The Blind Spot
[source: my psych book]
Neurons in the retina exit the eye forming the optic nerve.
optic nerve peace.love.faith
A+ students: the answer is optic nerve.
sensory neurons
The blind spot
Neurons that convert light into electrical impulses are called photoreceptor cells. These specialized cells are found in the retina of the eye and are responsible for detecting light and converting it into signals that the brain can interpret as visual information.
The retina is the layer of nerve tissue in the back of the eye that contains sensory neurons called photoreceptors. These photoreceptors, specifically rods and cones, respond to light and convert it into electrical signals, which are then transmitted to the brain via the optic nerve, allowing us to perceive visual information.
Specialized cells, called retinal ganglions, together with bipolar cells, amacrine cells, and horizontal cells, carry the visual information to the optic nerve (cranial nerve 2). This nerve then carries the information from the retina at the back of the eye to the visual cortex in the occipital lobe (back of the head). Check out this site: http://www.webexhibits.org/colorart/ganglion.html
Neurons with two processes are classified as bipolar neurons. These neurons have one dendrite and one axon extending from their cell body. Bipolar neurons are commonly found in specialized sensory pathways like the visual and olfactory systems.
Motor neurons exit the spinal cord through the ventral roots. Their role in the nervous system is to transmit signals from the brain to muscles and glands, controlling movement and bodily functions.
retina
Yes, th ration of motor neurons to muscle fibers are greatest for the muscles that control eye.