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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. |