<span>Because the left ventricle has a stronger muscular wall than the right ventricle?</span>
To complete the statement above:
Ions are transported across membranes using channel-mediated facilitated diffusion; which requires <span>kinetic energy.
The channels can be opened by the requirements of the cell. Transmembrane proteins, called transporters, utilize the vitality of ATP to drive particles or little atoms through the layer against their focus angle.
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I believe they were the spleen and thymus.
A blue line indicates that there is water running through the valley. If there is not a blue line the V pattern indicates which way water flows.