I cant fully answer, but i know that the phospholipids being amphipathic in nature is important and plays a role in fluidity.
Answer:
Idea models represent the premise of the idea, but the model is just that, it's a simpler form of the idea.
In reality idea can vary on how complex or simple they can be and models are usually made to represent ideas that are too complex to just make or say.
Answer:
cell wall maybe it may be wrong also
Muscle tissue is responsible for both voluntary and involuntary movements.