Six
The percentage of salt in the human body is about 0.9, while the percentage of salt in the ocean is about 3.5.
This percentage is determined by chemical analysis; for some salt mines this percentage is over 99 %.
Between 25 % (for healthy persons) and 50 % (for persons with hypertension). This all depends on what you mean by salt sensitive. We ABSOLUTELY need sodium for our nervous system to work. If a person is sensitive, and by that you mean can't take it in, that person would not survive very long. They would not be able to pass that trait on and it would be practically 0%.
The percentage of salt in human blood is around 0.9.
blood pressure increases as salt intake rises
Make before an experiment; but avoid excess salt, you don't need salt water in the mouth.
The reaction to sodium chloride (this is the sensitivity) is very different in a population.
Iron is very sensitive.
1400
3.5 percent salt and 97.5 is water.
The concentration of salt is very variable: between 5 % and 25 %.
A snail's skin is very sensitive to salt because their body, like ours, is comprised of mostly water. Snails have a hydrostatic skeleton that makes them even more sensitive to salt. Osmosis causes the water inside the snail to diffuse out of the snail when salt is placed on it. These facts lead me to believe that a snail will not try to cross a barrier of salt.