Anatomy Unit 12 Study Guide Answers

Anatomy review for the nervous system - Week 12 Study Guide

1. Distinguish the difference between neuron, neuroglial cells, Schwann cells, neurofibrils, and astrocytes. Neuron: masses of nerve cells in nervous tissue. Neuroglial Cells: provide neurons physiological requirements (fill spaces, give support to neurons). Schwann Cells: larger axons of peripheral neurons enclosed in sheaths. Neurofibrils: thin, long fibrils that run through body of neuron and extends to axon and dendrites; gives neuron shape and support. Astrocytes: cells found between neurons; provide structural support

2. What is the difference between dendrites and axons? Dendrites are short and carries impulses to the cell body, there are many of them. Axon slight elevation of the cell body; carries nerve impulses away from the cell body; only one.

3. What color does myelin (the lipid-protein layers that form a sheath around an axon) appear? White.

4. What are the 2 main parts of the nervous system? Central and Peripheral Nervous System

5. What are 3 functions of the nervous system? Detect changes inside and outside of the body,make decisions based on the info they receive, and stimulate muscle of glands to respond.

6. What is the junction between 2 communicating neurons called? synapse

7. What are the simplest nerve pathways called? Reflex arc.

8. Put the following in the correct sequence to identify the path a reflex arc takes: effector, sensory neuron, motor neuron, receptor, interneuron. Receptor, sensory neuron, interneuron, motor neuron, effector.

9. What are the membranes called that are located between the bone and soft tissue of the nervous system? meninges

10. There are 3 layers of membranes of the nervous system. Name them in order starting with the outer layer. Dura mater, arachnoid mater, and pia mater.

11. Between what 2 layers is the CSF found? Between arachnoid and pia mater.

12. In a spinal tap, between which vertebrae is the needle inserted to measure...