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In smooth muscle the calcium needed for contraction comes mainly from?
In smooth muscle, the calcium needed for contraction primarily comes from the extracellular space. When smooth muscle cells are stimulated, calcium channels in the cell membrane open, allowing calcium ions to flow into the cell. Additionally, some calcium can also be released from the sarcoplasmic reticulum, but the extracellular influx is the main source for initiating contraction. This influx of calcium activates the contraction process by interacting with calmodulin and subsequently activating myosin light chain kinase.
What are the Skeletal muscle cells that function in calcium storage?
Sarcoplasmic reticulum is the type of skeletal muscle cell that functions in calcium storage. It plays a critical role in regulating intracellular calcium levels during muscle contraction and relaxation.
Where is calcium stored in the muscle cell?
The sarcoplasmic reticulum is known for its storage of calcium ions in muscle cells.
What shape of cell is the smooth muscle?
Smooth muscle cell are spindle-shaped.
Is muscle cell is smooth when hungry?
No, "smooth" muscle is a type of muscle.
Why is the regulation of calcium levels so important?
So that the nervous and muscular systems can function properly. Calcium is essential to life, and is used primarily for three things: intracellular cell signaling, muscle cell contraction and nerve cell activity.
What is the shape of the smooth muscle?
Smooth muscle cell are spindle-shaped.
What chemical binds to the muscle cell memebrane causing a temporary rush of what into the muscle cell?
Acetylcholine binds to the muscle cell membrane, causing a temporary rush of calcium ions into the muscle cell. This influx of calcium triggers muscle contraction.
What does the smooth er do for the cell?
it stores calcium
What muscle cell type has non striated and involuntary features?
The muscle cell type that is non-striated and involuntary is smooth muscle. Smooth muscle cells are found in the walls of hollow organs such as the intestines, blood vessels, and the bladder. Unlike skeletal muscle, which is striated and under voluntary control, smooth muscle operates autonomously, regulated by the autonomic nervous system and hormones. This allows for functions like peristalsis and blood vessel regulation without conscious effort.
Which muscle tissue has several nuclei per cell?
Smooth muscle tissue
After nervous stimulation of the muscle cell has ceased the calcium in the muscle?
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