What term describes the increase in capillaries around the muscles, which means more blood flows, which gives you more oxygen?

What term describes the increase in capillaries around the muscles, which means more blood flows, which gives you more oxygen?

• A. The need for extra oxygen after strenuous exercise
• B. The amount of blood per beat
• C. Increase in capillaries around the muscles, which means more blood flows, which gives you more oxygen
• D. The pressure of circulating blood on the walls of blood vessels

Answer: (C)

Capillarisation is the growth of more capillaries around working muscles in response to regular aerobic training. This expanded network means blood can reach more muscle fibers and the distance oxygen has to diffuse from the blood to the mitochondria is shorter, so more oxygen is delivered to the muscles during exercise. That boost in oxygen availability supports sustained aerobic energy production and improves endurance. The other options describe oxygen needs after exercise, the amount of blood pumped per beat, or blood pressure, none of which explain the increase in capillary networks that enhances oxygen delivery.

Capillarisation is the growth of more capillaries around working muscles in response to regular aerobic training. This expanded network means blood can reach more muscle fibers and the distance oxygen has to diffuse from the blood to the mitochondria is shorter, so more oxygen is delivered to the muscles during exercise. That boost in oxygen availability supports sustained aerobic energy production and improves endurance. The other options describe oxygen needs after exercise, the amount of blood pumped per beat, or blood pressure, none of which explain the increase in capillary networks that enhances oxygen delivery.