Final answer:
Mitochondria is the component of muscle that has no change during aerobic exercise.
Step-by-step explanation:
The correct answer to the question is d.) Mitochondria.
During aerobic exercise, which involves activities like running, swimming, and cycling, there is an increase in oxygen demand by the muscles. As a result, several components of the muscle undergo changes to adapt to the increased demand for energy. One of these changes occurs in the number and size of mitochondria, which are responsible for producing energy in the form of ATP. Mitochondria enlarge and multiply in response to regular aerobic exercise, allowing the muscle to generate more energy.
However, the other options listed in the question, myoglobin, myofibrils, and blood capillaries, all undergo changes as a result of aerobic exercise. Myoglobin, a protein that stores oxygen in muscle cells, increases in concentration to enhance the delivery of oxygen to working muscles. Myofibrils, which are the contractile units of muscle fibers, increase in number through a process called hypertrophy during aerobic exercise. Blood capillaries, small blood vessels that supply oxygen and nutrients to muscle cells, also increase in number to improve the delivery of oxygen and remove waste products during aerobic exercise.
Learn more about Aerobic exercise and its effects on muscle components