Steering is simply defined as a mechanism in a vehicle or vessel that makes it possible to steer in different directions. The preferred steering method that will help reduce the possibility of losing control is the push pull method. It is also called hand-to-hand. In this method, each hand remains on its respective wheel side. Whenever you are turning left; your left hand begins by pulling in a downward motion from the 10 o'clock position to the 9 o'clock position. <span />
Answer:
B. Adult flies have emerged from the shells
Explanation:
A pupa is the life stage of some insects undergoing transformation between immature and mature stages. The pupal stage is found only in insects that undergo a complete metamorphosis, with four life stages: egg, larva, pupa, and imagoa, therefore, an empty pupae means the insect has emerged from the pupae by splitting the pupal case and leaving it empty
At the onset of a muscle contraction, the presence of calcium triggers the opening of the Na-K channels in the membrane. Potassium is a calcium inhibitor, so as the potassium flows out of the cell, it eventually reduces the presence of calcium. This causes the closure of the Na-K channel (negative feedback mechanism). In a hypokalemic state, the lack of sufficient K doesn't inhibit the calcium channel, and in turn doesn't properly terminate the muscle contraction at the cellular level.
