You observe the structure and function of a muscle fiber in the lab. You find that membrane depolarization is not always necessary in order to cause contraction, and that actin filaments are not arranged longitudinally along the length of the fiber. Most likely you are observing a _______________________.

Question

Quizplus · Accepted Answer

Smooth muscle cells do not require membrane depolarization for contraction to occur, as they can be stimulated by various chemical signals. Additionally, their actin filaments are not arranged longitudinally but instead in a more disorganized manner, which is different from the highly organized structure seen in skeletal and cardiac muscle cells.

You Observe the Structure and Function of a Muscle Fiber