Tagged: Alanine

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Which amino acid is both glucogenic as well as ketogenic ?

A 54-year-old male who was diagnosed with HIV (human immuno deficiency virus) infection 2 years back, is currently in the terminal stage. He is now cachectic and having a difficult time obtaining any caloric intake yet he refuses to take a naso gastric or gastric feeding tube. Since his muscle and organs are metabolically active, which of the following amino acids will produce both glucose and ketone bodies as an energy source? A. Alanine B. Tyrosine C. Proline D. Glycine E. Leucine The correct answer is B- Tyrosine. Amino acids can be classified based on their metabolic fate- I) Purely...

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Prolonged fasting and gluconeogenesis…

A 14-year-old high school girl who is extremely conscious about her appearance has gone a full day fasting to fit in to a dress she intentionally brought a size smaller than her actual size for a dance party. Which of the following organs/tissues contribute to the glucose that is being synthesized through gluconeogenesis during periods of prolonged fasting? A. Spleen B. Red blood cells C. Skeletal muscle D. Liver E. Brain D-Liver is the correct answer. Gluconeogenesis is the process of converting noncarbohydrate precursors to glucose or glycogen. The major substrates are the glucogenic amino acids, lactate, glycerol, and propionate....

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Case study- Starvation

Case details A 25 –year-old woman living alone became severely depressed after the termination of her engagement. Two months later, she was brought to the emergency room by a friend because of weakness and lethargy. She appeared thin and pale. Questioning revealed that she had not eaten for several weeks. Analysis of a plasma sample indicated elevated levels of acetoacetate, β hydroxybutyrate, and blood urea nitrogen (BUN). However her plasma glucose concentration was within normal limits. She was hospitalized, given intravenous feeding and antidepressant medications and subsequently shifted to an 1800 Cal (7500 kJ) diet. Her recovery was uneventful. During...

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Answer to the question- Amino acids in the post absorptive state ..

During a medical rotation, a medical student volunteered for a respiratory physiology exam that determines basal metabolic rate and the respiratory quotient. She followed the protocol for a resting individual in the post absorptive state. Which of the following amino acids would be found in the highest concentration in serum? A. Alanine and Glutamine B. Arginine and Ornithine C. Glutamate and Aspartate D. Branched chain amino acids E. Hydrophobic amino acids Answer- A- Alanine and Glutamine. Post absorptive state is the state of the body 3-5 hours after meals. It is that period of time in the body during which...

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Amino acids in the post absorptive state ?

Question of the day During a medical rotation, a medical student volunteered for a respiratory physiology exam that determines basal metabolic rate and the respiratory quotient. She followed the protocol for a resting individual in the post absorptive state. Which of the following amino acids would be found in the highest concentration in serum? A. Alanine and Glutamine B. Arginine and Ornithine C. Glutamate and Aspartate D. Branched chain amino acids E. Hydrophobic amino acids   Figure- Post absorptive state For answer follow the link http://usmle.biochemistryformedics.com/answer-to-the-question-amino-acids-in-the-post-absorptive-state/ Please help Biochemistry for Medics by “CLICKING ON THE ADVERTISEMENTS” every time you visit...

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