RSSCategory: SAQ

Role of calcium in acute cell injury

Role of calcium in acute cell injury

What is the role of calcium in acute cell injury?   Cell injury is accompanied by an increased concentration of free calcium ions in the hyaloplasm (cytosol). These calcium ions are derived from the extracellular fluid, from the mitochondrial compartment, and from the cisterns of RER. Ionized calcium amplifies the adverse effects of hypoxia by […]

March 4, 2013 | By | Reply More
How does ATP deficiency cause cell swelling

How does ATP deficiency cause cell swelling

How does ATP deficiency cause cell swelling? The cell volume depends on the proper functioning of the plasma membrane, which remains semipermeable only if properly energized with ATP. ATP provides fuel for the Na/K ATPase, which acts as a pump, keeping the high concentration of sodium in the intercellular fluid and the high concentration of […]

March 4, 2013 | By | Reply More
Comparison of the paralleling and bisected angle techniques

Comparison of the paralleling and bisected angle techniques

Comparison of the paralleling and bisected angle techniques The advantages and disadvantages of the two techniques can be summarized as follows: Advantages of the paralleling technique • Geometrically accurate images are produced with little magnification. • The shadow of the zygomatic buttress appears above the apices of the molar teeth. • The periodontal bone levels […]

March 4, 2013 | By | Reply More
How do X-rays cause damage

How do X-rays cause damage

How do X-rays cause damage The precise mechanism of how X-rays cause these damaging effects is not yet fully known, but two main mechanisms are thought to be responsible: Direct damage to specific targets within the cell Indirect damage to the cell as a result of the ionization of water or other molecules within the […]

March 4, 2013 | By | Reply More
Thrombopoietin: Physiology, Pharmacology, Receptor, Clinical uses, Side effects

Thrombopoietin: Physiology, Pharmacology, Receptor, Clinical uses, Side effects

Thrombopoietin: Physiology, Pharmacology, Receptor, Clinical uses, Side effects Physiology The primary site of thrombopoietin production is the liver. Lesser amounts are seen in the kidneys, brain and testes. Thrombopoietin is synthesized and immediately released as and when required like erythropoiesis. Following a fall in the platelet count thrombopoietin levels rises half maximally by 8 hours […]

February 7, 2013 | By | Reply More
Short notes on Mitochondria

Short notes on Mitochondria

Definition : The mitochondria are the powerhouse of the cell. ii. Total number per cell : Varies from less than one hundred up to several thousand. iii. Size and shape : It is variable in size and shape. Some are only a few hundred nanometers in diameter and globular in shape, where as others are […]

April 30, 2012 | By | Reply More
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