Hydrophilic (water-loving) or could be called water, it mean attracting water molecules as close as possible, the phospholipid is made up of a head that is polar, and a tail that is non polar or in another words called “hydrophobic” , this means that the head of the phospholipid is attracted to water molecules ( this helps you understand the structure of cell membrane formation). Steriod, a class of lipids, some hormones like cholesterol are made up of steroids. They maintain fluidity of cell membrane. Example: oestrogens
When raisins are placed in water and sit overnight, endosmosis takes place. Water goes into the raisins from the surrounding. Due to this endismosis, the raisins gain water and become larger in volume.
Since raisins absorbed some water, the volume of water from the container decreases.
The placenta, because it carry's all the nutrients from the mother to the baby
Systolic pressure is when the ventricles contract.