Cell Membrane Physiology

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Questions and Answers

What is the primary source of energy for simple and facilitated diffusion?

  • Electromagnetic energy
  • Thermal energy
  • Kinetic energy (correct)
  • Potential energy

What type of bonding occurs between glycerol and water molecules in the cell membrane?

  • Ion-dipole interactions
  • Hydrophobic bonding
  • Covalent bonding
  • Hydrogen bonding (correct)

What is the reason for the low permeability of large, uncharged polar molecules through the cell membrane?

  • Their ionic interactions
  • Their size and charge
  • Their hydrophobic nature
  • Their polar nature (correct)

What is the effect of a semi-permeable membrane on the rate of diffusion?

<p>It slows down the rate of diffusion (D)</p> Signup and view all the answers

What is the main reason for the impermeability of ions to the cell membrane?

<p>Their charge and polarity (C)</p> Signup and view all the answers

What percentage of the cell membrane is from the plasma membrane in the liver?

<p>2% (D)</p> Signup and view all the answers

What type of fatty acids has a presence of double bonds and is more permeable?

<p>Unsaturated fatty acids (A)</p> Signup and view all the answers

What is the main component of the lipid raft in the phospholipid bilayer?

<p>Cholesterol (B)</p> Signup and view all the answers

What is the function of the hydrophobic molecules in the cell membrane?

<p>They are nonpolar molecules with no preference for any pole (A)</p> Signup and view all the answers

What is the purpose of the phospholipid bilayer in the cell membrane?

<p>To regulate what enters and leaves the cell (B)</p> Signup and view all the answers

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