Sensory adaptations and response to stimuli
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Sensory Adaptations and Response to stimuli. Varieties of Stimuli and their Receptors. Sense Organs. Sense organs carry messages about the environment to the central nervous system. Sense Organs. The eyes, ears, nose, tongue, and skin are examples of sense organs.

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Sensory adaptations and response to stimuli

Sensory Adaptations and Response to stimuli



Sense Organs

Sense organs carry messages about the environment to the central nervous system.


Sense Organs

The eyes, ears, nose, tongue, and skin are examples of sense organs.

The sense organs gather information (light, sound, heat, and pressure) from the environment.


Environment

The environment is everything outside the body.

The sense organs gather information from outside the body, then send the messages to the brain.


Vision is your ability to see.

Vision

Vision involves the eye and the brain.


Photoreception
Photoreception

Photoreceptors detect “photo” stimuli and are located on the retina. Two light sensitive cells:

  • Rods

    • light intensity and motion sensitive

  • Cones

    • color sensitive

    • Many are present on the fovea centralis

      The blind spot for the eye is cause by the optic nerve.


Myopia near sightedness
Myopia (Near-Sightedness)

People with near-sightedness cannot see clearly at distance. Correction via concave lenses.


Hyperopia farsightedness
Hyperopia (Farsightedness)

People with far-sightedness cannot see clearly up close. Correction with convex lenses.



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