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First pass metabolism is when some substance (usually a drug) is altered before it can reach its site of action.
Often, drugs that are taken orally are brought by the digestive system into the hepatic portal vein into the liver, which does lots of metabolism. If the same drug could have been administered intravenously (that is, through an injection or line), it would not undergo first pass metabolism because it has bypassed the liver to get into circulation. Eventually, the drug will probably be completely metabolized either way, it's just that the oral route reaches circulation more metabolized than something injected.
What else can I help you with?
What is the sum of all the chemical processes that take place in an organism?
is called metabolism .
What are the chemical reactions in your body called?
Metabolism and/or catabolism.
Which process occurs when an organisms body use the nutrients it takes in?
metabolism
What is protein metabolism called?
protein metabolism is the metabolism of proteins
What is the Scientific name for metabolism?
...metabolism.
The sum of all chemical processes in the body is called?
metabolism. It includes anabolism (building up molecules) and catabolism (breaking down molecules) to maintain energy, repair tissues, and eliminate waste products.
Is biotin good for metabolism?
It boosts your metabolism.
How is the metabolism related to growth?
how is the metabolism related to the growth
What is the description of metabolism?
metabolism is basically the digestive process
What is metabolism in its entirety?
Metabolism is a property of organismal life
How metabolism related to growth?
how is the metabolism related to the growth
How growth is related to metabolism?
how is the metabolism related to the growth
