mediate pain at receptor sites. In an injury, receptors in the skin make electrical signals that go up the spinal cord to the brain. The brain then evaluates the pain by releasing pain killers called endorphins which bind at opiate receptor sites of neurons to mediate pain. Endorphins effect the dopamine pathway that feeds into the frontal lobe. These pathways inhibit the flow of dopamine. Vast quantities of endorphins are released and nerves are shut off so more dopamine flows through pathway to get to frontal lobe therefore replacing pain with pleasure.

are natural brain chemicals with morphine-like qualities. They are believed to control mood, emotion and motivation, as well as pain perception and other functions.

Chemicals produced by the body when under stress or pain. These chemicals produce a state pleasure and ecstasy

Opiates produced within the body; they may have an important role in the processes by which the body builds up tolerance to drugs and is distressed by their withdrawal.

are opioid peptides produced in the animal and act on the same receptors as opiate drugs. Homeostasis he co-ordinated control of physiological regulatory processes that restore and maintain normal body equilibria.

A group of proteins produced naturally by the body with potent analgesic properties (similar to morphine). These are the brain chemicals that contribute to the "runner's high" or good feelings during and after exercise

Naturally occurring, opiate-like substances in the mammalian brain.

Hormones that make us feel good and happy. The production of these hormones is stimulated by exercise.

This is one of a group of chemical compounds that occur naturally in the brain and have pain-relieving properties similar to opiates (e.g. morphine). They are also responsible for sensations of pleasure.

Opium-like substances produced naturally in the brain, which give a feeling of well-being. Production of endorphins is stimulated by many natural circumstances, and also by profound exercise (to which people can become "addicted"!). Depressed in premenstrual tension.

A brain chemical that eases or suppresses pain.

Naturally occurring hormones in the brain that have pain-relieving effects and can cause a sense of well-being.

Opiate-like hormones that are manufactured in the body and contribute to natural feelings of well-being.

Chemical substances produced in the brain that reduce the feeling of pain by blocking the receptor sites involved in pain perception.

Natural chemical released by the body during vigorous exercise.

These are chemicals the brain generates that regulate pain. (the right sort of endorphins serve as natural pain killers.)"Endorphins actually determine what 'reality' is for each of us - endorphins, our natural opiates, are a filtering mechanism in the brain. The opiate system selectively filters incoming information from every sense - sight , hearing , smell, taste and touch and blocks some of it from percolating to higher levels of consciousness." http://www.core77.com/mackay/7.html

A class of chemicals produced inside the body that mimic the effects of opiate drugs” ( Levinthal, 106).

A group of molecules found in the brain known for their natural pain relieving properties.

Endorphins are a group of small proteins naturally occurring in the brain around nerve endings, that bind to opiate receptors and thus can raise the pain threshold. Enkephalins are included in this group of compounds.

Molecules that have pain-reducing properties and are found in many parts of the body; in the nervous system, they bind to the same receptors that bind exogenous opiates.

Morphine-like chemicals produced in our own bodies during times of pain or stress

A protein released from the brain, is said to bring a sense of well-being and act as a 'natural pain killer'. Stimulated by physical activity endorphins are what contribute to the 'runners high'- a term used to describe the feeling of euphoria that can be felt through participation in physical activity. For more information click here.

naturally occuring chemcials in the body that appear to reduce pain. Sometimes referred to as bodys own painkillers

Natural pain-reducing substances released by the pituitary gland, producing an effect similar to that of narcotic pain relievers.

a group of hormones that occur naturally in the brain and have strong analgesic (pain-relieving) properties.

(en-DOR-fins) - chemicals made by the brain that give you a sense of well-being.

Naturally occurring molecules made up of amino acids, the building blocks of proteins. Endorphins attach to special receptors in the brain and spinal cord to stop pain messages. These are the same receptors that respond to morphine and other opioid analgesics.

Pain-killing proteins produced naturally by the body.

natural opiates of the brain. These compounds regulate pain reception

The body's natural painkillers. Small proteins that work to better your mood, combat stress, speed up healing and stimulate the immune system.

Naturally produced chemicals in the brain that create feelings of happiness, euphoria, serenity, and fearlessness.

Opium Vascular

Any group of hormone-like substances with painkilling and tranquillising properties that are secreted by the brain.

Substances produced naturally in the body to relieve pain.

Hormone-like substances produced in the brain that have analgesic properties.

A group of endogenous, morphine-like hormones secreted by the brain when the body is under unusual stress, which fit into the brain's opioid receptors and stimulate them to fire, producing tranquilizing and pain-killing properties that appear to help induce a sort of euphoria; some people report feeling a state of well-being similar to endorphin euphoria after experiencing intense sensations such as those associated with prolonged flogging.

endogenous biomechanical substances implicated in the alleviation of pain, produced as a result of body stress.

are natural pain killing substances found in the human brain that may be changed by taking a number of drugs including alcohol, anabolic steroids and heroin and other opiates.

Peptides produced by the pituitary gland and the hypothalamus that resemble opiates in their ability to produce analgesia and a sense of well-being that can act as natural pain killers.

A natural chemical released by the body during exercise; Endorphins help relieve pain and leave the participant with a "natural high".

small molecules secreted by the brain that act as a natural analgesics. e.g. as morphine does in controlling pain. A product of the pituitary gland. They are thought to be concerned with controlling the activity of the endocrine glands. Thiamine is known to be used by endorphins. The increase of endorphins through exercise can help reduce the pain of Endometriosis

natural opiates produced in the brain which function as the body's own natural painkillers. Endorphins released during excercise calm you down, help prevent disease, and reduce stress.

Neurotransmitters produced in the brain that generate cellular and behavioral effects like those of morphine.

Brain chemicals that ease or suppress pain.

These morphine like substances are produced on exercise and have a direct action on the brain giving a sense of euphoria.

Naturally occurring chemical messengers (peptides) in the body which have morphine-like properties that suppress pain.

Chemicals in the brain which create a feeling of euphoria; said to be the cause of the "runner's high"

natural opiates released by the brain during prolonged exercise and thought to be responsible for a self induced feelings of well being EPIDERMIS: the protective top layer of the skin where pigment cells, which give color to the skin, are found.

opium-like chemicals made in the brain. They may contribute to a person's sense of well-being.

Children with autism, Trevarthen et al A range of naturally produced opium-like substances found in the brain which act as neurotransmitters and affect natural pain control.

friendly little parasites that you usually feel in the middle of a good run. 34"'The endorphins are kicking in.

natural, endogenous analgesics (pain killers).

body's own chemicals that produce feelings of well-being.

Endogenous biogeochemical substances which alleviate pain. These are produced by the body in response to stress. They are similar to narcotics and function in the same way.

Peptides with opiate-like effects that are made by neurons and used as neurotransmitters; one of the endogenous opioids that binds to opiate receptors.

A group of proteins released by the brain, often in response to stress or exercise, that reduce the perception of pain.

These are chemicals the brain generates that regulate pain. Certain types of endorphins serve as natural pain killers.

Chemical substances, polypeptides, produced in the brain, that act as opiates and produce analgesia by binding to opiate receptor sites involved in pain perception.

Peptides with opiate-like effects that bind to opiate receptors. Endorphins are made by neurons and used as neurotransmitters.

Compounds occurring naturally in the brain acting upon the central and peripheral nervous system to reduce pain. Endorphin release is stimulated by aerobic exercise.

Any of a group of proteins with potent analgesic properties that occur naturally in the brain. These are the brain chemicals that contribute to the "runner's high" or good feelings during and after exercise.

Endorphins are endogenous opioid biochemical compounds. They are peptides produced by the pituitary gland and the hypothalamus in vertebrates, and they resemble the opiates in their abilities to produce analgesia and a sense of well-being. In other words, they work as "natural pain killers".

naturally occurring painkilling chemicals. Some scientists theorize that people who suffer from severe headache have lower levels of endorphins than people who are generally pain free.

natural, morphine like tranquillizers released in the brain during aerobic exercise. Endorphins block stress and pain sensations and may produce a positive mood.

Natural substances, chemically similar to morphine, that the brain releases to relieve pain.

A class of protein hormones produced in the brain that have pain-relieving properties.

Natural polypeptide opiate-like substances in the brain. One function of endorphins is the suppression of pain.

Natural narcotics manufactured in the brain to reduce sensitivity to pain and stress. May contribute to stress-related fertility problems.

Chemicals produced by our own body that act like morphine to reduce pain.

A family of neuro-transmitters. There are several different kinds (sometimes called an opioid) that helps to ease pain and cause sleepiness.

chemicals in the brain that are responsible for positive moods.

The brain's natural chemicals that are thought to elevate mood and/or kill pain.

An indwelling pleasure drug triggered by activities that satisfy our individual needs; e.g., when a jogger jogs, a rock climber climbs or a serial killer finds a fresh neck in a dark alley.