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Anatomy weeks 1-5
Term | Definition |
---|---|
Anatomy | The study of the structure of an organism and relationships of its parts. |
Physiology | Science that deals with the functions of the living organism and its parts. |
Atomic Number | the number of protons in an atom's nucleus. |
Atomic Mass | The number of protons plus the number of neutrons in an atom's nucleus. |
Isotope | Atoms of an element that contain the same amount of protons, but differnt amount of neutrons. |
Ionic bond | A chemical bond formed by the transfer of electrons from one atom to another. |
Covalent bond | A chemical bond formed by the sharing of one or more pairs of electrons between the outer energy levels of two atoms. |
Synthesis reaction | A reaction in which two or more substances combine to form a more complex substance. |
Decomposition reaction | A reaction that results in the breadown of a complex substance into two more simpler substances. |
Exchange reaction | A reaction that permits two different reactants to exchange components, and as a result, form two new products. |
Exocrine glands | Glands that discharge their secretions products into ducts. |
Endocrine glands | Glands that discharge their secretions products directly into the blood. |
Melanocytes | Cells within the skin layers that contribute colored pigments to the skin and serve to decrease the amount of ultraviolet kight that can penetrate into deeper layers of the skin. |
Osteoblasts | Cells that synthesize and secrete an organic matrix called osteoid. |
Osteoclasts | Giant multinucleate cells that are responsible for the active erosion of bone minerals. |
Osteocytes | Mature, nondividing osteoblasts that have become surrounded by matrix and now lie within lacunae. |