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LU10: NERVOUS SYSTEM (Types of Sensory Receptor (4. Chemoreceptor (General…
LU10: NERVOUS SYSTEM
Nervous System: Consisted of neural network that coordinate voluntary and involuntary actions between different body parts.
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Nervous Organization
Invertebrates
Brain (center for integration): formed from concentration of neurons in the head region = cephalization
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Control System
PNS: Sensory information is conveyed through the sensory (afferent) neurons & motor command is conveyed through the motor (efferent) neurons.
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Receptor Mechanism
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The actual detection of stimulus involves conversion of stimulus energy into membrane potential of sensory receptor cell (sensory transduction)
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Neurotransmitter
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PNS: ACh excites skeletal muscle but inhibits cardiac muscle & ACh has either an excitatory / inhibitory effect on smooth muscle / glands
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CNS: NE is important to dreaming, waking, & mood
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