Quiz 31: Homeostasis: Internal Fluids and Respiration

Biology

The chief intracellular electrolytes are: • Potassium • Magnesium • Phosphate ions • Proteins The chief extracellular electrolytes are: • Sodium • Chloride • Bicarbonate ions

The fate of spent RBC in the body is its fragmentation after 4 months. After it fragments, the macrophages of the spleen, liver and bone marrow engulf them by the process of phagocytosis. The iron in the hemoglobin is removed and used again in the synthesis of new RBC. The rest of the heme molecule is converted to bilirubin which is a pigment present in bile. The rest of the RBC is degraded.

The steps involved in clotting of blood are: img Thrombin combines with soluble fibrinogen present in the blood and forms insoluble fibrin. Fibrin forms thread-like structures that form a sticky mass. The mass that is formed at the cut becomes denser and denser and is called the clot.

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