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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?

It slows down the rate of diffusion Signup and view all the answers

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

Their charge and polarity Signup and view all the answers

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

2% Signup and view all the answers

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

Unsaturated fatty acids Signup and view all the answers

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

Cholesterol Signup and view all the answers

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

They are nonpolar molecules with no preference for any pole Signup and view all the answers

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

To regulate what enters and leaves the cell Signup and view all the answers