Model 4 - Transport Proteins: Facilitated Diffusion Extracellular Fluid wwwwwwy Cytoplasmic Fluid Extracellular Fluid ( Cytoplasmic Fluid wwwwwwy mmmml pwwwy www.wmy hum www www O mm immmml hmmml muw Cytoplasmic Fluid Extracellular Fluid < mmmm 10. What appears to be the effect of inserting a protein channel into the membrane on the

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Model 4 - Transport Proteins: Facilitated Diffusion
Extracellular Fluid mu Cytoplasmic Fluid
Extracellular Fluid
wwwwwwy
hmmmml Cytoplasmic Fluid
www.wmy
wwwwwy
hummu
hmm
wwwwwwy
immmml
wwwwwwwwY
immu
hmmmml
wwwwy
hmmmm
O
wwwwwwy
wwwwwwwy
imm
hmmmmm
Y
www
Y
www
10. What appears to be the effect of inserting a protein channel into the membrane on the
movement of molecules across the membrane?
11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar
in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the
phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning.
When a membrane protein assists in the passive transport of molecules across a barrier in the
direction down their concentration gradient (from high concentration to low concentration) it is
called facilitated diffusion. Transport proteins may also be involved in active transport where the
cell uses energy from ATP to move molecules across a membrane against or up their concentration
gradient.
Extracellular Fluid w
<
Cytoplasmic Fluid
x
Transcribed Image Text:Model 4 - Transport Proteins: Facilitated Diffusion Extracellular Fluid mu Cytoplasmic Fluid Extracellular Fluid wwwwwwy hmmmml Cytoplasmic Fluid www.wmy wwwwwy hummu hmm wwwwwwy immmml wwwwwwwwY immu hmmmml wwwwy hmmmm O wwwwwwy wwwwwwwy imm hmmmmm Y www Y www 10. What appears to be the effect of inserting a protein channel into the membrane on the movement of molecules across the membrane? 11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning. When a membrane protein assists in the passive transport of molecules across a barrier in the direction down their concentration gradient (from high concentration to low concentration) it is called facilitated diffusion. Transport proteins may also be involved in active transport where the cell uses energy from ATP to move molecules across a membrane against or up their concentration gradient. Extracellular Fluid w < Cytoplasmic Fluid x
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