Term
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Definition
| a working unit of the nervous system, made up of a cell body and branches called dendrites and axons |
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Term
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Definition
| a branch of neuron that receives messages and sends them to the cell body |
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Term
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Definition
| a branch of neuron that carries messages, or impulses, away from cell body |
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Term
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Definition
| a small space between neurons, across which an impulse moves by means of a chemical released by the axon |
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Term
central nervous system
7.22 |
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Definition
| a division of the nervous system, containing the brain and spinal cord, which sorts and interprets information from stimuli |
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Term
peripheral nervous system
7.22 |
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Definition
| a division of the nervous system,made up of all the nerves outside the central nervous system |
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Term
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Definition
| the largest part of the brain that is divided into two hemispheres and controls the work of voluntary muscles and interprets impulses from the sense and stores memory |
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Term
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Definition
| a part of the brain that coordinates voluntary muscle movements and maintains balance and muscle tone |
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Term
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Definition
| the part of the brain that controls heartbeat, breathing, and blood pressure by coordinating the involuntary movements of these functions |
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Term
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Definition
| an involuntary and automatic response to a stimulus that allows the body to respond without having to think about what action to take |
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Term
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Definition
| a structure of the inner ear that is shaped like a snail's shell and contains fluids that vibrate, sending impulses to the brain by the auditory nerve |
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Term
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Definition
| a light-sensitive tissue at the back of the eye and contains rods and cones |
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Term
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Definition
| nerve cells in the nasal passages that respond to gas molecules in the air and send impulses to the brain for interpretation of odors |
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Term
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Definition
| the major sensory receptors for taste that are located on the tongue and respond to chemical stimuli |
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Term
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Definition
| endocrine chemicals that are produced from glands directly into the bloodstream and that affect target tissues |
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Term
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Definition
| specific tissue affected by hormones |
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