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Atherosclerosis

| December 13, 2013 | 0 Comments
Atherosclerosis

Atherosclerosis When pipes get clogged, its usually because we flushed something down the drain we shouldn’t have. Sometimes, build-up inside of pipes causes clogging. In arteriosclerosis, the walls of the arteries become thick and stiff and hypertension results. In atherosclerosis, which is the most common form of arteriosclerosis, small patchy areas called atheromas form that […]

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Hemophilia & Thrombocytopenia

| December 13, 2013 | 0 Comments
Hemophilia & Thrombocytopenia

Anything that interferes with the clotting mechanism of blood can cause abnormal bleeding. The most common causes are platelet deficiency (thrombocytopenia) and deficits of some clotting factors, which can result from impaired liver function or genetic conditions such as hemophilia. Thrombocytopenia Thrombocytopenia is a condition in which the number of circulating platelets is deficient, which […]

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Osteoporosis

| December 12, 2013 | 0 Comments
Osteoporosis

Osteoporosis Osteoporosis refers to a group of diseases in which bone resorption outpaces bone deposit (i.e. bone loss occurs faster than bone growth). The bones become so fragile that something as simple as a hefty sneeze or stepping off a curb can cause them to break. The composition of the matrix remains normal, but overall […]

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Skin Cancer: Carcinoma & Melanoma

| December 12, 2013 | 2 Comments
Skin Cancer: Carcinoma & Melanoma

Loss of homeostasis within body cells and organs always reveals itself on the surface of the skin, sometimes in drastic ways. The skin can develop over a 1000 different ailments and conditions. Usually, skin disorders are either viral, bacterial, or some type of yeast infection. Less common, but far more dangerous skin conditions include skin […]

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The Salivary Glands

| December 11, 2013 | 0 Comments
The Salivary Glands

The Salivary Glands Several glands associated with the oral cavity secrete saliva. Saliva: Cleanses the mouth Helps moisten and compact food into a round mass called a bolus Contains enzymes that begin the chemical breakdown¬† of starch Dissolves food chemicals so they can be “tasted” Most saliva is produced by major or extrinsic salivary glands […]

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Homeostasis: positive/ negative feedback mechanisms

| May 18, 2013 | 34 Comments
Homeostasis: positive/ negative feedback mechanisms

If you study biology or medicine, having a solid understanding of homeostasis is extremely important. All living systems are based on maintaining an internal environment and equilibrium. In homeostasis, positive and negative feedback mechanisms balance inputs, outputs, and responses. Most control mechanisms use a negative feedback loop, but some, like childbirth would be considered positive feedback.

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