neuron and the dendrites of another neuron

COMMUNICATION PROCESS

Sensory Neurons: nerve cells that carry info received by the senses TO the central nervous system

Motor neurons: nerve cells that carry info FROM the central nervous system to the muscles and the glands and influence their functioning.

NEUROTRANSMITTERS: CHEMICAL MESSENGERS

Neurons send messages across the synapse through the release of neurotransmitters

Neurotransmitters: Chemicals that are stored in sacs in the axon terminals

Neuron fires or sends its message by releasing neurotransmitters

http://www.youtube.com/watch?v=p5zFgT4aofA

http://education-portal.com/academy/lesson/neurons.html

CENTRAL NERVOUS SYSTEM

Consists of the Brain and the Spinal Cord The Spinal Cord transmits messages between the

brain the muscles and the glands through out the body.

Spinal Reflex: simple, automatic response to something

Ex. Hot Stove Message goes immediately from his or her hand to the spinal cord. Message toremove hand is sent back toMotor neurons in the hand to remove the hand.

PERIPHERAL NERVOUS SYSTEM

Lies outside the central nervous system and is responsible for transmitting messages between the central nervous system and all parts of the body.

2 parts of the PNS Somatic Nervous System (SNS) Autonomic Nervous System(ANS) http://

education-portal.com/academy/lesson/nervous-system.html

COLOR IN YOUR CNS, PNS, AND ANS

Color in the 3rd page of your neuron packet Write down 3 examples of Autonomic

Nervous System(ANS). Write down 3 examples of your Somatic

Nervous System (SNS).