The semi-synchronous orbit is a near-circular orbit (low eccentricity) 26,560 kilometers from the center of the Earth (about 20,200 kilometers above the surface). A satellite at this height takes 12 hours to complete an orbit.his special, high Earth orbit is called geosynchronous. A satellite in a circular geosynchronous orbit directly over the equator (eccentricity and inclination at zero) will have a geostationary orbit that does not move at all relative to the ground. It is always directly over the same place on the Earthâs surface.
The gastric chief cells of the stomach secrete enzymes for protein breakdown (inactive pepsinogen, and in infancy rennin). Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis.ydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis.
Etymology: Gk, hydor + chloros, green. an aqueous solution of hydrogen chloride or hydrogen ions and chloride ions. Hydrochloric acid is secreted in the stomach and is a major component of gastric juice.Biochemistry The acid in gastric juice, which is linked to the pain of GERD, heartburn. See GERD.ydrochloric acid. HCl, a normal constituent of gastric juice in humans and other animals. The absence of free hydrochloric acid in the stomach, called achlorhydria or gastric anacidity, may be found with chronic gastritis, gastric carcinoma, pernicious anemia, pellagra, and alcoholism.