Question 1
A change in smooth muscle cell contraction in the absence of a change in electrical potential of the cells is described as a(n)
◦ slow wave potential.
◦ pacemaker potential.
◦ pharmacomechanical coupling.
◦ electromechanical coupling.
Question 2
Which is NOT a correct comparison of cardiac myocytes to other muscle cell types?
◦ Like some smooth muscle cells, cardiac myocytes are electrically coupled.
◦ Like smooth muscle cells, some cardiac myocytes have pacemaker potentials.
◦ Like skeletal muscle, contraction of cardiac muscle is under autonomic nervous control.
◦ Like skeletal muscle cells, actin and myosin are organized into sarcomeres.
◦ Like smooth muscle cells, cardiac muscle is under hormonal control.