| Term | Definition |
|---|
| Genes | heredity passed through chromosomes, made of DNA, physical traits passed along these genes |
| Parts of a nerve cell | cell body, dendrites, axon |
| Cell Body | contains nucleus, generates energy |
| Dendrites | recieves, collects, and sends info to nucleus |
| Axon | sends out signals/info to other cells, insulated by myelin sheath |
| Nodes of Ranvier | part of axon, allows message to jump from gap to gap |
| How many neurons do we have? | about 100 million |
| Synapse | the space between neurons |
| Neurotransmitters | how nerve cells communicate |
| glial cells | nerve cells are held together by these |
| CNS | brain and spinal cord... without the CNS nothing works |
| PNS | carries signals to the body... includes all nerves and structures outside of the CNS |
| Somatic nervous system | part of PNS, runs the senses |
| Autonomic nervous system | part of PNS, runs internal automatic functions |
| Sympathetic | part of Autonomic system, activates bodily systems to deal with stress/stimuli |
| Parasympathetic | part of Autonomic system, slows down response functions, resets body back to normal |
| EEG | measures brain waves (active neurons) |
| CT/CAT Scan | brain x-ray |
| MRI | brain tissue |
| PET Scan | shows brain physical function... blood flow, tissue response. |
Combine with other sets
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