LIFESCI 2N03 Lecture Notes - Lecture 71: Iron-Deficiency Anemia, Heme Oxygenase, Chard
20 Apr 2016
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Document Summary
Blood components: 55% plasma (fluid portion of blood that contains proteins, glucose, clotting factors), less than 1% leukocytes (platelets and while blood cells), 45% erythrocytes (rbcs, carries oxygen) Platelets involved in blood clotting: normally suspended in plasma; when signaled, activated and aggregate clotting tightly controlled. Vitamin k: activates proteins involved in blood clotting; k = koagulation (danish for coagulation: converts prothrombin to thrombin which is needed for blood clot formation, deficiency: poor/no blood clotting. From the liver sources of vitamin k: some synthesized by gi bacteria, green vegetables and vegetable oils, absorption ranges from 40-70% from foods, inadequate k leads to low bone density while adequate k protects against fractures. Vitamin k participates in metabolism of osteocalcin (a bone protein) Iron is a concern for women, those who intake lower iron-rich foods, athletes due to high iron demands of muscle for myoglobin and etc, and especially vegan women.
