Pain is an unpleasant sensory and the emotional experience associated with actual or potential tissue damage. ... Pain starts with the stimulation of one or more of the three pain receptors mentioned previously, these receptors may receive information about intense heat, extreme pressure, sharp pricks or cuts, or other events that can cause the body damage. ... Their idea was that when pain signals first reach the nervous system, they excite activity in a group of small neurons that form a kind of pain pool. When the total activity of these neurons reaches a certain minimal level, a hypothet...

• Word Count: 2045
• Approx Pages: 8
• Has Bibliography
• Grade Level: Undergraduate

There are three types of neurons, each having a different function; Sensory, transmit impulses received by the nerve endings to the central nervous system. Motor, carry outgoing signals from the brain or spinal cord to other areas of the body and inter-neurons, receive signals from the sensory and send impulses to the motor. ... They are stimulated by contact of a noxious stimulant, such as a sharp object touching the foot or changes in pressure and temperature triggering detectors located within the skin. ... The electrical impulses will continue its journey from neuron to neuron until the ac...

• Word Count: 1030
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

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

The main effects of this drug include: increased energy, feelings of pleasure and emotional warmth, and distorted sensory and time perception. ... Serotonin controls your mood and Reference 1: Normal Brain Scan v. Brain Effected by MDMA social behavior. ... The changes of these neurotransmitters can attribute to the increased heart rate and blood pressure that can be effects of the use of the drug. ... But even if the Molly is pure, it still poses a risk for elevated heart rates, distortion of thought processes, and a raise in body temperature in it's users. ...

• Word Count: 4409
• Approx Pages: 18
• Has Bibliography