It's is called a generation gap.
i tried searching up the answers, and do a quick skim of things but i couldnt find any valid explanation. if i had to choose any id say D or C. leaning a little more to C, but im not exactly sure. ill keep looking, i hope you figure it out! sorry!
Answer:
The duty cycle
Explanation:
Muscle shortening occurs when myosin heads bind to actin filaments and pull the actin inwards. As an energy action, the duty cycle is the fraction of one period in which myosin head is active for the muscle shortening. This period is expressed as a percentage or a ratio when myosin heads complete an on-and-off cycle.
