Chapter 7: Structure and Function of Plasma Membranes
- Lipids are a diverse group of molecules, what is the one thing that all lipids share in common?
- Chemically, why are lipids hydrophobic?
- What are the three main types of lipids in biological organisms?
- What is the biological function of fats?
- Fats are made of what two molecular components? Which one is hydrophobic?
- What is a glycerol?
- What is a fatty acid?
- Chemically, why is butter a solid at room temperature while oil is a liquid?
- What is the difference between saturated and unsaturated fats?
- Molecularly, which one is more densely packed: saturated or unsaturated fats?
- Chemically, why are saturated fats harder for your body to break down than unsaturated fats?
- What is the difference between monounsaturated fats and polyunsaturated fats?
- What is the difference between cis-unsaturated fats and trans-fats?
- Why are trans-fats so much more difficult to break down than cis-fats?
- Phospholipids have a ______ head and a ______ tail.
- What makes the tail of a phospholipid hydrophobic?
- What makes the head of a phospholipid hydrophilic?
- Phospholipids form what kind of structures in water?
- Draw a Liposome.
- Draw a micelle.
- Draw a phospholipid bilayer.
- What structure do all steroids share? What do they vary by?
- What is the precursor steroid that the body converts into other steroids into?
- Why are steroids important in animal growth and development?
- The cell membrane is selectively permeable. What does that mean?
- Draw a cross section of a cell membrane. What two types of molecules is the cell membrane made of?
- In water, which part of the phospholipids face the water (the outside of the bilayer)?
- What is the difference between passive and active transport?
- Which one uses ATP: passive or active transport?
- Which one goes from a low concentration to a high concentration: passive or active transport?
- Be able to look at a picture of cell transport and tell whether it is: simple diffusion, facilitated diffusion, cotransport, active transport, exocytosis, or endocytosis.
- Osmosis is the _______ of water molecules across a permeable membrane.
- What is the difference between hypertonic, isotonic, and hypotonic?
- If you drink way too much water, what will you be: hypertonic, isotonic, or hypotonic?
- If you eat too much salt, what will you be: hypertonic, isotonic, or hypotonic?
- If you put a liposome filled with pure water into a sucrose solution, will the liposome become hypertonic, isotonic, or hypotonic?
- If you put a liposome filled with a sucrose solution into a pure water solution, will the liposome become hypertonic, isotonic, or hypotonic?
- If you put a liposome filled with pure water into a pure water solution, will the liposome become hypertonic, isotonic, or hypotonic?
- What is the difference between simple diffusion and facilitated diffusion?
- What type of molecules can pass the lipid bilayer via simple diffusion?
- What type of molecule can pass the lipid bilayer only via facilitated diffusion?
- What is the difference between facilitated diffusion and active transport?
- What is the difference between pinocytosis and receptor-mediated endocytosis? Which is more specific (picky)?
- When is the best guess for when the first cell arose on Earth?
- What are three theories about how the first cell came to be?
- What is thought to be the first self-replicating molecule?
- What is the difference between autotrophs and heterotrophs?
- Were the first cells thought to be autotrophs or heterotrophs?
- The simplest self-replicating cell needed a minimum of two components, what are they?