Factors affecting consumer buying behaviour. This essay has been submitted by a student. This is not an example of the work written by our professional essay writers. In the early history consumer behaviour has led to theories, research methods and background knowledge of the consumer economy and self-service concepts.
The role of calcium entry in cardiac excitation-contraction coupling was subsequently explained by the finding that calcium release from the cardiac SR, unlike that of skeletal muscle, depends on a small calcium influx across the plasma membrane in a process called âcalcium-triggered calcium releaseâ. 36 Calcium release from the cardiac SR, which causes localized âcalcium sparksâ that can be visualized when cells are injected with calcium-sensitive dyes, 37 38 is a critical ...
The sarcoplasmic reticulum of cardiac-muscle cells is not as well-developed as that of skeletal-muscle cells. Cardiac-muscle contraction is actin-regulated, meaning that the calcium ions come both from the sarcoplasmic reticulum (as in skeletal muscle) and from outside the cell (as in smooth muscle).therwise, the chain of events that occurs in cardiac-muscle contraction is similar to that of skeletal muscle. Compared to skeletal muscle, smooth-muscle cells are small. They are spindle-shaped, about 50 to 200 microns long and only 2 to 10 microns in diameter.