The adrenal glands sit on top of the kidneys. They regulate the bodyâs response to stress by making hormones, including adrenaline and cortisol. People use adrenal extract taken from animals in the hope that the extract will function like the bodyâs adrenal gland.DRENAL EXTRACT Overview Information. Adrenal extract is a chemical that is made from the adrenal glands of slaughtered cows, pigs, and sheep. Adrenal glands make certain hormones. People use the extract as a medicine.
The earth's crust consists of a number of sections or plates that float on the molten rock of the mantle. These plates move on convection currents caused by heat rising from the center of the earth. The hot magma rises and spreads out on the surface, creating new crust.
What causes the plates to move? This is another one of those questions in geology that we may never know an answer to FOR SURE. Lots of mechanisms have been proposed (and rejected), but one thing is nearly certain - whatever the force, it's got to be REAL powerful. Let's play with some approximate numbers. Assume that average continental crust has a density of approximately 2.75 time the density of water.