Running Head: Module 2 Quiz Items Katelyn L. DuncanDr. PritchardPSY-150-IT122 January 2019Module 2 Quiz Items1.A neuron is also called a nerve cell, these cells do not regenerate. These neurons are building blocks that comprise our nervous systems and transmit signals when stimulated by senses or neighboring neurons. The neuron is made up of three basic parts, which include the soma, dendrites, and axon. The soma is also known as the cell body, which contains all the things necessary in a cell (nucleus, DNA, mitochondria, and ribosomes). The soma is the neurons life support. The dendrites are short, branch like structures that receive messages from other cells, and relay messages back to the soma. Finally, the axonis long and sometimes enclosed in a protective layer of fatty tissue. The protective layer is known as the myelin sheath. This myelin sheath protects the axon and speeds up the transmission of messages (Green, 2014, Video 3). 2.A synapse is a contact point between neurons, so that when a neurotransmitter leaves an axon it is passed through the synapse, and caught on the receptor sites, also known as dendrites. These neurotransmitters that are passed through these neurons are biochemical substances that play a role in the way we behave, learn, feel, and sleep (allpsych.com, n.d.). Reuptake refers to the process in the brain where neurons retrieve chemicals that were not received by the next neuron, that neuron’s nerve ending then absorbs the neurotransmitter that is has secreted (alleydog.com, n.d.).
Running Head: Module 2 Quiz Items 3.Each neurotransmitter plays a different role when it comes to influencing behavior. Acetylcholine is a neurotransmitter that is involved in voluntary movement, learning, memory, and sleep. Acetylcholine, when there is an excessive amount, is associated with
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