
	3D Medical Animations Close This information is provided by an independent source. Merck & Co. does not endorse and is not responsible for the accuracy of the content, or for the practices or standards of non-Merck sources. This information provided is not intended to be a substitute for professional medical advice. A licensed healthcare professional should be consulted for diagnosis and treatment of any and all medical conditions. The manufacturer of a product generally has the most complete information about that product. How to use How to use The world's largest library of 3D medical animations developed and copyrighted by Blausen Medical Communications. The Human Atlas figures rotating model, labeled slides, and printable text in addition to animated videos. Shows a video of the selected health topic. Controls play, pause, and restart of the video. Shows a summary of the selected health topic. Controls to scroll the text. Shows a 3 D model of the video. Controls to rotate the model. Shows slides from the video. Controls to change slides.

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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.

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activation (ak″tĭ-va´shәn) the act or process of rendering active.
the transformation of a proenzyme into an active enzyme by the action of a kinase or another enzyme.
the process by which the central nervous system is stimulated into activity through the mediation of the reticular activating system.
the deliberate induction of a pattern of electrical activity in the brain.

allosteric activation increase in enzyme activity by binding of an effector at an allosteric site that affects binding or turnover at the catalytic site.

contact activation initiation of the intrinsic pathway of coagulation through interaction of coagulation factor XII with various electronegative surfaces.

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