Across
- 6. The junction between two neurons where communication occurs through neurotransmitters.
- 10. The phase of an action potential when the membrane potential becomes more positive.
- 11. A sensory receptor that responds to mechanical pressure, vibration, or stretch.
- 12. The process where action potentials jump between nodes of Ranvier along a myelinated axon.
- 14. Branch-like structures of a neuron that receive incoming signals from other neurons.
- 16. A neuron that carries signals from the central nervous system to muscles or glands, causing a response such as muscle contraction or secretion.
- 18. The part of the autonomic nervous system that promotes “rest-and-digest” activities.
- 19. A rapid electrical signal that travels along an axon when the membrane depolarizes past a threshold.
- 21. The sense of smell detected by receptors in the nasal cavity.
- 22. The division of the nervous system that controls involuntary body functions such as heart rate and digestion.
- 23. A spiral-shaped structure in the inner ear that converts sound vibrations into nerve signals.
- 24. A neuron located within the central nervous system that connects sensory neurons to motor neurons and helps process information.
- 26. The division of the nervous system that controls voluntary skeletal muscle movement.
- 27. A short time after an action potential when a neuron cannot fire another impulse.
Down
- 1. The sense of taste detected by taste buds on the tongue.
- 2. The normal electrical charge difference across a neuron's membrane when it is not transmitting a signal.
- 3. A receptor that detects chemical stimuli such as odors or tastes.
- 4. fatty insulating layer surrounding some axons that increases the speed of nerve impulse conduction.
- 5. specialized cell that transmits electrical and chemical signals in the nervous system.
- 7. The part of the autonomic nervous system responsible for the “fight-or-flight” response.
- 8. A specialized sensory receptor in the eye that detects light.
- 9. A small, localized change in membrane potential that varies in magnitude depending on stimulus strength.
- 13. The long projection of a neuron that carries electrical impulses away from the cell body.
- 15. A chemical messenger released at a synapse that transmits signals to another neuron, muscle, or gland.
- 17. The process by which the membrane potential returns toward resting potential after depolarization.
- 20. Gaps in the myelin sheath along a myelinated axon where ion exchange occurs and action potentials are regenerated.
- 25. The membrane potential level that must be reached for an action potential to occur.