What kinds of molecules can diffuse easily across the cell membrane ?

The cell membrane's primary characteristics is its particular permeability, which means that it permits some substances to cross it effortlessly, but not others. Small nonpolar molecules,which have no charge, can cross the membrane with ease by means of diffusion, but ions, which are charged molecules as well as larger molecules basically cannot. Moreover, water diffusion is known as osmosis. Oxygen which is a nonpolar and a small molecule, can easily pass through a cell membrane. Carbon dioxide, which is the byproduct of cell respiration, is so small to effortlessly diffuse out of a cell. Furthermore, small and uncharged lipid molecules can pass into the lipid entrails of the membrane.

you are the source of the heat energy. you can minimize the heat energy by selecting the appropriate clothes to wear.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.