Which of these structures is part of a muscle cell’s plasma membrane that delivers signals to the sarcomere?
A. myosin head
B. actin fiber
C. endoplasmic reticulum
D. T tubule
Answer:D
Which of these structures is part of a muscle cell’s plasma membrane that delivers signals to the sarcomere?
A. myosin head B. actin fiber C. endoplasmic reticulum D. T tubule