photoreceptor

Examples of photoreceptor in the following topics:

• Classification of Receptors by Stimulus

  • Sensory receptors are primarily classified as chemoreceptors, thermoreceptors, mechanoreceptors, or photoreceptors.
  • During vision, rod and cone photoreceptors respond to light intensity and color.

• Optic (II) Nerve

  • The optic nerve (cranial nerve II) receives visual information from photoreceptors in the retina and transmits it to the brain.
  • The eye's blind spot is a result of the absence of photoreceptors in the area of the retina where the optic nerve leaves the eye.

• Overview of Sensation

  • Sight or vision (ophthalmoception) is the ability of the eye(s) to focus and detect images of visible light on photoreceptors in the retina that generate electrical nerve impulses for varying colors, hues, and brightness.
  • There are two types of photoreceptors: rods and cones.
  • Our nervous system has sensory systems and organs that mediate each sense and these systems rely on chemoreceptors, photoreceptors, mechanoreceptors, or thermoreceptors to detect the state of the internal or external environment.

• Sensory Modalities

  • The transduction of light into neural activity occurs via the photoreceptors in the retina.
  • When a particle of light hits the photoreceptors of the eye, the photopigment of the photoreceptor undergoes a chemical change leading to a chain of chemical reactions occur.

• Classification of Receptors by Location

  • For example, sensory receptors in the retina are almost entirely photoreceptors.