
1) Opioid peptide
Found on
https://www.crosswordclues.com/clue/endorphins

Endorphins (`endogenous morphine`) are endogenous opioid inhibitory neuropeptides. They are produced by the central nervous system and pituitary gland. The term implies a pharmacological activity (analogous to the activity of the corticosteroid category of biochemicals) as opposed to a specific chemical formulation. It consists of two parts: end.....
Found on
http://en.wikipedia.org/wiki/Endorphins

These morphine like substances are produced on exercise and have a direct action on the brain giving a sense of euphoria.
Found on
http://rsi.org.uk/medical_glossary/medgloss2_E.html

Neurotransmitters produced in the brain that generate cellular and behavioral effects like those of morphine.
Found on
http://www.brainfacts.org/glossary

a neuropeptide which has specific binding sites on nerve cells called opiate receptors. When the receptor is activated by endorphins or morphine it reduces the excitability of the post synaptic cell. Peptide receptors are also found on lymphocytes which suggest an association between neuropeptides and the regulation of the immune response.
Found on
http://www.encyclo.co.uk/local/20169

A range of naturally produced opium-like substances found in the brain which act as neurotransmitters and affect natural pain control.
Found on
http://www.encyclo.co.uk/local/20898

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.
Found on
http://www.encyclo.co.uk/local/20944

One of the three major groups of endogenous opioid peptides. They are large peptides derived from the pro-opiomelanocortin precursor. The known members of this group are alpha-, beta-, and gamma-endorphin. The term endorphin is also sometimes used to refer to all opioid peptides, but the narrower sense is used here; opioid peptides is used for the ...
Found on
http://www.encyclo.co.uk/local/20973

Natural narcotics manufactured in the brain to reduce sensitivity to pain and stress which may contribute to stress-related fertility problems.
Found on
http://www.encyclo.co.uk/local/21429

These morphine like substances are produced on exercise and have a direct action on the brain giving a sense of euphoria.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Chemicals in the brain which create a feeling of euphoria; said to be the cause of the "runner's high"
Found on
http://www.howtobefit.com/glossary-of-running.htm

Type: Term Pronunciation: en-dōr′finz, en′dōr-finz Definitions: 1. Opioid peptides originally isolated from the brain but now found in many parts of the body; in the nervous system, endorphins bind to the same receptors that bind exogenous opiates. A variety of endorphins (α, β, and γ) that vary not only in thei...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=29174

(en-dor;finz) A group of endogenous opiate molecules that may act as a natural analgesic.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml

Chemicals that the brain generates in order to regulate pain. These natural pain-killers are released at times of severe mental stress or strenuous exercise. Hightened endorphin levels can provide a natural sense of pain relief, calmness and euphoria for women during labor and delivery.
Found on
http://www.pregnology.com/

Endorphins are natural painkillers produced by the body. The protein molecules bind to receptors in the brain and spinal cord to stop messages of pain and create an analgesic effect. In the treatment of back pain, electrical stimulation has been shown to promote the release of endorphins. Likewise, aerobic exercise for a prolonged period of time is...
Found on
http://www.spine-health.com/glossary/e/endorphins

Neurochemicals that occur naturally in the brain, which have pain killing properties, and are usually produced when the body experiences physical stress.
Found on
https://www.encyclo.co.uk/local/22233

A group of neurotransmitters involved in pain relief, pleasure, and modulating the action of other neurotransmitters.
Found on
https://www.sparknotes.com/psychology/psych101/glossary/terms/

chemicals in the brain that are responsible for positive moods.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---child-and-

Chemicals produced in the brain that act as the body's natural pain killers.
Found on
https://www.timelessessentialoils.com/pages/timeless-holistic-health-glossa
No exact match found.