Answered: Simple diffusion across membranes is…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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1. Simple diffusion across membranes is faster for which type of molecules? a)Lipophilic substances b)Hydrophilic substances c)Amphipathic substances d)Polar molecules 2. One of the following is true of active transport? a)Substances diffuses following its concentration gradient b)Substances passively diffuse against its concentration gradient c)Energy is used to transport substances against its concentration gradient d)The movement of an ion down its electrochemical gradient is coupled with transport of another molecule against its concentration gradient 3. What happens to the volume of a red blood cell that is placed in a hypertonic solution. a)It shrinks b)volume does not change c)Volume increases 4. What was the effect of excessive water consumption on the osmolarity? a)It decreased b) It increased 5. A protein that is in a secondary structure has one of the following characteristics a)Amino acids of a single peptide chain are bound to each other by five different types of bonds into a new three-dimensional structure. b)It forms a single straight line of amino acids c)It chain of amino acids is folded into an alpha helix d)Several proteins are bound together in a multimeric functional protein

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