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3. Label each diagram in Model 2 with the ion or molecule type (i.e., large/small, polar/nonpolar/charged) based on the information (including the symbols) in Model 1. 4. Assume the substances in Model 2 were on only one side of the membrane to start. The diagrams illustrate what would happen after some time has passed. Which substances appear to be completely blocked by the membrane? а. b. Which substances appear to be able to pass freely through the membrane? Which substances appear to pass through the membrane with some difficulty? С. d. Urea appears to pass through the membrane more easily than glucose. What characteristic of urea might help explain this observation?

3. Label each diagram in Model 2 with the ion or molecule type (i.e., large/small, polar/nonpolar/charged) based on the information (including the symbols) in Model 1. 4. Assume the substances in Model 2 were on only one side of the membrane to start. The diagrams illustrate what would happen after some time has passed. Which substances appear to be completely blocked by the membrane? а. b. Which substances appear to be able to pass freely through the membrane? Which substances appear to pass through the membrane with some difficulty? С. d. Urea appears to pass through the membrane more easily than glucose. What characteristic of urea might help explain this observation?

Human Anatomy & Physiology (11th Edition)
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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2. D00 F4 F5 DD qE Model 2 - Selectively Permeable Cell Membrane and Simple s lock Diffusion Extracellular Fluid m Cytoplasmic Fluid wwwww w Extracellular Fluid mwwwy Cytoplasmic Fluid wwwmww www www wwmww wwwmwy www wwwwm wwww.w www wwwwm wwwwY www wwOCytoplasmic Fluid Extracellular Fluid Extracellular Fluid Cytoplasmic Fluid ww ww www w wwm m www ww wwwww と wwww wwww The four diagrams in Model 2 illustrate movement of four types of substances (see the table in Model 1 - the symbols in this model correspond with those from the previous model) across a phospholipid bilayer (extracellular fluid on left and cytoplasmic fluid on right). 3. Label each diagram in Model 2 with the ion or molecule type (i.e., large/small, polar/nonpolar/charged) based on the information (including the symbols) in Model 1. 4. Assume the substances in Model 2 were on only one side of the membrane to start. The diagrams illustrate what would happen after some time has passed. Which substances appear to be completely blocked by the membrane? a. b. Which substances appear to be able to pass freely through the membrane? C. Which substances appear to pass through the membrane with some difficulty? d. Urea appears to pass through the membrane more easily than glucose. What characteristic of urea might help explain this observation? Diffusion is the process of molecules traveling across a membrane barrier from a location of high concentration to a location of low concentration ("down their concentration gradient"). The driving force for this process is simply the natural movement of the molecules in random directions. Whether the molecules are allowed to cross or not is due to the polarity of the molecules themselves and their size. No energy is needed during simple diffusion, so it is considered a type of passive transport. This Does the above description match with what we’ve discussed in lecture? process is illustrated in Model 2 for several types of molecules.
Transcribed Image Text:2. D00 F4 F5 DD qE Model 2 - Selectively Permeable Cell Membrane and Simple s lock Diffusion Extracellular Fluid m Cytoplasmic Fluid wwwww w Extracellular Fluid mwwwy Cytoplasmic Fluid wwwmww www www wwmww wwwmwy www wwwwm wwww.w www wwwwm wwwwY www wwOCytoplasmic Fluid Extracellular Fluid Extracellular Fluid Cytoplasmic Fluid ww ww www w wwm m www ww wwwww と wwww wwww The four diagrams in Model 2 illustrate movement of four types of substances (see the table in Model 1 - the symbols in this model correspond with those from the previous model) across a phospholipid bilayer (extracellular fluid on left and cytoplasmic fluid on right). 3. Label each diagram in Model 2 with the ion or molecule type (i.e., large/small, polar/nonpolar/charged) based on the information (including the symbols) in Model 1. 4. Assume the substances in Model 2 were on only one side of the membrane to start. The diagrams illustrate what would happen after some time has passed. Which substances appear to be completely blocked by the membrane? a. b. Which substances appear to be able to pass freely through the membrane? C. Which substances appear to pass through the membrane with some difficulty? d. Urea appears to pass through the membrane more easily than glucose. What characteristic of urea might help explain this observation? Diffusion is the process of molecules traveling across a membrane barrier from a location of high concentration to a location of low concentration ("down their concentration gradient"). The driving force for this process is simply the natural movement of the molecules in random directions. Whether the molecules are allowed to cross or not is due to the polarity of the molecules themselves and their size. No energy is needed during simple diffusion, so it is considered a type of passive transport. This Does the above description match with what we’ve discussed in lecture? process is illustrated in Model 2 for several types of molecules.
Type 1 Ions Type 2 Molecules Type 3 Molecules Type 4 Molecules Glucose: Molecular oxygen (0,): Potassium: K+ Water: O- H. Sodium: Na+ +, H Urea: Carbon dioxide (CO,): H. OH H Calcium: Ca2+ 0=C=0 OH OH C. Chloride: CI e H2N NH2 H. Polar polar folar Small nonpolar small large Small
Transcribed Image Text:Type 1 Ions Type 2 Molecules Type 3 Molecules Type 4 Molecules Glucose: Molecular oxygen (0,): Potassium: K+ Water: O- H. Sodium: Na+ +, H Urea: Carbon dioxide (CO,): H. OH H Calcium: Ca2+ 0=C=0 OH OH C. Chloride: CI e H2N NH2 H. Polar polar folar Small nonpolar small large Small
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