Calorigenic action increase O, consumption of most tissues in the body increasing heat production and BMr mechanism A: Enhances Nat-K ATPase activity B: Causes the cell membrane of most cells to become leaky to Na* ionsCalorigenic action ◼ increase O2 consumption of most tissues in the body, increasing heat production and BMR. ◼ mechanism ◼ A: Enhances Na+-K+ ATPase activity ◼ B: Causes the cell membrane of most cells to become leaky to Na+ ions