Answer:
The log will float on the water because its density is lower than the liquid, so it will stay at the top due to Archimedes' principle.
The single most important factor influencing potassium ion secretion is its concentration in blood plasma.
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What is Plasma?</h3>
This is the liquid portion of the blood and serves as the transport medium for nutrients in the body.
When there is a high concentration in the plasma, it maximizes the concentration gradient which favors its secretion into the urinary fluid.
Read more about Plasma here brainly.com/question/2901507
Yes I think & I Belive it moves across the surface