Psych 101 Ch 4

Psych 101 Ch 4 - Psych 101 1-31-08 Chapter 4: The Brain 1....

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Psych 101 1-31-08 Chapter 4: The Brain 1. Neurons a. Neurons: Basic building blocks of the nervous system b. Functions: Generate electrical activity, communicate with muscles, glands and other neurons i. Does 2 important things 1. Generates the electricity that creates the nerve impulse 2. Release chemicals that allow communication with other neurons 3. Look at figure 4.3 c. Anatomy of a neuron i. Dendrites (receiving messages from other neighboring neurons) 1. They receive messages as chemical impulses form other nerve cells that are then converted to the electrical cell (?) ii. Axon iii. Myelin Sheath-fatty substance 1. Improves efficiency iv. Soma (cell body) 2. Resting potential: -70 mV (look at graph: voltage vs. time) 3. Synthesis of neurotransmitters Storage in synaptic vesicles Release into synaptic space Binding to receptor sites Deactivation through reuptake or breakdown 4. Types of Neurotransmitters a. Acetylcholine (Ach) i. Involved in memory and muscle activity: 1. Memory loss-Alzheimer’s, Paralysis (absence of…), Muscle Contractions (abundance of…) b. Norepinephrine (NE)
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i. Involved in learning, memory, wakefulness, and eating:
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Psych 101 Ch 4 - Psych 101 1-31-08 Chapter 4: The Brain 1....

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