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Ch8MC - 20 Multiple choice questions 1 Phospholipid...

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20 Multiple choice questions 1. Phospholipid molecules in a membrane are arranged with their ____ on the exterior and their ____ on the interior. hydrophobic heads ... hydrophilic tails hydrophilic heads ... hydrophobic tails nonpolar heads ... polar tails hydrophobic tails ... hydrophilic heads hydrophilic tails ... hydrophobic heads 2. In osmosis, water always moves toward the ____ solution: that is, toward the solution with the ____ solute concentration. isotonic ... greater hypertonic ... greater hypertonic ... lesser hypotonic ... greater hypotonic ... lesser 3. The concentration of calcium in a cell is 0.3%. The concentration of calcium in the surrounding fluid is 0.1%. How could the cell obtain more calcium? passive transport diffusion active transport osmosis any of the above 4. The movement of molecules from an area of higher concentration to an area of lower concentration is called _____. diffusion endocytosis phagocytosis active transport osmosis 5. Which statement best describes phagocytosis? Cells use this process to export products such as insulin or thyroxine. A cell engulfs a particle by wrapping pseudopodia around it and packaging it within a vacuole.
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