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16 Cards in this Set

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Function of smooth muscle at hollow visceral organs and blood vessels:
Mixing and Propelling
What kind of control are SM cells under?
Involuntary
How many nuclei in smooth muscle cells?
One
Shape of nucleus in SM cells:
Fusiform
Longitudinal orientation of SMCs:
Staggered
When viewed in cross section are the diameters of sm muscles varied or consistently regular?
Varied
where are mitochondria found in smooth muscle cells?
In profuse collections adjacent to the nucleus.
What is structure in SM cells that is analogous to Zlines?
Dense bodies
What do Dense bodies contain?
Alpha actinin just like Z lines.
What invests each SM cell?
Basal lamina - just like in skeletal and cardiac.
What is the functional homologue of T-tubules in smooth muscle?
Pinocytotic vesicles
How are SM cells arranged in general compared to striated?
Randomly
What structure allows cell-cell communication in smooth muscle?
Gap junctions
What is the ratio of thin:thick filaments in SMCs?
12:1
What stimulates contraction in smooth muscle cells?
Calcium
How do SM cells regenerate after injury?
Via simple mitosis.