What are the different phases of xenobiotic metabolism?
The metabolism of xenobiotics is often divided into three phases:- modification, conjugation, and excretion. These reactions act in concert to detoxify xenobiotics and remove them from cells.
What is meant by xenobiotic metabolism?
Xenobiotic metabolism can be defined as chemical transformation by a biological system usually via DMEs, which typically converts relatively lipophilic compounds into more readily excreted hydrophilic metabolites.
What organelle detoxifies xenobiotics?
So, the correct answer is ‘peroxisomes’
How are xenobiotics degraded?
Xenobiotic degradation during biological wastewater treatment can be established or enhanced by bioaugmentation – the addition of either (1) bacterial strains carrying chromosomally encoded genes required for the biodegradative pathway or (2) catabolic genes located on mobile genetic elements such as plasmids or …
What are the 2 phases of metabolism?
Metabolism is often divided into two phases of biochemical reaction – phase 1 and phase 2. Some drugs may undergo just phase 1 or just phase 2 metabolism, but more often, the drug will undergo phase 1 and then phase 2 sequentially.
Where does Phase 1 xenobiotic metabolism occur?
Although Phase I drug metabolism occurs in most tissues, the primary and first pass site of metabolism occurs during hepatic circulation. Additional metabolism occurs in gastrointestinal epithelial, renal, skin, and lung tissues.
What organelle detoxifies?
Smooth endoplasmic reticulum(ER)
Which of the following organelles is responsible for detoxification? Explanation: Smooth endoplasmic reticulum(ER) is responsible for the detoxification of a number of organic chemicals. The smooth ER converts organic substances into water and other soluble products to allow for excretion.
Which cellular structure is responsible for detoxification?
The smooth endoplasmic reticulum
The smooth endoplasmic reticulum is also responsible for detoxifying the cell. It is more tubular than the rough endoplasmic reticulum, and is not necessarily continuous with the nuclear envelope.
What is xenobiotic biodegradation?
Biodegradation of Xenobiotics. Biodegradation or biological degradation is the phenomenon of biological transformation of organic compounds by living organisms, particularly the microorganisms. Biodegradation basically involves the conversion of complex organic molecules to simpler (and mostly non-toxic) ones.
Are xenobiotics degradable?
Biodegradation of naturally occurring organic compounds follows their synthesis. In contrast, man-made compounds, also known as xenobiotics, are often refractory to degradation. The main reason is that they cannot be recognized by naturally present organisms and therefore do not enter common metabolic pathways.
What is xenobiotic pharmacokinetics?
Pharmacokinetics is the study of the absorption, distribution, metabolism, and excretion of xenobiotics. Xenobiotics are substances that are foreign to the body and include natural or synthetic chemicals, drugs, pesticides, environmental agents, and industrial agents.
Where does phase 1 xenobiotic metabolism occur?
Where does phase 1 and 2 metabolism occur?
The liver is the primary site for metabolism. Liver contains the necessary enzymes for metabolism of drugs and other xenobiotics. These enzymes induce two metabolism pathways: Phase I (functionalization reactions) and Phase II (biosynthetic reactions) metabolism.