Table of Contents
What is the stimulus of vision?
Light, in the form of electromagnetic energy, is the stimulus for vision.
What stimulus is a receptor in the eye sensitive to?
Receptors
| Sense organ | Stimulus |
|---|---|
| Skin | Touch, temperature |
| Tongue | Chemicals (in food and drink, for example) |
| Nose | Chemicals (in the air, for example) |
| Eye | Light |
What do receptors in the eyes detect?
The eye is a sense organ containing receptors sensitive to light intensity and colour.
What stimulus triggers sight?
The sensory modality for vision is light. To perceive a light stimulus, the eye must first refract the light so that it directly hits the retina. The transduction of light into neural activity occurs via the photoreceptors in the retina.
How is a stimulus detected?
Receptors. Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus.
Where in the eye are the cells that detect the change in the stimulus to cause this response?
Vision. Vision provides opportunity for the brain to perceive and respond to changes occurring around the body. Information, or stimuli, in the form of light enters the retina, where it excites a special type of neuron called a photoreceptor cell.
What are the four types of receptors what kind of stimulus does each one respond to?
Broadly, sensory receptors respond to one of four primary stimuli:
- Chemicals (chemoreceptors)
- Temperature (thermoreceptors)
- Pressure (mechanoreceptors)
- Light (photoreceptors)
How are receptors specialised to detect different stimuli?
Some receptors can detect several different stimuli but they are usually specialised to detect one type of stimulus: A sense organ is a group of receptors gathered together with some other structures.The other structures help the receptors to work more efficiently. An example of this is the eye.
Where does the stimulus of the eye go?
Light enters the ey by passing through the many layers of the eye, including the lens and the pupil, before hitting the light sensitive neres in the back of the eye. These nerves process the stimulus from the light, and send it to the brain via electric impulses.
What is the function of receptors in the brain?
Receptors are specialised cells that detect a stimulus. Their job is to convert the stimulus into electrical signals in nerve cells. Some receptors can detect several different stimuli but they are usually specialised to detect one type of stimulus: light – photoreceptors in the eye. sound – vibration receptors in the ears.
What are the different types of sensory stimuli?
Each of the principal types of sensation that we can experience—pain, touch, sight, sound, and so forth—is called a modality of sensation. Input to the nervous system is provided by sensory receptors that detect such sensory stimuli as touch, sound, light, pain, cold, and warmth.