Nervous+System+HW+KR

=Nervous System Homework=

Keaton Rye
The two major divisions of the nervous system are the central nervous system and the peripheral nervous system.
 * 1. What are the two major divisions of the nervous system?**

sensory neurons, interneurons, and motor neurons.
 * 2. What are the three types of neurons?**

the cell body, dendrites, and an axon.
 * 3. What are the three parts of a neuron?**

4. **What is a nerve impulse and how does it spread (this requires a long answer).** Nerve impulses convey information within the nervous system. Measuring nervous impulses uses axons and a voltmeter to measure voltage. When the axon is not an impulse, the voltmeter records a membrane potential at about -65 mV this is resting potential.

5**. Since neurons don't physically touch, how is an impulse transmitted from one neuron to the next?** Neurons can transmit impulses across to one another due to neurotransmitter molecules. These molecules are released when signaled, and they attach to receptor proteins on each side of the synapse.

6. **What structures compose the central nervous system?** the spinal cord and the brain

7. **What are the two main functions of the spinal cord?** They provide a means of communication between the brain and the peripheral nerves.

The four main parts of the brain include the cerebrum, the diencephalon, the cerebellum and the brain stem
 * 8. What are the four major parts of the brain and the general function of each?**