The function of the sarcoplasmic reticulum is to store and release calcium ions in the body's muscle cells, according to the Dr. Evangelia Kranias Lab at the University of Cincinnati. The sarcoplasmic reticulum is the main organ through which calcium in the muscles is handled and regulated.Know More
The role of the sarcoplasmic reticulum of smooth muscles may change as the body changes physiological states or experiences illness and disease, reports a study published by the National Center for Biotechnology Information. In addition to being a calcium storage mechanism, the sarcoplasmic reticulum was originally thought to be synthetic and a storage mechanism for contractile proteins. The National Institutes of Health study points out that researchers have expanded the explanation of the sarcoplasmic reticulum's functions to include homeostasis and contribution to signaling in other organelles such as the nucleus and mitochondria.
The sarcoplasmic reticulum is similar in structure to the endoplasmic reticulum, except for the assortment of proteins it contains, says Wikipedia. This one difference causes both organs to function quite differently in the body. The sarcoplasmic reticulum stores large amounts of calcium and then releases it when muscles become stimulated, but the endoplasmic reticulum mainly synthesizes and transports proteins to a cell system known as the Golgi apparatus.Learn more about Muscles
The muscular system supports body movement, maintains posture, and circulates blood through the body. According to Live Science, the system consists of 650 skeletal, smooth and cardiac muscles.Full Answer >
The rectus abdominis is a muscle located in the front of the torso that gives the body support during bowel movements and while coughing. This muscle also helps women deliver children and is activated whenever a person completes crunches or sit-ups.Full Answer >
According to the New York Times, a vascular spasm is when the muscle cells within the walls of a blood vessel briefly tighten. Vascular spasms occur when the blood flow is blocked by a blood vessel that has significantly decreased in size or completely closed up.Full Answer >
Both skeletal muscles and cardiac muscles contain striations among muscle cells and produce strong contractions, according to class notes from Yale University. Striations occur in crossing, alternating light and dark bands produced by proteins that make muscles contract, according to Dictionary.com.Full Answer >