![]() Through the ingestion of 0.5-1.5 grams (in adults) the magnesium hydroxide will act by simple acid neutralization in the stomach. According to the amount ingested, the magnesium hydroxide will either act as an antacid or a laxative. The suspension of magnesium hydroxide is ingested and enters the stomach. This creates distension of the colon which results in an increase in peristaltic movement and bowel evacuation. Magnesium hydroxide enhances the integrity of the mucosal barrier of the stomach as well as improving the tone of both the gastric and esophageal sphincters.Īs a laxative, the magnesium hydroxide works by increasing the osmotic effect in the intestinal tract and drawing water in. There, it decreases the direct acid irritant effect and increases the pH in the stomach leading to inactivation of pepsin. It is practically insoluble in water and does not have any effect until it reacts with the hydrochloric acid in the stomach. It also reduces stomach acid by reacting with hydrochloric acid to form Mg chloride.Īs an antacid, magnesium hydroxide suspension neutralizes gastric acid by reacting with hydrochloric acid in the stomach to form magnesium chloride and water. The Friends of San Pedro operate a bookstore and information center.Magnesium hydroxide increases peristaltic activity causing osmotic retention of fluids, thus resulting in bowel evacuation. The San Pedro House, located 9 miles east of Sierra Vista on Arizona Route 90, is a popular trailhead for birdwatchers, hikers, and mountain bikers. Hike about 2 miles to the ruins and interpretive displays. From Fairbank on Arizona Route 82, drive approximately 2 miles west on Route 82, turn right on the Kellar Ranch Road and travel approximately 3 miles to the trailhead. Only a stone foundation and a few remaining adobe wall remnants mark the location of an isolated and dangerous military station. These fortresses marked the northern extension of New Spain into the New World. The Spanish Presidio Santa Cruz de Terrenate is the most intact remaining example of a once-extensive network of similar presidios. Turn left, and go about 1.2 miles to the signed turnoff to Murray Springs. From Sierra Vista, take Arizona Route 90 east 6 miles to Monson Road. ![]() ![]() An interpretive trail leads visitors through the site. ![]() Named after the distinctive and beautifully crafted Clovis spear points they made, they were expert hunters of the large mammals of the last Ice Age. They belonged to what we now call the Clovis Culture and were the earliest known people to have inhabited North America. People first arrived in this area 11,000 years ago. Excavations were conducted by the University of Arizona from 1966 to 1971. Murray Springs Clovis Site, a significant archaeological site that contains an undisturbed stratigraphic record of the past 40,000 years. Many recreational opportunities are available within the NCA. The primary purpose for the designation is to protect and enhance the desert riparian ecosystem, a rare remnant of what was once an extensive network of similar riparian systems throughout the Southwest. The San Pedro riparian area, containing about 40 miles of the upper San Pedro River, was designated by Congress as a National Conservation Area (NCA) on November 18, 1988.
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