Ch. 11 - Biological Membranes and Transport WorksheetSee all chapters
All Chapters
Ch. 1 - Introduction to Biochemistry
Ch. 2 - Water
Ch. 3 - Amino Acids
Ch. 4 - Protein Structure
Ch. 5 - Protein Techniques
Ch. 6 - Enzymes and Enzyme Kinetics
Ch. 7 - Enzyme Inhibition and Regulation
Ch. 8 - Protein Function
Ch. 9 - Carbohydrates
Ch. 10 - Lipids
Ch. 11 - Biological Membranes and Transport
Ch. 12 - Biosignaling
Clutch Review 1: Nucleic Acids, Lipids, & Membranes
Clutch Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Clutch Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism
Clutch Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Sections
Biological Membrane Transport
Passive vs. Active Transport
Passive Membrane Transport
Facilitated Diffusion
Erythrocyte Facilitated Transporter Models
Membrane Transport of Ions
Primary Active Membrane Transport
Sodium-Potassium Ion Pump
SERCA: Calcium Ion Pump
ABC Transporters
Secondary Active Membrane Transport
Glucose Active Symporter Model
Endocytosis & Exocytosis
Neurotransmitter Release
Summary of Membrane Transport
Thermodynamics of Membrane Diffusion: Uncharged Molecule
Thermodynamics of Membrane Diffusion: Charged Ion

Concept #1: Thermodynamics of Membrane Diffusion: Uncharged Molecule

Example #1: ΔGtransport for Membrane Diffusion of Uncharged Solutes.

Practice: Calculate ΔGtransport for the diffusion of glucose from outside to inside a cell if extracellular [Glucose] = 5 mM, intacellular [Glucose] = 0.5 mM, & the temperature = 20˚C. Would this be an exergonic or endergonic process?

Practice: Calculate ΔGtransport for the diffusion of glucose from inside to outside a cell if extracellular [Glucose] = 1 M, intacellular [Glucose] = 2.0 mM, & the temperature = 20˚C. Would this be a spontaneous or nonspontaneous process?

Practice: Calculate the energy cost (ΔGtransport) of pumping an uncharged solute across a cell’s plasma membrane, against a 1.0 x 104-fold concentration gradient at 25˚C. Would this be an exergonic or endergonic process?