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SC Bio
SC Bio Nervous System
| Question | Answer |
|---|---|
| Controls and coordinates functions throughout the body | nervous system |
| Responds to internal and external stimuli | nervous system |
| Cells in the nervous system that transmit impulses | neurons |
| Largest part of a neuron | cell body |
| Short extensions that receive signals | dendrites |
| Long fiber that carries impulses away from cell body | axon |
| Insulation around the axon | myelin sheath |
| The electrical charge across the cell membrane of a neuron in its resting state | resting potential |
| The reversal of charges in the cell membrane of a neuron from negative to positive | action potential |
| Minimum level of a stimulus that is required to activate a neuron | threshold |
| The space between two neurons | synapse |
| Chemicals released by a neuron to send the impulse across the space to another neuron | neurotransmitters |
| Made up of the brain and spinal cord | central nervous system |
| Largest region of the brain | cerebrum |
| Second largest region of the brain; located at the back of the skull | cerebellum |
| Connects the brain and the spinal cord | brain stem |
| Receives messages and relays information | thalamus |
| Control center for hunger and thirst | hypothalamus |
| Main link between the brain and rest of the body | spinal cord |