Answer:
b. atom is the basic unit of matter
Explanation:
The answer is fat embolism. A fat embolism is an embolus completed up of fatty acids which is basically it is a splotch of fat that gets into the bloodstream and stuck in a blood vessel. This illness is hard to make a diagnosis and is mutual subsequent a major injury or trauma.
The type of macromolecule that can move polar substances across membranes via facilitated diffusion and/or active transport are the lipids. This group of macromolecule would belong to the family of organic substance which would include waxes, cholesterol, vegetable oils and fats. Facilitated diffusion is a process wherein there is a spontaneous transport of molecules across a membrane. It happens in almost all of the cells. Lipids would undergo this diffusion across a phospholipid bilayer by the carrier proteins. Since the bilayer contains lipids then only molecules that are soluble in lipid can pass the membrane. <span>Most likely these are small </span>polar<span> uncharged </span>molecules.