What are the five ways that the membrane can deal with materials?

five ways in which a membrane can deal with  the materials are:

1. it keeps molecules out  

2.allowing molecules to enter anytime.

3.sometimes it allow molecules at certain  times.

4.hydrophobic molecules can go with ease  because it can dissolve in the lipid bi  layers.

5.large external materials can be taken by  the cell through endoctytosis.

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.