Nervous System

2. System that controls “fight or flight” responses
3. Conversion of stimulus energy to a neuronal signal
6. Part of the nervous system that includes the brain and spinal cord
9. Transmitter that activates 2nd messenger system
11. Large nucleus lying in center of brain, highly connected to cerebral cortex
13. What action potentials do when locally generated depolarizing currents spread to adjacent regions of the membrane
15. Nervous system that includes fibers of the motor neurons that supply skeletal muscles
18. Nervous system that includes fibers that innervate smooth muscle, cardiac muscle, and glands
19. Motor neurons that carry signals away from central nervous system to initiate action
20. Part of the nervous system that includes nerve fibers
22. Multilayered sheath of plasma membrane that wraps around axonal fibers as an insulator
23. Synaptic input of many neurons to one
24. System that plays a key role in learning, memory, and emotions

1. Part of the brain that maintains homeostasis
4. What carries signal across synapses; binds postsynaptic receptors
5. Outer, highly folded surface of the cerebrum
7. Specific receptors for different modalities/ sensations
8. Spaces between neurons where information is passed
9. Charged cells that conduct electrical signals to pass information throughout the body
10. What transduces and groups stimuli to form a sensory surface
12. Synaptic output of one neuron to many
14. Sensory neurons that sense stimulus
16. Neurotransmitter used by motoneurons; increases membrane permeability for Na+
17. System that regulates “rest and digest” functions
21. Nerve network of the digestive tract