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Psych 3322- Exam 1

by: Madilene Williams

Psych 3322- Exam 1 Psych 3322 (Psychology: Brain and Behavior.)

Madilene Williams
Texas State

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About this Document

This study guide covers Topic 2 for Exam 1.
Brain and Behavior
Carmen Westerberg
Study Guide
psych, 3322, brain, and, behavior, exam1, Topic2
50 ?




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This 2 page Study Guide was uploaded by Madilene Williams on Friday September 16, 2016. The Study Guide belongs to Psych 3322 (Psychology: Brain and Behavior.) at Texas State University taught by Carmen Westerberg in Fall 2016. Since its upload, it has received 4 views. For similar materials see Brain and Behavior in Psychology And Social Behavior at Texas State University.

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Date Created: 09/16/16
Friday, September 16, 2016 Psych 3322- Exam 1 Topic 2 - Nervous system= “coordinates actions and transmits signals to different parts of the body.” - Two types of cells are found in the nervous system= neurons and glia. - Function of neurons= transmits information. (info processing) - Neuron doctrine= Santiago Ramón y Cajal- there are independent nerve cells/ neurons separated by synapse, which is where messages travel across. - Four basic parts of a neuron, and what is the function of each= cell body, dendrites, axon, and axon terminal.// Cell Body- helps keep the cell alive./ Dendrites- receives information from other cells./ Axon- electrical impulses travel down the axon to send a message./ Axon Terminal- where the actual messages are released. - Contains the cell nucleus= cell body. - The purpose of dendritic spines= receive info from other cells. - Axon hillock= where the axon connects to the body (electrical) - Axon collateral= each separate branch of the axon. (are located at the bottom of the axon/ the branches.) - Synapse= a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter. - Synaptic vesicles= Any of several small, intracellular, membrane-bound vesicles at a synaptic junction of neurons that contain the neurotransmitter. - The difference between a presynaptic neuron and a postsynaptic neuron= presynaptic neuron is a neuron before it’s connected to another neuron; postsynaptic is opposite. - Three general shapes of neurons= multipolar= one axon and multiple dendrites/ bipolar= one axon and one dendrite/ unipolar= a single extension branches into two directions. (check Pg. 25 for diagram) 1 Friday, September 16, 2016 - The primary function of glia= (glue) helps keep the neurons alive (helping with communication); plays a small role in processing information. (The 4 glia cells= oligodendrocytes, Schwann cells, astrocytes, and microglial cells.) - What do oligodendrocytes (brain and spinal cord) and schwann( in other parts of the body) cells do?= they wrap around successive segments of axons to insulate them with a fatty substance called myelin. - It is important to have Myelin Sheath because…= it helps conduct electrical impulse quickly. - The nodes of Ranvier= the gaps in the myelin sheath. - Tthe cause of multiple sclerosis= losing the myelin sheath that are covering their axons. Different axons uncovered = different symptoms. - Three functions of astrocytes= (star-shaped cells)- 1) help form the outer membrane in the spinal cord and brain? 2) help control blood flow in neurons. (the feet wrapped around the blood vessel. 3) help synchronize the activity of neurons/ secretes the chemical, when stopped, the neuron activity is synchronized./ synchronized helps sending stronger message. - The main function of microglia= Removes debris after injuries. - Two dangerous aspects of glia= 1) if injured, the glial cell will swell up (edema) which could damage your neurons. 2) Continuously dividing, could possibly form tumors from too much dividing (glioma= glial cells forming this tumor.) Note: There are many diagrams in Ch.2 that are very helpful for showing where some of these terms are in the brain and what they look like; These diagrams start on Pg. 23 in chapter 2 of your book. The study guide covering Topics 3 & 4 are also on Study Soup! Good Luck!! 2


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