These receptor cells are formed as dendrites at the distal of sensory neurons specifically designed for receiving certain kind of stimuli. The sense organs consists of epithelial cells and tissues connecting to the sensory neurons, which are comprised of receptor cells with functions of special senses e.g. vision, hearing, smell, taste and touch. ... There are many receptors in the skin such as free dendritic endings (responds pain and temperature), merkel discs (responds to light touch receptors), root hair plexuses(light touch), meissner's corpuscles (light touch), ruffini's corpus...

• Word Count: 1789
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

Some elementary reflexes are local to the spinal cord, but voluntary muscle control requires the brain as do sensory perceptions. The cells that mediate all functions are nerve cells or neurons.... Axons carry signals downward from the brain and upward toward the brain. ... Pain is not always a symptom of injury to the spinal cord, but injury to nearby nerves sometimes causes sever pain. ... Destruction of sensory nerve fibers can lead to loss of sensations such as touch, pressure, and temperature; it sometimes also causes pain. ...

• Word Count: 1606
• Approx Pages: 6
• Grade Level: High School