HSCI 100 Lecture Notes - Lecture 8: Homeostasis, Fetus, Cardiac Cycle
30 Oct 2016
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Document Summary
Transportation: oxygen, nutrients, wastes, co2, hormones and more. Regulatory functions: body temperature, water-salt balance, body ph. Formed elements: from cells produced in red bone marrow. 92% h2o and 8% salt and organic molecules. Albumins- most abundant and important for plasma"s osmotic pressure as well as the transport of other molecules. Globulins- transport lipids and fat soluble vitamins, some are antibodies. Fibrinogen- important for the formation of blood clots. Contains about 280 million hemoglobin molecules and each hemoglobin molecule binds. Production of rbc is controlled by negative feedback. Erythropoietin (epo) is excreted by kidney cells and moves to red marrow when oxygen levels are low. Old cells destroyed by liver and spleen. Anemia- a condition resulting from too few rbc"s or hemoglobin that causes a run-down feeling. Sickle-cell anemia- genetic disease that causes rbc"s to be sickle shaped that tend to rupture.
