Thinking Assignment

Topics: Neuron, Action potential, Axon Pages: 2 (300 words) Published: August 26, 2014
Biological Basis of Behavior Assignment
Label the following on the neuron by clicking on each labeled arrow and dragging it to point to the correct location: Dendrite, Axon, Cell Body, Myelin Sheath, Terminal Branches of the Axon

Cell Body

Dendrite

Terminal Branches of the Axon
Myelin Sheath

Axon

A
Briefly describe the role each of the following play in neural communication: 1. Dendrite: branching neuron structures that receive neural impulses from other neurons and convey impulses toward the cell body

2. Axon: long tube like structure that conveys impulses away from the neurons cell body toward other neurons/muscles or glands

3. Cell Body: part of the neuron containing the cell nucleus as well as other structures that help the neuron carry out its functions; also known as the soma

4. Myelin Sheath:layer of fatty insulation wrapped around the axon of some neurons, which increases the rate at which nerve impulses travel along the axon.

5. Terminal Branches of the Axon: junctions with other cells that releases chemicals called neurotransmitters.

6. Action Potential (here also describe threshold): level of stimulation received when a neuron is in its resting state and it determines if an electrical signal or neural impulse will be created or not. If the threshold is met, the neural impulse will form and be sent down the axon. If not, the impulse won't occur.

7. Synapse: small gap between neurons.

8. Neurotransmitters: are chemicals that are released by the sending neuron that activates the receptors on the receiving neuron.

9. Reuptake: the remaining neurotransmitter molecules in the synaptic gap goes back up by the sending neuron.

10. Describe how an SSRI antidepressant medication works. SSRI stands for selection serotonin reuptake inhibitor. SSRI's works by slowing the reuptake of the serotonin in the brain. The higher level in the synaptic gap helps to overcome depression and enhance moods.

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