Air pressure (inside the lungs) is lowest when lung volume is highest, so the answer is B. when you breathe in your lungs expand, which makes the air molecules spread out, therefore the pressure is lower.
Water or other molecules move down their concentration gradient without any energy.........
difference - simple diffusion uses help of transporting protein in the membrane whereas osmosis uses no help.
<span>The answer is false, as "elements", are singular atomic items, according to the "Table of Elements, each of which have their own unique atomic structure. They may be combined to form other substances or compounds. Elements would be the building block of other compounds.</span>
Sodium bicarbonate and digestive enzymes.
I am not entirely sure, but i think it would be the respiratory system because plants produce oxygen after taking in carbon dioxide, and that is similar to the human respiratory system. I am not completely sure though. hope this helps!
