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Neuroscience and Behavior

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PSY 102: Psychology in the Modern World Your Name: Dahiana Then

Instructor: Bob Melara Your Section: C3

Fall 2015 Your TA’s Name:

** Answer the questions in your own words, Type you answers, make sure you answer all parts, print the answered homework and take it with you to your next recitation! Only the two lowest homework grades can be dropped **

Homework #2 (Neuroscience and Behavior)

1. a) What are the parts of a neuron? b) How are neural impulses generated? c) How does one nerve cell communicate with another?

The human body is composed of countless cells, all obtaining a specific purpose in our bodies. One of the most important elements that contribute to the make up of the human body are neurons. A neuron is a nervous system cell, responsible for transmitting pieces of information throughout our bodies by creating messages that are relayed throughout the body. There are two main components that make up a nerve cell (neuron), those of which include the axon and dendrites. The axon of a neuron is the specific fragment (that can be long or short) of the nerve cell that is in charge of transferring messages through its branches to other parts of the human body (other nerve cells, muscles, glands). The dendrites of a neuron are the specific fragments (short fragments) that are in charge of accepting messages that are sent from other parts of the human body. The dendrites are also in charge of relaying electrical signals to the cell body or nucleus. Neural impulses are generated due to an achieved chemical balance within the cell that allows the impulses to be created. When a cell is at rest, and not generating any impulses or messages, the ion channels that control the inflow of a chemical (Na: Sodium) are closed. This separates the sodium from the inside of the cell, resulting in what is known as an unstimulated

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