Flashcards: Understanding Sensory Receptors and Nerve Transmission — 20 cards

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.