Rotation is the act of raising the nose of an aircraft (by pulling back slightly on the control yoke or stick) during the take-off roll, so that it leaves the runway. Rotation allows for a precise, positive departure from the runway.
Crenation is the loss of water from an animal cell due to osmosis. Lysis is the rupture of the cell wall due to too much water moving into an animal cell due to osmosis. Both â¦crenation and lysis have drastic effects on the animal cell.
Causes of Intrinsic Staining. Intrinsic staining can occur either before the teeth have emerged, while they are still developing, or after they have emerged. Pre-eruptive staining, which occurs while the teeth are developing, is most often caused by medications or by fluoride. The most common causes of pre-eruptive intrinsic staining are excess fluoride intake either by the mother during pregnancy or by the child while the permanent teeth are developing. Tetracycline, an antibiotic, is also a common cause of this type of discoloration. Post-eruptive staining occurs after the teeth have emerged. The most common causes of this kind of intrinsic staining are trauma and extrinsic staining that reaches the inner layers of the teeth through cracks or surface damage. Trauma can create intrinsic discoloration when blood from a damaged pulp fills the small tubes inside the tooth.