What Is the Membrane Conductance of a Cell with a Specific

question 40

Multiple Choice

What is the membrane conductance of a cell with a specific membrane resistance of 1,000  cm² and 50,000  cm²?

• A) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁹ pS/cm². Therefore, the first cell has a larger surface density of open channels.
• B) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². Therefore, the first cell has a smaller surface density of open channels.
• C) The first cell has a specific membrane conductance of 100  10⁷ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². Therefore, the first cell has a larger surface density of open channels.
• D) The first cell has a specific membrane conductance of 1  10⁷ pS/cm², the second cell has a specific membrane conductance of 0.5  10⁷ pS/cm². Therefore, the first cell has a smaller surface density of open channels.
• E) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². These values do not depend on the surface density of open channels.

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Definitions:

Molecule

The smallest unit of a chemical compound that can retain the chemical properties of the compound, consisting of atoms held together by covalent bonds.

Sp Hybridized

An atomic orbital hybridization state where one s orbital and one p orbital combine, forming two degenerate, linearly oriented hybrid orbitals.

Functional Groups

Unique sets of atoms located in molecules that cause the molecules to undergo their characteristic chemical reactions.

Carbon Atom

The fundamental building block of organic molecules, characterized by its ability to form four bonds.