The main hormone that acts on the kidneys to regulate sodium ion concentration of the extracellullar fluid (ecf) is:

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

One function of the immune system is to attack the foreign cells to protect the body. in organ translate , the body recongnizes that the new organ is made of foreign cells. wha kind of medicine would you give a patient to increase the chances of transplate success