ar Structure and Function Worksheets 3 Chapter concentration

ar Structure and Function Worksheets 3 Chapter concentration, concentrated acrossanembrane side of the membrane more the in orasubstance lipid of oxygen can The that la the side where it is very smalt molecules. carton dowi Pi Rusia are Like other of a cel membrane. in a moves to an area of lower concentrati from an area higher sides the plasma membrane til its conaemnatiot is the same on both of hilic molecules, charged ions, many other ststanors cannot simply dinave across comes from all with diffusion. The help called is with and relatively large moleculai, such as Difusion and camer proteins. in the membrane known as types of transport proteins, including channelproteins \'here are several proteins in the membrane, This allows water molecules and ions to Channel porei, tiny the tails of the lipid molecules i was through the membrane without coeming into contact with hydrophobic with or molecules and in doing so.dey change shape. As carrier proteins change shape, they carry the or molecules aerossthe membrane. oes 1 Explain why passive transport doesnot requite energy. 2. What is a main difference between diffusion and facilitated diffusion? 3. Describe bow simple diffusion proceeds. What kind of molecules can move across the membrane by simple

Solution

1.A.)

2.A)SIMPLE DIFFUSION:In a solution or gas that has an area of high number of particles and an area of lower number of particles,the particles will diffuse,or move,from an area of higher to the area of lower concentration

Simple diffusion doesn\'t require energy and it happens by random motion,it is defined as movement that occurs by chance because there is no order by which movements of particles shift in a solution or gas

3.A)

Simple diffusion is the net movement of substances across membrane from an area of higher to the area of lower concentration