Mark the following statements as true for smooth muscle tissue, cardiac muscle tissue, and/or skeletal muscle tissue.          

a. ____Actin attaches to dense bodies.          ​​​​

b. ____Cells are joined by intercalated discs.          ​​​​

c. ____The thick and thin filaments are arranged into sarcomeres.          ​​​​

d. ____The thick filaments contain myosin heads along their entire length.          ​​​​

e. ____The cells depolarize and contract as a unit.          ​​​​

f. ____ Ca2+ binding to troponin is the initiating event of contraction.          ​​​​

g. ____Ca2+ binding to calmodulin is the initiating event of contraction.          ​​​​

h. ____The sarcolemma has a distinct motor end plate.