HPAT BIOLOGY Exam Answers
HPAT BIOLOGY Exam Answers Explain how exocytosis and endocytosis are similar/different - ANSWER- Similar - both involve movement of materials and are forms of active transport Different - endo: inward movement Exo: outward movement State 1 similarity and 1 difference between active and bulk transport - ANSWER- Similar - both require cellular energy in the form of ATP Difference - active transport uses cell membrane proteins to transport small molecules against the concentration gradient State 1 similarity and 1 difference between simple and facilitated diffusion - ANSWERSimilar - neither requires energy Difference - simple diffusion does not require the use of cell membrane proteins, because the molecules being transported are small, uncharged, and non-polar How would the cell membrane be affected if it lost its cholesterol component - ANSWER- At low temps - it would become too rigid as the phospholipids would pack too closely together At high temps - it would lose its stability and break open and become porous
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