at http://thepoint.lww.com The number and proportion of older individuals in the total population is increasing rapidly in the United States and other developed nations. There are a number of physiological…
at http://thepoint.lww.com Hemoglobin and myoglobin are chemically similar molecules that contain porphyrin groups. Porphyrins are cyclic structures comprised of four pyrrole rings joined by methine bridges. The arrangement of the…
at http://thepoint.lww.com Key Terms Bioaccumulation Body burden Dose–response relationship Drugs of abuse ED50 Individual dose–response relationship LD50 Poisons Quantal dose–response relationship TD50 Therapeutic index Toxicokinetics Toxicology Toxins Xenobiotics Toxicology is…
at http://thepoint.lww.com CALCIUM HOMEOSTASIS Serum calcium level is maintained at a constant level for the optimal excitability of neural and muscular tissue and the coordinated functioning of various organ systems…
FIGURE 9.1 DNA molecule. The double helix of the DNA is shown along with details of how the bases, sugars, and phosphates connect to form the structure of the molecule….
at http://thepoint.lww.com THE TESTES By the 6th week of development in both sexes, the primordial germ cells have migrated from their extraembryonic location to the gonadal ridges, where they are…
at http://thepoint.lww.com The gastrointestinal (GI) system is composed of the mouth, esophagus, stomach, small intestine, and large intestine. Digestion, which is primarily a function of the small intestine, is the…
at http://thepoint.lww.com THE THYROID The thyroid gland is responsible for the production of two hormones: thyroid hormone and calcitonin. Calcitonin is secreted by parafollicular C cells and is involved in…
at http://thepoint.lww.com The term pituitary (derived from both Latin and Greek) literally means to “spit mucus,” reflecting the primitive notion of pituitary function. In one way, the ancient physiologists were…
at http://thepoint.lww.com Key Terms Airborne pathogens Biohazard Bloodborne pathogens Carcinogens Chemical hygiene plan Corrosive chemicals Cryogenic material Fire tetrahedron Hazard Communication Standard Hazardous materials High-efficiency particulate air (HEPA) filters Laboratory…
