Which type of cells typically contain more mitochondria than others, and why?

• A. Nerve cells, because they transmit electrical signals.
• B. Bone cells, because they support the body's structure.
• C. Skin cells, because they are constantly regenerating.
• D. Muscle cells, because they require more energy for contraction.

Answer: (D)

Verified step by step guidance

1. Understand the function of mitochondria: Mitochondria are organelles known as the powerhouses of the cell. They are responsible for producing adenosine triphosphate (ATP), the energy currency of the cell, through a process called cellular respiration.
2. Consider the energy requirements of different cell types: Different cells in the body have varying energy needs based on their functions. Cells that perform more energy-intensive tasks will typically have more mitochondria.
3. Analyze the function of muscle cells: Muscle cells are involved in contraction, which is an energy-demanding process. During physical activity, muscle cells require a significant amount of ATP to sustain contractions and facilitate movement.
4. Compare muscle cells to other cell types: Nerve cells transmit electrical signals, bone cells provide structural support, and skin cells regenerate. While these functions require energy, muscle cells generally have higher energy demands due to their role in movement and contraction.
5. Conclude why muscle cells contain more mitochondria: Given their high energy requirements for contraction, muscle cells contain more mitochondria than other cell types to meet their ATP needs efficiently.