Metabolism — Flashcards

Flashcard 1381: The pK of the HCO3-/CO2 buffer is _____

Answer: 6.1

Flashcard 1382: Is the conversion of ribulose-5-P into ribose-5-P (HMP shunt) a reversible or irreversible reaction? _____

Answer: Reversible

Flashcard 1383: Does the metabolism of **cationic** amino acids (e.g., lysine, arginine) cause a change in blood pH? _____

Answer: Yes (decreased)

Extra: The metabolism of **cationic** amino acids (Arginine, Lysine, Histidine) and **sulfur-containing** amino acids (Methionine, Cysteine) results in the net production of fixed acids (H+), which decreases blood pH. Conversely, the metabolism of **anionic** amino acids (Glutamate, Aspartate) and other organic anions (like citrate or lactate) consumes H+, which increases blood pH.

Flashcard 1384: Glucose-6-phosphate dehydrogenase (G6PD) is stimulated by _____

Answer: NADP+

Flashcard 1385: What vitamin is necessary for differentiation of specialized epithelial surfaces? _____

Answer: Vitamin A

Flashcard 1386: What do the carrier molecules NADH, NADPH, and FADH2 carry in their activated forms? _____

Answer: Electrons

Flashcard 1387: Vitamin C excess may cause _____ nephrolithiasis

Answer: calcium oxalate

Flashcard 1388: The most common cause of cretinism worldwide is _____

Answer: Iodine Deficiency

Flashcard 1389: TSH increases which 2nd messenger?_____

Answer: cAMP

Flashcard 1390: Vitamin B12 deficiency may occur with _____ insufficiency; due to inability to cleave R-binder from B12

Answer: pancreatic