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Chemistry
| Term | Definition |
|---|---|
| Regulation | the way your body controls its internal environment (another word for homeostasis) |
| Irritability | Ability to respond to stimuli |
| Impulse | is the action potential of a axon of a neruon |
| 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. |
| Receptor | a body part that receives a stimulus (eye, skin, eardrum, etc.) - they contain a LOT of nerves close to the surface of your body! |
| Neuron | cell that carries messages through the nervous system (a nerve cell) |
| Effector | body parts that respond to nervous system command. They can be muscles or glands. |
| Cell body | contains the NUCLEUS and other organelles. It is the site for metabolic activities. |
| Dendrites | hair-like structures, which receive impulse(s) first. |
| Cell body | contains 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. |
| Meninges | is the largest. It has a right and left HEMISPHERE and CONVOLUTION (folds). |
| Cerebrum | means “LITTLE BRAIN “. It too has a left and right hemisphere and convolutions. Itmaintains BALANCE (equilibrium) and controls all voluntary and some involuntary movement. |
| Cerebellum | region of the brain that coordinates body movements |
| Medulla oblongata | part of brain connected to spinal cord; monitors basic, involuntary body functions – breathing, circulation, etc. ; processes involuntary reflexes such as coughing, vomiting, blinking |
| Central nervous system (CNS) | Brain and spinal cord |
| Peripheral nervous system (PNS) | All of the parts of the nervous system, except for the brain and spinal cord |
| Meninges | three layers of connective tissue in which the brain and spinal cord are wrapped |
| Neurotransmitter(s) | are brain chemicals that allow transmission of signals from one neuron to another. |