The Assisted Transport of a Molecule Across the Cell Membrane

question 5

Multiple Choice

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?

• A) diffusion
• B) facilitated transport
• C) active transport
• D) osmosis
• E) crenation

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Definitions:

Sodium Ions

Positively charged particles (cations) of sodium, essential for various bodily functions including nerve impulse transmission and muscle contraction.

Ion Channel-linked Receptor

A type of membrane receptor that directly controls the opening of an ion channel upon activation, leading to changes in cell polarization.

Barbiturates

A class of drugs that act as central nervous system depressants, used for their sedative, hypnotic, and anxiolytic properties.

Benzodiazepine Drugs

A class of psychoactive substances that act as central nervous system depressants and are used as sedatives, anxiolytics, muscle relaxants, or anticonvulsants.