Question

How do muscle fibers respond to a stimulus?

Answer 1

Response of muscle fibers to stimuli:

1. Cells organize to form tissue, and tissues organize to form organs for a specific function.
2. There are four types of tissues: connective, muscle, nervous, and epithelial.
3. Muscle cells are excitable, which means they respond to stimuli.
4. They exhibit two types of movements.
5. Contractility: muscle tissue consists of cells that have the unique potential to shorten or contract.
6. Extensibility: They have the ability to extend beyond the normal resting point. It is also denoted as elasticity.
7. .This contraction and relaxation lead to the motion of the body parts.
8. The tissue is relatively elastic and is well provided with blood vessels.
9. Thus, in reaction to a stimulus, muscle fibers shorten or loosen up, and go back to their uncontracted state in a coordinated manner.
10. For example, when the plate is hot, the neurons signal your motor muscles to take your hand away.
11. Actin and myosin are two protein molecules present in muscles involved in the contraction of the muscle in both humans.
12. They work in coordination with other regulatory proteins like troponin, tropomyosin, and meromyosin.
13. Myosin converts chemical energy released from ATP into mechanical energy which is then used to pull the actin filaments along, causing muscle fibers to contract to generate movement.
14.