Biophysics | Senioritis

Mohamed Abbas
June 21, 2023
Biophysics

Optimizing Solute Diffusion: Properties Governing Lipid Bilayer Permeability

Review the properties that govern the rate at which a given solute can cross a protein-free lipid bilayer. depends on size + solubility: small, non polar, hydrophobic...

Mohamed Abbas
June 21, 2023
Biophysics

Differences between Membrane Transport Proteins: Transporters vs. Channels

State the function of membrane transport proteins and differentiate between transporters and channels. transporter: transfer molecules or ions that fit. Specificity Channel: passageway for certain hydrophilic molecules...

Mohamed Abbas
June 21, 2023
Biophysics

Importance of Ion Concentration in Cellular Physiology

Indicate how the concentration of ions in the cell differs from that outside the cell. Intracelluar:Na+: 15 mMK+= 150 mMCl-= 7 mMExtracellular:Na+=145 mMK+= 5mMCl-= 100 The concentration...

Mohamed Abbas
June 21, 2023
Biophysics

The Vital Role of Resting Membrane Potential in Neural and Muscle Function: Explained

Define ‘resting membrane potential.’ Membrane potential at which membrane is at rest. (no action potential) Resting membrane potential refers to the electrical potential difference that exists across...

Mohamed Abbas
June 21, 2023
Biophysics

Transporters vs Channels: Differences in Solute Transport through Biological Membranes.

Compare how transporters and channels discriminate among solutes, moving only a select subset across the membrane. Channels open for certain sizes Transport bind so they are more...

Mohamed Abbas
June 21, 2023
Biophysics

Differences Between Active and Passive Membrane Transport Mechanisms

Distinguish between active and passive transport, and indicate which type of membrane transport protein carries out each. Passive: no energy used; channel or transporterActive: energy of ATP...

Mohamed Abbas
June 21, 2023
Biophysics

Passive Transport: Forces Governing the Movement of Solutes Across a Cell Membrane

Review the forces that govern the passive transport of charged and uncharged solutes across a cell membrane. uncharged solutes: concentration gradient Charged solutes: concentration gradient and the...

Mohamed Abbas
June 21, 2023
Biophysics

Electrochemical Gradient of Sodium and Potassium Ions in Cells

Compare the electrochemical gradients for sodium and potassium ions, and recall how the membrane potential and concentration gradient for each ion combine to influence its movement across...