Grant Sanders


(1) p. 31 Describe the structure of a phospholipid (insert an image). Indicate the parts that hydrophillic and the parts that are hydrophobic. Phospholipids are like fats, but a polar phosphate group replaces one fatty acid.
(2) p. 31 How do phospholipids arrange themselves in water? They arrange themselves where the head is polar and the tail is nonpolar.

(3) p. 46 Describe the fluid-mosaic model of a membrane. (insert an image) Which components are the fluid, and why? Which components are the mosaic, and why?
(4) p. 46 What is the function of the membrane? How does the structure of the membrane suit that structure?
The function of the membrane is to keep the cell alive. The structure has an outer membrane that protects the cell keeping it alive.
(5) p. 46 Why is the membrane considered selectively permeable?
It allows only certain molecules and ions to enter and exit the cytoplasm freely; therefore, the plasma membrane is said to be selectively permeable.
(6) p. 46 What is diffusion? Give an example.
Diffusion is the random movement of molecules for the area of higher concentration to the area of lower concentration, until they are equally distributed. Chocolate chip cookies smell everywhere in the house up when they are concentrated, and when they are distributed the smell reaches the nose, but the smell is still moving throughout the house.
(7) p. 46 What is osmosis?
Osmosis is the diffusion of water across the plasma membrane.
(8) p.46 How do isotonic, hyptonic, and hypertonic solutions differ and how does each affect cells? (insert an image)
(9) pp. 46-47 What is the difference between passive and active transport?
Passive transport
(10) pp. 46-47 What are the various ways substances can enter and exit cells? (diffusion, facilitated transport, active transport, endocytosis, exocytosis) Which are passive and which are active ways of crossing the cell?
(11) p. 47 What is the difference between exocytosis and phagocytosis?
(12) p. 54 What is the overall formula of cellular respiration? What are the reactants and what are the products?
(13) pp. 54-55 Which molecule captures the energy released from glucose? How many molecules are produced per glucose?
(14) p. 55 What is the role of oxygen in cellular respiration?
(15) p. 55 Where does carbon dioxide come from in cellular respiration?
(16) p. 56 What is fermentation? How many ATP are produced per glucose molecule?
(17) p.56 What is the waste product of yeast fermentation?