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Bio- Nervous System
| Question | Answer |
|---|---|
| Photoreceptors | Light |
| Thermoreceptors | Heat |
| Mechanoreceptors | Movement |
| Chemoreceptors | Taste/smell |
| Nocireceptors | Pain |
| Sensory neuron | Senses conditions in and out of body, gives info to central system |
| Interneurons | Interconnect other neurons (in central system) |
| Motor neuron | Sends instructions from central system to body; squeezes either a muscle or a gland |
| Axon | long part of neuron |
| Cell body | Large part of neuron |
| Dendrite | structures connected to cell body of a neuron; receives neurotransmitters through exocytosis by the synapses of another neuron |
| Myelin sheath | protects axon |
| Terminals | structures at the end of a neuron opposite of the cell body |
| Synapse | Structure at the end of terminals; uses exocytosis to help the neurotransmitters leave one neuron and activate receptors on the dendrites of the next neuron |
| Rods in retina | Detect light and dark |
| Cones in retina | Detect color |
| Retina | In the back of eye; contains rods and cones |
| Optic nerve | Attached to back of eye; source of blind spot because there are no rods or cones in this area |
| Cerebrum | main part of brain |
| Cerebellum | structure in back of brain; responsible for coordination |
| Brainstem | structure in middle of brain |
| ALS | amyotrophic lateral sclerosis; kills motor neurons and causes muscles to weaken. Causes no mental problems |
| Parkinsons | resting tremor, shuffling gait (shortage of dopamine) |
| Multiple sclerosis | T-Cells identify myelin as an antigen and attack it; causes neurological disorders |
| Cochlea | Structure in ear; contains fluid and cilia; responsible for balance because it detects up and down |