For each description of skeletal muscle activity A–E, select the most appropriate option from the following list of contrasting muscle attributes.
1. Energy produced in mitochondria.
2. Energy produced outside mitochondria.
3. Low level of myoglobin.
4. High level of myoglobin.
5. Low density of capillaries.
6. High density of capillaries.
A. Adaptation to aerobic activity is associated with increased ability to store oxygen intracellularly.
B. Adaptation to anaerobic activity is associated with a low rate of oxygen uptake by the cell.
C. Anaerobic activity is associated with a high rate of breakdown of glucose.
D. Typical massively muscular strong individuals can lift huge weights but rapidly flag when trying to run.
E. Rapid twitch muscle is typically pale in comparison with slow endurance muscle.