click below
click below
Normal Size Small Size show me how
Nervous System
Fund of Body Strucutures
| Term | Definition |
|---|---|
| Axon | Portion of each neuron that conducts(carries) electrochemical impulses (signals) from one neuron to another. |
| Myelin sheath | Protective lipoprotein that surrounds each axon. |
| Multiple Sclerosis(MS) | Nerve disease causing degradation of myelin sheaths. |
| CNS | Central Nervous System |
| PNS | Peripheral Nervous System |
| Central Nervous System | Brain and spinal cord. |
| Peripheral Nervous System | All the nerves except brain and spinal cord. |
| Sensory nerve cells | Afferent neurons |
| Motor nerve cells | Efferent neurons |
| Afferent Neurons | PNS contains neurons that transmit stimuli to the brain for interpretation called |
| Efferent Neurons | PNS contains neurons that transmit impulses from the brain to the muscles of movement called |
| Dopamine | Chemical neurotransmitter that influences smooth muscle movements. |
| Parkinson's disease(PD) | Degenerative nerve disease caused by DEFICIENT DOPAMINE. |
| Autonomic nervous system (ANS) | Involuntary System. (breathing, coughing, sneezing, blinking, peristalsis, vomiting, L+D etc.) |
| Sympathetic division | Fight or flight. |
| Parasympathetic division | Rest and digest. |
| Norepinephrine (NE) | Chemical neurotransmitter used by ANS. |
| Sympathetic division (fight or flight) | (bronchodilation, tachycardia, tachypnea, pupillary dilation, paleness, etc.) |
| Parasympathetic division (rest and digest) | (Digestion, reproduction, eupnea, normal HR, etc.) |
| Acetylcholine | Chemical transmitter used by ANS parasympathetic division. |