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LU10: NERVOUS SYSTEM FIKRI (50609) RYNIER (53699) (Receptor Mechanism…
LU10: NERVOUS SYSTEM
FIKRI (50609)
RYNIER (53699)
Structure
Function
Sensory input (afferent)
integration (interneurons)
Motor output (efferent)
Components
Central Nervous System (Brain & Spinal Cord)
Peripheral Nervous System) (nerves)
Motor neurons
Somatic (manual): voluntary
Autonomic (auto): involuntary
Parasympathetic (relax)
Sympathetic (active)
neurons part
Dendrtites
Cell body
Axon
Receptor Mechanism
Mechanoreceptor
pressure, touch, strecth, sound
Pain receptor (Nociceptor)
heat, pressure, chemicals
Thermoreceptor
Cold (< 30°C)
Hot (>22°C)
Chemoreceptor
General (solute concentration)
specific (taste & smell)
Electroreceptor (electric current changes)
Photoreceptor (detect visible light)
Action potential (rapid changes in polarity)
Membrane potential
electric potential difference between inside/outside of cell
Resting potential
neuron not conducting an impulse
Depolarization
Oosodium Gates Open
Negative pulse change to positive (iside axon)
Repolarization
Potassium Gates open
inside axon become negatice as K+ exits
Neurotransmitter & synaptic transmission
Acetylcholine (ACh)
excites skeletal muscle but inhibits cardiac muscle in PNS
give effect on excitatory or inhibitory effect on smooth muscle /glands
Noreinephrine (NE)
important for dreaming, waking, mood (CNS)
Serotonin
thermoregulation, sleeping, emotions, perception
