O Level Biology 16 Views 1 Answers
Describe the role of the liver in the assimilation of amino acids by converting them to proteins
Describe the role of the liver in the assimilation of amino acids by converting them to proteins
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The liver plays a crucial role in the assimilation of amino acids by converting them into proteins, which are essential for various bodily functions. Here’s an outline of this process:
Role of the Liver in Amino Acid Assimilation
- Amino Acid Absorption:
- After protein digestion in the stomach and small intestine, amino acids are absorbed into the bloodstream.
- These amino acids are transported to the liver, where they undergo further processing.
- Deamination:
- In the liver, excess amino acids cannot be stored; thus, they undergo deamination, a process where the amino group (NH₂) is removed.
- This reaction produces ammonia (NH₃), which is toxic to the body. The liver quickly converts ammonia into urea, a less harmful compound that can be excreted through urine.
- Protein Synthesis:
- The remaining carbon skeletons from deaminated amino acids can be used to synthesize new proteins as needed by the body.
- The liver assembles these amino acids into various proteins required for functions such as tissue repair, enzyme production, and hormone synthesis.
- Storage and Release:
- The liver also stores certain amino acids for future use, which is particularly important during periods of fasting or increased metabolic demand.
- This storage capability helps maintain a steady supply of amino acids for protein synthesis and energy production when dietary intake is insufficient.
- Formation of Urea:
- As a result of deamination, urea is formed and released into the bloodstream, where it is transported to the kidneys for excretion
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