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.
whale sharks are slow swimmers and their top speed is no more than 5 miles 8 kilometers per hour probably due to the fact that whale shark is the biggest fish in the world it reaches a length of 40 ft 12 m and weighs up to 13 tons 12 metric tonsgreat white sharks are one of the fast movers in waterormally sharks swim at a speed of less than 5 kph but few species such as mako sharks are able to cruise at a speed of 48 kph makos are the world s fastest swimmers