From Latin flexion, flexion is the action and effect of bending the body or any of its limbs. It is a movement of approximation between parts of the body through the action of the muscles. Muscle flexion makes it possible to bring the forearm closer to the arm, for example. The opposite movement to flexion is extension. In this case, a gap occurs between the bones or parts of the body.
Another example of flexion occurs when we bend over and touch our toes. Since we bend the body in order to touch our feet.
Facilitated diffusion require no energy and travels down the gradient of concentration. On the other hand, active transport takes energy and travels up the gradient of concentration.
Mutations can occur in either cell type. If a gene is altered in a germ cell, the mutation is termed a germinal mutation. Because germ cells give rise to gametes, some gamete s will carry the mutation and it will be passed on to the next generation when the individual successfully mates.
