Chapter 10, Problem 21CYR

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._____ ${\text{Ca}}^{2+}$ binding to troponin is the initiating event of contraction.

g._____ ${\text{Ca}}^{2+}$ binding to calmodulin is the initiating event of contraction.

h._____The sarcolemma has a distinct motor end plate.