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Caracterização de uma enzima mitocondrial: Desidrogenase Succínica

Roteiro de aula prática que tem por objetivo: 1) Demonstrar parcialmente a técnica de isolamento de mitocôndrias. 2) Caracterizar a presença da desidrogenase succínica na fração mitocondrial. 3) Demonstrar a inibição enzimática competitiva.

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Uptake cholesterol enter cells by receptor-mediated endocytosis

LDL is a low-density lipoprotein, very rich in cholesterol and cholesteryl esters, contending one specific apoprotein. The bilding of apoprotein to an LDL receptors initiates process of endocytosis, which conveys the LDL and its receptor into the cell within an endosome. The endosome fuses with a lysosome, which contains enzymes that hydrolyze the cholesteryl esters, releasing cholesterol and fatty acid into the cytosol, and the LDL receptor returned to the cell surface, to function again in LDL uptake.

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Edge effect

Edge effect: periphery areas of forest fragments are more suceptive to external impacts, leading to environment degradation from the outside towards the inside.

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In vitro Fecundation

Schematical representation of the in vitro fecundation process in human beings: It is a resource used in cases of patologias as damnification in the Tubes of Falópio, harming the transport of óvulo, or little production of spermatozoon for the man. After hormonal stimulation, the mature ovule is collected of the ovary and placed in a test tube contend sperm. The fecundation occurs and after a series of cellular divisions, the originated embryo is implanted in the uterus.

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The platelets in the coagulation process

The platelets in the coagulation process A: Unbroken vase. B: Process of injury. C: Platelets adhesion to the wall vase and release of factors of intracellular signalling that promote the vasoconstriction, with the reduction of the blood vessel, and induce the production of other composites that will participate of the coagulation. D: Platelets Aggregation: Change of form of platelets and linking plaqueta/plaqueta. E: Fibrin and blood cell deposition on the platelets drain plug.

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