White Blood Cells that do not have granules in the Cytoplasm.
Agonist
The main Muscle that produces a particular Movement; also know as the Prime Mover.
Agglutinogen
Antigen on the Cell Membrane of Red Blood Cells that can provoke Antibody formation; Antigen-Antibody reaction produces clumping.
Agglutinin
The Antibody produced against Antigens on the Cell Membrane of Red Blood Cells; Antigen-Antibody reactions produce clumping.
Agglutination
The clumping of Red Blood Cells as a result of the Antigen-antibody reaction.
Afferent Arteriole
The Arteriole that brings Blood to the part: ie. Blood to the Glomeruli.
Adrenogenital Syndrome
A group of disorders resulting from abnormal, excessive secretion of androgens from the Adrenal Cortex; results in Masculinization of Women, Feminiation of men and Precocious Puberty in children.
Adrenocorticotropic Hormone (ACTH)
Secreted by the Anterior Pituitary, which regulates Hormone Secretion bu the Adrenal Cortex.