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Chapter 3

Chapter 3 Week 3

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PSY 105
Tsasha Awong

Week 3 Chapter 3: Neuroscience & Behaviour : Levels of Analysis : Neurons: A neuron is made up of three parts: cell body that houses the chromosomes with the organisms DNA and maintains the health of the cell, dendrites that receive information from other neurons and an axon that transmits information to other neurons muscles and glands. Theres small gaps between the axon of one neuron and the dendrites or cell body of another, this gap are part of synapse: the junction or region between the axon of one neuron and the dendrites or cell body of another. Three major types of Neurons: 1. Sensory: receives information from the external world and covey this information to the brain via the spinal cord 2. Motor: carrys signals from spinal cord to the muscles to produce movements 3. Interneurons: which connect sensory neurons, motor neurons and other interneurons. What Are Neurotransmitters? Are released in the synapse Is a means of communication between cells e.g., acetylcholine (memory & learning), dopamine (pleasure, movement), serotonin (mood, appetite), norephinephrine (mood, sleep), GABA (inhibition), glutamate (memory) Types of Neurotransmitters: 1. Acetylcholine: a neurotransmitter involved in a number of functions, including voluntary motor control. 2. Dopamine: that regulates motor behavior, motivation, pleasure and emotional arousal 3. Glutamate: is a major excitatory neurotransmitter involved in information transmission throughout the brain 4. Norepinephrine: a neurotransmitter that influences mood and arousal www.notesolution.com
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