9. Transport Across Membranes

Which statement best differentiates passive transport from active transport across a cell membrane?

In the context of principles of transmembrane transport, which statement best describes how facilitated diffusion differs from simple diffusion across a cell membrane?

In the principles of transmembrane transport, which molecule is directly required to provide energy for primary active transport across a membrane?

In most cells, which molecule is directly used as the immediate energy source to drive primary active transport across membranes?

In the principles of transmembrane transport, what type of energy is typically required to drive primary active transport across a membrane against an electrochemical gradient?

In the context of principles of transmembrane transport, which set correctly lists the three major types of active transport across cell membranes?

In the context of principles of transmembrane transport, how is facilitated diffusion similar to simple diffusion?

In the context of principles of transmembrane transport, which statement best describes a key difference between simple diffusion and facilitated diffusion across a plasma membrane?

In the context of principles of transmembrane transport, which statement correctly distinguishes facilitated diffusion from active transport?

In the context of principles of transmembrane transport, what best defines secondary active transport?

In the context of principles of transmembrane transport, which statement correctly contrasts facilitated diffusion with active transport?

In the context of transmembrane transport, which statement best distinguishes passive transport from active transport?

In the context of principles of transmembrane transport, how is active transport similar to facilitated diffusion?

In the context of principles of transmembrane transport, which molecule is most directly required to drive primary active transport across a membrane?

Which of the following is a form of active transmembrane transport (requires energy input)?