Regarding fluid shifts and dehydration, when ADH secretion increases to regulate sodium balance by means of increased water retention without additional water consumption (i. e., you lost water but retained electrolytes and didn't drink water], the end result is:

increase Na+ levels in ECF compared to the original condition.

Explanation:

The increase in ADH secretion increases to regulate sodium balance. The will be increase sodium levels in ECF compared to original conditions. The is no additional water consumption in the reaction and electrolytes will be retained.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time