Answer:
When people lift weights, microscopic damage (microtears) occurs to the myofibrils within the muscle fiber. These microtears stimulate the body's repair response. ... The increased number of myofibrils causes muscle fibers to enlarge, increasing their volume and size.
Explanation:
I think Oxygen is the best answer.
Photosynthesis occurs in the Chloroplasts.
The respiration takes place in the Mitochondria.
Hope this helps!! :)
I think the answer is 42kg m/s.
