00:01
Okay, we have two questions here.
00:03
Start with number one.
00:05
Which of these foods has the most water by weight? a stick of margarine.
00:11
A tomato, an avocado, or a baked white potato in skin.
00:17
Okay, so what kinds of foods have the most water? generally, fresh fruit and vegetable foods.
00:24
So that rules out the margarine, which is mostly fat, vast majority fat.
00:30
So tomato, avocado or baked potato in skin.
00:33
Which of these has most water? well, of the three, it's going to be the tomato.
00:40
The avocado is fat -based.
00:42
Remember that fats are hydrophobic.
00:45
So in that fatty avocado interior, there's not very much room for water because it's repelled by the fats.
00:52
And the baked potato in skin will have more water than something like margarine, but it still doesn't have as much as a tomato.
01:01
A tomato is turgid with water.
01:03
You slice open a tomato, loads of water comes out, slice open a potato, it's very starchy, less so for the tomato.
01:16
2.
01:17
In the human body, which of these is water involved in? the transport of substances, alcohol digestion, providing energy for cellular activity, or protecting the polyunsaturated fatty acids? from three radical damage...