Cholera toxin is secreted by vibrio cholera bacteria. vibrio cholera bacteria colonize the gut. intestinal cells infected with cholera toxin maintain abnormally high camp levels. intestinal cells infected with cholera toxin import abnormally high levels of salts and fluids into the bloodstream. cholera toxin alters gsα so that it no longer hydrolyzes gtp.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.