The Nervous System
WebQuest KEY 45 points
1. (1 point) What is the CNS responsible for?
Issues nerve impulses and analyzes sensory data (includes brain & spinal cord)
2. (1 point) What is the PNS responsible for?
Carrying nerve impulses to and from the body
3. (3 points) What is the autonomic nervous system composed of? Responsible for?
Sympathetic & parasympathic nervous systems; regulating and coordinating the vital structures of the body
4. (3 points) What are the 3 distinct but connected parts of the brain?
Cerebrum, cerebellum, and brain stem
5. (1 point) What is the number of synapses in a single neuron?
1,000 to 10,000
6. (2 points) What are the general functions of the nervous system?
Sensory input, integration, and motor output
7. (1 point) What are the sensory cells of the NS called?
Neurons; sensory receptors
8. (2 points) What are dendrites? How do they function?
Short thick branched extensions that come off of the cell body which function in receiving the impulses from the axons.
9. (2 points) What are axons? How do they function?
Long cylindrical tubes that come off of the cell body which send impulses away from the cell body (to the dendrite).
10. (1 point) What is the soma also known as?
Cell body
11. (1 point) Why can’t a neuron reproduce?
The cell body lacks centrioles
12. (1 point) What is a synaptic cleft?
Space between neurons or between axon terminal and an effector (fluid filed gap)
13. (1 point) What allows the transmission of impulses between synaptic clefts?
Neurotransmitters
14. (1 point) What is the junction between the axon and the dendrite called?
Synapse
15. (1 point) What are groups of unmyelinated nerve cells that are outside of the CNS called?
ganglia
16. (1 point) What are the regular intervals between nerve impulses in myelinated fibers (where nerve impulses jump instead of pass along the nerve fiber) called?
Nodes of Ranvier
17. (1 point) Which is faster: transmission of nerve impulses in myelinated nerves or unmyelinated nerves?
Myelinated
18. (1 point) What do motor neurons do?
Voluntary movement
19. (1 point) What are fasciles?
Nerve bundles
20. (1 point) True or False Brain size affects intelligence.
21. (1 point) What are some of the conditions that may occur when there is a faulty amount of transmissions in the neurons (too few or too many)?
Parkinson’s, depression
22. (2 points) What is the difference between white & gray matter?
White-insulated with myelin (outer portion of brain & spinal cord); gray- not insulated (inner portion of brain and spinal cord)
23. (1 point) What is the function of neuroglial cells?
Support neurons
24. (3 points) Name the neuroglial cells.
Astrocyte, olgiodendrites, & microglial
25. (1 point) How is epilepsy a brainstorm?
Erratic brain patterns emerge, causing seizures (can see on an EEG)
26. (1 point) Where in the brain do cells die in Parkinson’s patients?
Substantia nigra
27. (2 points) What are the possible causes of Parkinson’s disease?
Genetic predisposition, repeated brain injury, or brain infections (reduced dopamine)
28. (1 point) What is the neurotransmitter effected in Parkinson’s patients?
Dopamine
29. (1 point) What are two treatments for Parkinson’s patients?
L-Dopa or deep brain stimulation (with an implant); carbidopa; levodopa
30. (1 point) When does action potential occur?
When a neuron transmits information