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.
The Fastest Shark In The World Is Also An Incredible High Jumper. Meet the shortfin mako shark! Not only can this mackerel shark hit a burst of speed of up to 46 MPH, it has also got an impressively athletic high jump that can propel it up to 30 feet in the air. Read all about it (and check out the video) after the jump!