Psych Notes Ch. 2 - C h. 2: The Brain and Behavior...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch. 2: The Brain and Behavior Communication with the brain: Neuron : cell in nervous system that receives, integrates, amd transmits information o Come in a wide variety of shapes and sizes Parts of the Neuron Dendrites : receive messages from other neurons Soma : cell body Cell Nucleus : Life support of neuron Axon : long thin fiber that transmits signals Myelin sheath : insulating material that coats axons and speeds transmission of info Terminal buttons : small knobs that secrete neurotransmitters to transmit the neuron’s message to next neuron Synapse : junction between neurons where info is transmitted from one neuron to another How does a neuron transmit info? Action potential travels down axon to terminal buttons o Action potential: brief electrical charge When action potential reaches terminal fibers, they release neurotransmitters o Neurotransmitters: chemical messengers released from terminal branches that travel across synapse to stick to dendrites of other neurons. When enough neurotransmitters bind to receptor sites on the next neuron’s dendrites, it causes the neuron to fire o This is an “all or nothing” phenomenon (once it gets enough neurotransmitters it WILL fire) Neurotransmitters (pg. 48 and 49)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Several types, each with specialized functions- DO NOT need to know every type and what it does for exam o Receptors on dendrites are specialized: only certain neurotransmitters can bind to them Reuptake : the process of reabsorbing unused neurotransmitters Agonists : chemical that mimics action of neurotransmitters causing similar affects o Example: Morphine Antagonists : chemical that opposes the actions of a neurotransmitter o Drugs that block the release of neurotransmitters o Example: Botox Other cells in the brain? Glia cells
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/07/2011 for the course PSYCH 36-087 taught by Professor Welsh during the Fall '10 term at University of Georgia Athens.

Page1 / 6

Psych Notes Ch. 2 - C h. 2: The Brain and Behavior...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online