7.3 Smooth Muscle And Cardiac Muscle

Question 1

Small and spindle-shaped, usually with one nucleus per cell

Answer 1

Smooth muscle cells

Question 2

Contains less actin and myosin than skeletal muscles, and the myofilaments are not organized into sarcomeres

Answer 2

Smooth muscle cells

Question 3

The resulting periodic spontaneous contraction of smooth muscle

Answer 3

Autorhythmicity

Question 4

Long, striated, and branching, with usually only one nucleus per cell

Answer 4

Cardiac muscle

Question 5

Cardiac muscles cells are connected to one another by means of ______

Answer 5

Intercalated disks

Question 6

Specialized structures that include tight junctions and gap junctions that facilitate action potential conduction between the cells

Answer 6

Intercalated disks