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Which organ in the human body is responsible for the detoxification of blood?
Kidney
Liver
Lungs
Heart
Liver
The liver is the primary organ responsible for the detoxification of blood. It processes substances like drugs, alcohol, and metabolic waste products, converting them into less harmful or water-soluble compounds that can be excreted from the body.
The liver is the primary organ responsible for the detoxification of blood. It processes substances like drugs, alcohol, and metabolic waste products, converting them into less harmful or water-soluble compounds that can be excreted from the body.
Think of the liver as a chemical filtration plant or a sewage treatment facility that cleans incoming 'dirty' blood before it is recirculated to the rest of the body.
L-D-B: Liver Detoxifies Blood.
RтИТH+O2тАЛ+NADPH+H+тЖТRтИТOH+H2тАЛO+NADP+ тАФ General representation of Phase I oxidative biotransformation catalyzed by Cytochrome P450
The liver utilizes enzymatic pathways, primarily the Cytochrome P450 enzyme system, to perform chemical biotransformation. This involves Phase I reactions (oxidation, reduction, or hydrolysis) to add reactive groups to toxins and Phase II reactions (conjugation) to attach molecules like glucuronic acid, increasing water solubility for easier renal or biliary excretion.
The liver acts as the body's primary biochemical laboratory.
It converts lipid-soluble toxins into water-soluble metabolites for excretion.
It also maintains blood glucose levels and synthesizes essential plasma proteins.
Prevents systemic poisoning from ingested or metabolically produced toxins.
Can be damaged by excessive alcohol consumption or chronic drug use leading to cirrhosis.
Pharmacology (drug metabolism studies).
Clinical diagnostics (liver function tests).
The liver receives blood from both the hepatic artery (oxygenated) and the hepatic portal vein (nutrient-rich but potentially toxic blood from the GI tract).
Option A (Kidney): Primarily filters blood to remove urea and excess water/electrolytes (excretion), not primary detoxification.
Option C (Lungs): Primarily involved in gas exchange (O2тАЛ and CO2тАЛ).
Option D (Heart): A muscular pump responsible for blood circulation.
B is correct тАФ The liver acts as the central hub for metabolic detoxification and chemical processing of blood.
In exams, distinguish between 'excretion' (Kidney) and 'detoxification' (Liver); kidneys filter liquid waste, while the liver breaks down chemical compounds.
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