Topic 34 - Smooth Muscle

Question 1

Smooth muscle myofibres are formed by?

Answer 1

-Smooth muscle myofibers formed by mononucleated spindle-shaped cells.

Question 2

SMooth muscle function?

Answer 2

-Slow contraction without fatigue. Involuntary impulse generated by vegetative plexus.

Question 3

Smooth muscle, where do we find them?

Answer 3

-Found in wall of visceral organs

Question 4

Morphology of smooth muscles?

Answer 4

• Lacks striations and perimysium.
• Central rod-shaped nucleus.
• Spindle shaped cells
• Contraction occurs between outer myosin bundles attached to dense bodies.
• Innervation is uniform (motor and sensory are indistinguishable).