MicroAnatomy 11.2: Muscle, continued
About this set
Created by:
skyliele on March 25, 2009
Subjects:
Physical Therapy, Microscopic Anatomy, histology
Classes:
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20 terms
Terms | Definitions |
|---|---|
 Are triglycerides stored in skeletal muscle? | no |
| Shape of smooth muscle cells | Fusiform/spindly |
| Non-striated muscle cells are | Smooth muscle cells |
| What surrounds a smooth muscle? | Basal lamina and a layer of reticular fibers |
| This type of muscle contains no troponin | Smooth |
| This type of muscle has no myofibrils or sarcomeres | Smooth muscle cells |
| In smooth muscle, the "z-lines" are known as | Dense bodies |
| Myofilament bundles (thick and thin) run.. In smooth muscle | obliquely through each cell |
| In cross section, smooth muscle cells have this shape | round |
| Thick filaments have this type of end in smooth muscle | Bare regions without heads |
| More of the myofilaments of smooth muscle are ___ | Actin. In skeletal muscle there is less actin in 6:1 versus 12:1 |
| Myofibrils are | chains of sarcomeres |
| T-tubules are located only in these muscle types | skeletal and cardiac |
| Protein of dense bodies in smooth muscle | Alpha Actin. (also in the I-band) |
| Contractile forces are transmitted via... in smooth muscle | Dense bodies |
| Neural stimulation of smooth muscle occurs how? | ANS terminates nearby. Transmitters diffuse to smooth muscle and this causes Ca channels to open and an influx of Ca. No clear synaptic regions |
| inside of a smooth muscle cell, Ca binds with | Calmodulin |
| The Ca-calmodulin complex activates... | myosin light chain kinase which is responsible for the phosphorylation of myosin, therefore allowing it to interact with actin |
| Speed of smooth muscle contractions | Slow |
| When contracted, a smooth muscle cell looks like a | worm |
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