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Nervous Regulation
Term | Definition |
---|---|
Regulation | Controls the amount and the direction of responses. It also promotes proper coordination of responses to maintain homeostasis. |
Irritability | Ability of a cell to respond to it's environment |
Impulse | a sudden strong and unreflective urge or desire to act. |
Stimulus | Something that causes a change in the environment which results in a change in an organism to which a response will occur. |
Response | Action resulting from the stimulus. |
Resptor | (Sense organs) Specialized structures sensitive to certain types of stimuli. |
Neuron | specialized cell transmitting nerve impulses; a nerve cell. |
Effector | Body parts that respond to nervous system command. They be muscles or glands. |
Dendrites | Hair like structures, which receive impulse(s) first. |
cell body | (cyton) contain the nucleus and other organelles. It is the site for metabolic activities. |
Axon | long thin structure that carries impulse away from cell body to an effector (muscle or gland) or other neurons. Myelinated axon allows impulses to travel faster by jumping. |
Meninges | Inflammation of the meninges (membranes) surrounding CNS caused by bacteria. |
cerebrum | The largest part of the brain. It has a right and left Hemisphere and Convolution ( folds). It contains memory, thought, analyzing and the senses. |
cerebellum | It's too has a left and right hemisphere and convolutions. It maintains balance (equilibrium) and controls all voluntary and some involuntary movement. |
medulla oblongata | The lowest part of the brain the controls many involuntary activities. |
central nervous system (CNS) | Brain and spinal cord. Its protected by bones, meninges, and cerebrospinal fluid. |
Peripheral nervous system ( PNS) | All other neurons outside the CNS. It's divided into somatic and autonomic nervous system. |
Neurotransmitter(s) | Brain chemicals that allow transmission of signals from one neuron to another. They are hormones. |