It makes sense that cell membranes are made of phospholipids because water cant mix in with lipids, so the phospholipids will be able to effectively block out any unwanted water or chemicals suspended in water outside of the cell.
Sound waves are both compressional and longitudinal, (although we frequently draw them as transverse waves).
Longitudinal waves are where the particles of matter collide into one another, pushing them into the next and then oscillating back. This is how sound travels. This is also why sound can only travel through a medium, it cannot travel through a vacuum, as is shown here:
*brings out a stone shaped letter B and points at it* it's this one
The amount of
Vitamin B6 people need is proportional to protein intake. *Below is an image of vitamin b6 and I take no credit for it, I just found it off google.
Lysozyme is the enzyme in tears
