A regional airline pilot flies passengers to and from small and mid-sized airports. They also ferry passengers to major airports, where connecting flights on larger planes await. Typically, a regional pilot carries between 19 and 70 passengers, depending on the size and type of planes the airline uses.fter gaining experience by accumulating flight hours, first officers may become captains, who earn an annual average of $55,000. If a captain is taken on by a major airline, it is usually to the position of first officer or flight engineer. Once promoted back to captain, the average annual salary is about $135,000.
1 The action potential opens gates in the muscle's calcium store (sarcoplasmic reticulum). 2  Calcium ions flow into the cytoplasm, which is where the actin and myosin filaments are. 3  Calcium ions bind to troponin-tropomyosin molecules located in the grooves of the actin filaments.
No doubt, calcium is a key component of strong bones but its presence in your muscles enables movement. Contraction and relaxation of your muscles occur because of rapidly changing concentrations of calcium inside your muscle cells, a biochemical process referred to as the calcium cycle.Too much or too little calcium in your blood may cause muscular symptoms due to disruption of the calcium cycle.o understand the calcium cycle, you need to know a bit about muscle cell anatomy. Strands of fibers called myofilaments are the distinguishing feature that separates muscle cells from other types of cells in your body.