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16 Cards in this Set
- Front
- Back
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What two parts make up the Central Nervous System |
Brain and Spinal Cord |
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How much does the adult brain way? |
Aprox. 3 pounds |
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How many nerve cells are there in the brain? |
100 billion |
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What are the other cells in the brain |
Glial Cells |
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What type of glial cell is most important |
Schwan cells |
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What do Schwan cells do? |
They provide insulation on axon |
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What is a neuron? |
A nerve cell that transmits nerve impulses |
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How many neurons are there in the human brain |
86 billion |
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what are the three types of nuerons |
sensory, motor, interneurons |
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How many molecules in a neurotransmitter |
About 60 |
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What does "use it or loose it" mean |
if neurons don't connect they are pruned and go away |
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What is gray matter |
all neurons and support cells that are unconnected |
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what is a reason for increased growth in gray matter during early puberty |
more connections made and dendrites pruned |
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What machine is used to look at growth and pruning? |
MRI |
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Gray matter wanes in which direction? |
Back to front |
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What are three functions of the Prefrontal Cortex |
planning, judgement, and decision making |
