Across
- 1. A neurotransmitter effect that makes it less likely that a receiving neuron will generate an action potential or fire
- 6. the part of the autonomic nervous system that arouses the body to deal with perceived threats
- 8. A nerve cell, the basic building block of the nervous system
- 9. (CNS)includes the brain and the spinal cord, both of which are so important that they are encased in bone for protection
- 10. The Building Blocks of the Nervous System,
- 11. Nerve cells in the brain and spinal cord responsible for processing information
- 12. a neural impulse, a brief electrical charge that travels down the axon of a neuron
- 14. The cell body that maintains the health of the neuron
- 16. is one of the body’s two communication systems, a set of glands that produce hormones, chemical messengers that circulate in the blood.
- 18. A chemical messenger that travels across the synapse from one neuron to the next and influences whether a neuron will generate an action potential
- 20. A neurotransmitter effect that makes it more likely that the receiving neuron will generate an action potential or fire
- 23. the part of the autonomic nervous system that calms the body
- 24. The endocrine system’s master gland, in conjunction with an adjacent brain area, controls the other endocrine glands.
- 25. The tiny, fluid-filled gap between the axon terminal of one neuron and the dendrites of another,
- 26. Specialized cells in every sensory system of the body that can turn other kinds of energy into action potentials (neural impulses) that the brain can process
Down
- 2. (PNS) contains all sensory nerves and motor nerves that connect the brain and the spinal cord to the rest of the body
- 3. The state of a neuron when it is at rest and capable of generating an action potential
- 4. The extension of a neuron through which neural impulses are sent
- 5. The branching extensions of a neuron that receive information and conduct impulses toward the cell body (soma)
- 7. the division of the peripheral nervous system that controls the glands and muscles in the sense that you don’t need conscious thought to activate it
- 13. the division of the peripheral nervous system that controls the body’s skeletal muscles
- 15. The principle stating that if a neuron fires, then it always fires at the same intensity; all action potentials have the same strength
- 17. an action potential followed by a brief phase
- 19. Nerves that carry information from the sense receptors to their spinal cord and brain
- 21. The endpoint of a neuron, where neurotransmitters are stored
- 22. a chemical messenger produced by the endocrine glands and circulated in the blood