Nervous system — function?
Coordinates actions and rapid communication.
Stimulus — definition?
Environmental excitation triggering response.
Sensory organs — role?
Detect stimuli and convert to nerve impulses.
Nerve message — form?
Electrical activity transmitted to brain.
Sensory receptors — location?
At nerve endings in sensory organs.
Conscious sensitivity — involved?
Perception of sensations via sensory organs.
Touch receptors — types?
Meissner's (light pressure), Pacinian (strong pressure).
Nerve fiber — structure?
Axon, myelin sheath, connective tissue layers.
Message transmission — process?
Stimulus activates receptor, impulse travels to brain.
Electrical activity recording — method?
Electrodes detect nerve fiber electrical signals.
Sensory nerve pathways — conduct?
Signals from receptors to the brain.
Brain — role in signals?
Interprets electrical nerve messages.
Meissner's corpuscles — detects?
Light touch and texture.
Pacinian corpuscles — detects?
Deep pressure and vibration.
Nerve fibers — types?
A fibers (fast, myelinated), C fibers (slow, unmyelinated).
Sensory pathway — organization?
Bundles of fibers separated by connective tissue.
Receptor activation — triggers?
Generation of nerve impulses.
Message propagation — along?
Sensory nerve fibers to CNS.
Sensory receptors — respond to?
Specific stimuli like heat, pressure, light.
Signal interpretation — in?
Brain processes electrical signals into perceptions.
Teste tes connaissances avec un QCM de 10 questions sur Understanding Sensory Receptors and Nerve Transmission.
1. What is the primary role of the nervous system?
2. Which sensory organ is responsible for detecting light stimuli in conscious sensitivity?
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