Nervous System I - Basic Structure & Function
Across
- 3. Highly branched projections at the ends of neurons that relay impulses to other neurons
- 5. Chemicals that alter a neuron's response to a neurotransmitter or block the release of a neurotransmitter. Examples: endorphins & enkephalins
- 7. The period of time needed for a neuron to be ready to send another signal
- 11. The nervous system controlling involuntary actions
- 13. When multiple neurons deliver impulses to the same neuron
- 15. The lipid (fat) substance that insulates an axon, enabling it to conduct signals faster
- 17. Neurotransmitter that controls skeletal muscles
- 19. The nodes (gaps) between Schwann cells
- 20. Inability to sleep (pg. 380)
Down
- 1. When one neuron sends impulses to multiple neurons
- 2. Can cause seizures, loss of consciousness (pg. 380)
- 4. Neurons in the brain or spinal cord that communicate with each other
- 6. The cells along the axon covered in myelin sheaths
- 8. Drugs like morphine, heroin, codeine, opium derived from the poppy plant (pg. 382)
- 9. Neurons that conduct impulses from peripheral body parts to the brain or spinal cord
- 10. The space between neurons where neurotransmitters (chemicals) propagate the impulse from one neuron to another
- 12. When neurotransmitters are transported back to the synaptic knob.
- 14. Neurons that conduct impulses from the brain or spinal to peripheral body parts
- 16. The nervous system controlling skeletal muscles
- 18. A nerve cell (incl. cell body, axon, dendrites)