Red blood cells lack mitochondria. As a result, ATP production is solely through
citric acid (Krebs) cycle
glycolysis
aerobic respiration
electron transport chain
The Correct Answer is B
A. Citric acid (Krebs) cycle: This occurs in the mitochondria, which RBCs do not possess.
B. Glycolysis: RBCs rely entirely on anaerobic glycolysis in the cytoplasm for ATP production due to their lack of mitochondria.
C. Aerobic respiration: This requires mitochondria, which are absent in RBCs.
D. Electron transport chain: This also occurs in the mitochondrial membrane, and RBCs can’t perform this process.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Impermeability of the collecting tubule to water: In the absence of ADH, the collecting duct is impermeable to water, allowing dilute urine to be excreted.
B. The presence of ADH: ADH increases water reabsorption, leading to concentrated urine, not dilute.
C. Relative permeability of the distal tubule to water: If the tubule is permeable to water (due to ADH), water is reabsorbed, and urine becomes concentrated.
D. Transport of sodium and chloride ions out of the descending nephron loop: The descending limb is not permeable to salts-only the ascending limb actively reabsorbs Na⁺ and Cl⁻.
Correct Answer is A
Explanation
A. Intrinsic factor: Intrinsic factor, secreted by parietal cells, is essential for vitamin B₁₂ absorption in the ileum. Vitamin B₁₂ is needed for RBC production and hemoglobin synthesis.
B. Gastric lipase: Gastric lipase breaks down lipids, not involved in hemoglobin production.
C. Pepsinogen: Pepsinogen is converted to pepsin, which digests proteins-not related to RBC or hemoglobin synthesis.
D. HCl: Hydrochloric acid helps activate enzymes and digest food, but does not directly influence hemoglobin production.
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