Different types of peanuts. Not every peanut is the same! There are thousands of different types of peanuts, these are known as different cultivars. We can distinguish four popular different types of peanuts: the Runner peanut, the Virginia peanut, the Valencia peanut and the Spanish peanut. All these peanuts differ in size, color, flavor and oil content and are often used for very different purposes.
For a signal molecule to bind with an intracellular receptor it must be able to pass through the cellular membrane. Generally signal molecules that enter the cell are nonpolar and fat soluble. These signal molecules can pass through the lipid bilayer of the cell membrane.
Membrane potential (also transmembrane potential or membrane voltage) is the difference in electric potential between the interior and the exterior of a biological cell. With respect to the exterior of the cell, typical values of membrane potential range from â40 mV to â80 mV. All animal cells are surrounded by a membrane composed of a lipid bilayer with proteins embedded in it. The membrane serves as both an insulator and a diffusion barrier to the movement of ions.