Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «R»:
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Respiratory system
Respiratory system: The organs that are involved in breathing.
These include the nose, throat, larynx, trachea, bronchi, and lungs....
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Respiratory therapist
Respiratory therapist: A person who has graduated from an approved respiratory therapist program and is qualified to provide respiratory care under the supervision of a physician. In the US, respiratory therapists may be is registered by the National Board for Respiratory Care....
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Respiratory therapy
Respiratory therapy: Exercises and treatments designed to help patients maintain and recover lung function, such as with cystic fibrosis and after surgery....
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Response, Babinski
Response, Babinski: A neurologic reflex that constitutes an
important medical examination based, believe it or not, upon what
the big toe does when the sole of the foot is stroked. If the big toe
goes up, that may mean trouble.
The Babinski response is obtained by stimulating the external
porti...
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Response, hyperglycemic
Response, hyperglycemic: A response resulting in a high blood sugar and specifically elevating the level of the sugar glucose in the blood.
Hyperglycemia is often found in diabetes mellitus. It occurs when
the body does not have enough insulin or cannot use the insulin it
has to turn glucose into...
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Response, plantar
Response, plantar: The plantar response, also known as the
Babinski response, is an important neurologic examination based upon
what the toes do when the sole (the plantar surface) of the foot is
stroked. If the big toe goes up, that may mean trouble.
The plantar response is obtained by stimulati...
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Rest
Rest: 1. Repose. Relaxation.
2. A fragment of embryonic tissue that has been retained after the period of embryonic development. Also called an embryonic rest....
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Restenosis
Restenosis: Renarrowing, as in restenosis of a coronary artery after angioplasty. From the Greek "stenos" meaning narrow....
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Resting phase
Resting phase: More appropriately called interphase.
The interval in the cell cycle between two cell divisions when the individual chromosomes
cannot be distinguished, interphase was once thought to be the resting phase but it is far
from a time of rest for the cell. It is the time when DNA is repli...
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Restitution
Restitution:
In cytogenetics, the spontaneous rejoining of broken chromosomes to reconstitute the original chromosome configuration....
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Restless leg syndrome
Restless leg syndrome: An uncomfortable creeping, crawling, tingling, pulling, twitching, tearing, aching, throbbing, prickling or grabbing sensation in the calves that occurs while sitting or while lying down. Whatever the nature of the sensation, the result is an uncontrollable urge to relieve it ...
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Restless legs
Restless legs: See: Restless leg syndrome....
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Restriction endonuclease
Restriction endonuclease:
An enzyme from bacteria that can recognize specific base sequences in DNA and cut (restrict) the DNA at that site (the restriction site). Also called a restriction enzyme....
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Restriction enzyme
Restriction enzyme: An enzyme from bacteria that can
recognize specific base sequences in DNA and cut the DNA at that site
(the restriction site). A restriction enzyme acts as a biochemical
scissors. Also called a restriction endonuclease.
A restriction enzyme is a protein produced by bacteria th...
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Restriction fragment length polymorphism
Restriction fragment length polymorphism: A
difference in DNA between people that can be recognized by the use of a restriction enzyme. Referred to as an RFLP....
