What type of transport can move big molecules across the cellular membrane? What does the cell membrane keep out? When molecules use facilitated diffusion, what kind of protein will they need to help them move molecules across the membrane? What is the hydrophobic part of the cell membr...
What is a membrane that allows only certain things to pass through called? What is the plasma membrane and its structure? Fill in the blank. Diffusion across a biological membrane is called ___. During osmosis, which molecules move and through which type of membrane? What type of...
Organelles are elements inside a cell that possess a double plasma membrane like the one surrounding the cell as a whole. The more notoriousmembrane-bound organellesinclude: **Nucleus:** This contains the cell's DNA. The nucleus is often excluded from discussions of "organelles" because of its...
How can materials exit a cell by active transport? What stores material within the cell? What type of transport can move big molecules across the cellular membrane? A substance moves by facilitated diffusion into a cell. What is required for its transport? What components are or can be present...
Pigment molecules are associated with proteins, which allow them the flexibility to move toward light and toward one another. A large collection of 100 to 5,000 pigment molecules constitutes an "antenna," according to an article byWim Vermaas, a professor at Arizona State University. These struc...
2.2. Transport of hydrosoluble molecules through the skin Despite the complex structure of the skin, Fick's law appears suitable to describe the transport through this type of physiological membrane (Eq. (1)):(1)J=ADΔChwhere J is the drug flux through the skin, A is the area of the ...
When I took biology I was totally fascinated by the plasma membrane. It really is integral to the cells functioning because of the way it allows some things, but not others, to pass through the membrane. There are also membranes inside the cell. In fact, the compartmentalization inside the ...
Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration whereas osmosis is the movement of a solvent such as water from an area of low solute concentration to an area of high concentration o...
All cells are surrounded by plasma membranes. (a) True (b) False. Cell membranes are made up of what lipid? What molecules can diffuse through the plasma membrane? True or false? All living cells have plasma (cell) membranes. Why is a cell membrane made up of a bilayer?
Water molecules can possibly have a hard time getting through the plasma membrane. Why? What molecule is thought to facilitate the movement of water molecules through a plasma membrane? What property of the phospholipid bilayer allows proteins to move laterally in the membrane?