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.
Petechiae tend to occur whenever there is a combination of increased backpressure in the capillaries and deficient blood oxygen (hypoxia). Such a combination occurs during manual (bare hands) strangulation. Neck compression impedes venous return to the heart from the face and head. Airway compromise causes hypoxia. The combination of these events causes ocular capillaries to rupture, forming petechiae. When hypoxia and pressure is extreme, the petechiae become numerous and large, and merge together to form so called confluent petechiae and hemorrhages. Ocular petechiae are seen in other forms of asphyxia as well. Asphyxia is the condition of insufficient supply of oxygen to the tissues.