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The cause of presbycusis is a combination of genetics, cumulative environmental exposures and pathophysiological changes related to aging. [2] At present there are no preventive measures known; treatment is by hearing aid or surgical implant.
Morphogenesis (from the Greek morphê shape and genesis creation, literally "the generation of form") is the biological process that causes a cell, tissue or organism to develop its shape. It is one of three fundamental aspects of developmental biology along with the control of tissue growth and patterning of cellular differentiation.
Bleb growth is driven by intracellular pressure (abnormal growth) generated in the cytoplasm when the actin cortex undergoes actomyosin contractions. [5] The disruption of the membrane-actin cortex interactions [4] are dependent on the activity of myosin-ATPase [6] Bleb initiation is affected by three main factors: high intracellular pressure, decreased amounts of cortex-membrane linker ...
In biochemistry, a conformational change is a change in the shape of a macromolecule, often induced by environmental factors. A macromolecule is usually flexible and dynamic. Its shape can change in response to changes in its environment or other factors; each possible shape is called a conformation, and a transition between them is called a ...
Cellular differentiation is the process in which a stem cell changes from one type to a differentiated one. [ 2 ] [ 3 ] Usually, the cell changes to a more specialized type. Differentiation happens multiple times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
Different changes to lipid structure, such as tail saturation, affect the overall shape of the lipid. A change in shape such as the one shown, when disproportionately in higher concentration on one side of the membrane, allows the membrane to curve. Multiple factors influence whether a lipid will exhibit positive or negative curvature.
The common causes for the disease include blood clots, injury, inheritance, ageing, lack of physical activity and obesity. Medical officials suggest compression therapy for diagnosis; the idea ...
Bacterial morphological plasticity refers to changes in the shape and size that bacterial cells undergo when they encounter stressful environments. Although bacteria have evolved complex molecular strategies to maintain their shape, many are able to alter their shape as a survival strategy in response to protist predators, antibiotics, the immune response, and other threats.