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Glossary of Physiology Terms
beginning with letter R
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rapid eye movement Tweet Definition of rapid eye movement Like Definition of rapid eye movement on Facebook
noun (uncountable)
  1. Rapid movement of the eyes, characterising REM sleep.
reaction Tweet Definition of reaction Like Definition of reaction on Facebook
  1. An action or statement in response to a stimulus or other event
The announcement of the verdict brought a violent .
You were in the coutroom. What is your ?
When I last tried to eat strawberries I had a terrible allergic .
  1. (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition
    In this , the acid and base will neutralize each other, producing a salt.
red blood cell Tweet Definition of red blood cell Like Definition of red blood cell on Facebook
  1. (cytology) A type of cell in the blood of vertebrates that contains haemoglobin and transports oxygen from the lungs to the tissues; an erythrocyte.
reflex Tweet Definition of reflex Like Definition of reflex on Facebook
  1. An automatic response to a simple stimulus which does not require mental processing.
  2. (linguistics) A corresponding phoneme in a daughter language.
verb to reflex
  1. to bend, turn back or reflect
  2. to respond to a stimulus
  1. bent, turned back or reflected
  2. produced automatically by a stimulus
reflex arc Tweet Definition of reflex arc Like Definition of reflex arc on Facebook
  1. (anatomy) , (psychology) The pathway mediation, mediating a reflex.
REM Tweet Definition of REM Like Definition of REM on Facebook
noun rem or
  1. (computing) A programming language statement used for documentation (in BASIC for example); also used in DOS batch files.
initialism or R.E.M. or rem
  1. rapid eye movement
REM sleep Tweet Definition of REM sleep Like Definition of REM sleep on Facebook
noun or R.E.M. sleep (uncountable)
  1. The part of sleep during which a person dreams, characterised by rapid eye movement (REM).
respiration Tweet Definition of respiration Like Definition of respiration on Facebook
noun (wikipedia, respiration (physiology))
  1. the process of inhaling and exhaling; breathing, breath
  2. any similar process, in organisms that lack lungs, that exchanges gases with its environment
  3. the process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide
respiratory Tweet Definition of respiratory Like Definition of respiratory on Facebook
  1. Relating to respiration; breathing.
respire Tweet Definition of respire Like Definition of respire on Facebook
verb (respir, ing)
  1. (intransitive) To breathe in and breath out, out
  2. (intransitive) To engage in the process of respiration
  3. (intransitive) To recover one's breath or breathe easily following stress
  4. (transitive) To inhale and exhale); to breathe
respond Tweet Definition of respond Like Definition of respond on Facebook
  1. A response.
  2. A versicle or short anthem chanted at intervals during the reading of a lection.
  3. (architecture) A half-pillar, pilaster, or any corresponding device engaged in a wall to receive the impost of an arch.
  1. (intransitive) To say something in return; to answer; to reply.
  2. (intransitive) To act in return; to exhibit some action or effect in return to a force or stimulus; to do something in response; to accord.
  3. (intransitive) To correspond; to suit.
  4. (transitive) To satisfy; to answer.
The prisoner was held to the judgment of the court.
responsive Tweet Definition of responsive Like Definition of responsive on Facebook
  1. answering, Answering, replying or responding.
  2. Able to receive and respond to external stimuli.
  3. Using antiphons; antiphonal.
  4. susceptible, Susceptible to the feelings of others.
retch Tweet Definition of retch Like Definition of retch on Facebook
verb (retches, retching, retched)
  1. To make an effort to vomit; to strain, as in vomiting.
rete Tweet Definition of rete Like Definition of rete on Facebook
noun (plural retia)
  1. (anatomy) a network of blood vessels or nerves
  2. an anatomical part resembling or including a network
rictus Tweet Definition of rictus Like Definition of rictus on Facebook
noun (rictus, es)
  1. A bird's gaping mouth
  2. Any open-mouthed expression
his face was a of sheer delight
rigor Tweet Definition of rigor Like Definition of rigor on Facebook
  1. US spelling of rigour.
rigor mortis Tweet Definition of rigor mortis Like Definition of rigor mortis on Facebook
  1. Temporary stiffness of a body's muscles and joints following death.
rise Tweet Definition of rise Like Definition of rise on Facebook
  1. The action of moving upwards
    1. An increase (in a quantity, price, etc)
  2. (UK, Ireland) A pay rise (rfv-sense)
verb (rises, rising, rose, risen)
  1. (intransitive) To move upwards.
We watched the balloon .
  1. (intransitive, of a celestial body) To appear to move upwards from behind the horizon of a planet as a result of the planet's rotation
The sun was rising in the East.
  1. (intransitive) To be resurrected
He rose from the grave.
He is risen!
  1. (intransitive) of a quantity, price, etc, To increase.

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