Question

multiple choice question
some cells such as ______ depend almost exclusively on carbohydrates for their energy needs.

○ liver and stomach cells
○ osteocytes and lymphocytes
○ skeletal muscle cells
○ neurons and erythrocytes

Explanation:

To solve this, we analyze each option:

• Liver cells can use fats/proteins, stomach cells use various fuels. Eliminate "liver and stomach cells".
• Osteocytes (bone cells) and lymphocytes (immune) don't rely exclusively on carbs. Eliminate "osteocytes and lymphocytes".
• Skeletal muscle can use glycogen (carb) but also fats during rest. Not exclusive. Eliminate "skeletal muscle cells".
• Neurons rely on glucose (carb) as they can't use fat efficiently. Erythrocytes (red blood cells) have no mitochondria, so they use glucose via glycolysis exclusively. Thus, "neurons and erythrocytes" is correct.

Answer:

D. neurons and erythrocytes (assuming the last option is labeled D; if labels were A - D as per order: A. liver and stomach cells, B. osteocytes and lymphocytes, C. skeletal muscle cells, D. neurons and erythrocytes)