Angiotensin II is a potent vaso-active peptide that causes blood vessels to constrict, resulting in increased blood pressure. Angiotensin II also stimulates the secretion of the hormone aldosterone from the adrenal cortex. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood.
The most reliable record of a Blue Shark at speed is 24.5 miles (39.4 kilometres) per hour for a 6.5-foot- (2-metre-) long individual. The Shortfin Mako (Isurus oxyrinchus) is probably the champion speedster among sharks.
SPEED: Great white sharks can swim at speeds approaching 25 miles per hour (40 km per hour) with burst speeds to 35 miles per hour (56 km per hour). LONGEVITY: Great white sharks reach maturity around 15 years of age and have a life span of over 30 years.