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.
When blood flow is cut off, eye structures can't get oxygen and nutrients, and vision loss results. The condition may be preceded by episodes of vision loss known as amaurosis fugax. The cause of CRAO is most commonly a clot or embolus from the neck (carotid) artery or the heart. This clot blocks blood flow to the retina. CRAO is considered a stroke of the eye.