C) thin and thick filaments are aligned in sarcomeres like skeletal muscles
Sarcomeres are the basic unit of skeletal muscle fibers, consisting of a protein complex of thick and thin filaments. They are responsible for the contraction of muscle fibers when stimulated, and are made up of actin and myosin filaments held together by a specialized protein called titin.
Characteristic of smooth muscles:
1. Smooth muscles are involuntary muscles which are not under conscious control.
2. They are found in the walls of hollow organs, blood vessels, and the digestive and respiratory tracts.
3. They have a single nucleus and spindle-shaped fibers.
4. They are capable of sustained contractions and slow, rhythmic contractions.
5. Smooth muscle contractions are not as strong as those of skeletal muscles.
6. They are highly responsive to hormones and other nerve signals.
To learn more about sarcomeres refer to:
https://brainly.com/question/12857749
#SPJ1
