Smooth Muscle Flashcards
What are the two layers of smooth muscle
Longitudial and circular
What layer is parallel to the long axis, and typically the outer layer
Longitudinal
What layer is perpendicular to the long axis and constricts the lumen
Circular
What is a varcosity and where would you find it
Swellings in the axons
What do varcosities store
Neurotransmitter
Unitary smooth muscle have lots of this thing so that the AP runs through all the cells
Gap junctions
Does multi unit SM contract spontaneously
no
Does unitary SM contract spontaenously
yes
where would you find unitary smooth muscle
Hollow organs
Name 3 locations you would find multi unit SM
Airways
Iris
Arrector pili muscles
What type of SM has independant fibers
Multi unit
What type of SM has fibers all attached
Unitary
What forms the lattice to transmit tension to the sarcolemma
Intermediate filaments
What anchors the intermediate and thin filaments
Dense bodies
Caveola in SM has lots of what
Voltage gated calcium channels