It is a defect in the transport of neutral amino acids, especially tryptophan, in the intestine and kidney. Since tryptophan is needed for niacin synthesis, it can cause pellagra-like skin and neurological symptoms.
23.What is kwashiorkor and how is it related to amino acids?
Kwashiorkor is a form of severe malnutrition caused by inadequate dietary protein despite sufficient calorie intake. Low amino acid supply reduces albumin production, leading to widespread swelling called edema.
24.What is the amino acid pool?
It is the total collection of free amino acids present in the blood and tissues at any given time. It is maintained through dietary intake, protein breakdown, and internal synthesis.
25.How much dietary protein does an average healthy adult need daily?
Most healthy adults need roughly 0.8 to 1 gram of protein per kilogram of body weight per day. This requirement increases during pregnancy, growth, illness, or intense physical training.
26.Can vegetarians get all essential amino acids from their diet?
Yes, by combining different plant protein sources such as cereals and pulses together. This combination approach helps cover essential amino acids that any single plant source may lack.
27.What are glutathione and its connection to amino acids?
Glutathione is a small tripeptide made from glutamate, cysteine, and glycine that acts as a major antioxidant in the body. It helps protect cells from oxidative damage and supports liver detoxification.
28.Why is taurine considered essential in infants?
Infants have immature enzyme systems needed to synthesize taurine from cysteine on their own. Because of this, taurine is usually added to infant formula to meet their developmental needs.
29.How are urea cycle disorders different from disorders like PKU?
Urea cycle disorders directly affect ammonia removal and can cause rapid, severe hyperammonemia soon after birth. Disorders like PKU instead involve toxic buildup of a specific amino acid rather than ammonia itself.
30.Why should MBBS students focus on understanding amino acid pathways rather than memorizing them?
Understanding the pathway helps in reasoning through unfamiliar clinical cases and connecting symptoms to their underlying biochemical cause. This approach is far more useful in real patient care than memorized facts alone.
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