difference between channels and transporters is that O Only channels allow for the passage of solutes against their electrochemical gradient. OTransporters allow for a greater rate of transport across a membrane than channels do. O Only channels allow for the transport of ions. Transporters must undergo a conformational change upon binding to the solute.

During an investigation on membrane transport, a researcher exposed bacterial cells to different concentrations of two different solutes: A and B. The rate of transport of each solute into cells isrepresented in the graphSolute ASolute BSolute ConcentrationWhich of the following best explains the greater rate of transport for solute A than for solute B at higher solute concentrations?A Solute A is being transported by simple diffusion, which does not rely on membrane proteins to control the rate of transportSolute A is being transported by active transport, which uses ATP and has higher rates of transport than passive transportSolute A is being transported by facilitated diffusion, which uses membrane proteins to increase the rate of transportRate of Transport

Which feature is typical of primary active transport?     The transport protein must cross to the correct side of the membrane before the solute can bind to it.     The transport protein is irreversibly phosphorylated as transport takes place.     The transport protein catalyzes the conversion of ADP to ATP.     The solute moves against the concentration gradient.     A concentration gradient provides the energy to move substances against their concentration gradient.

Which of the following statements about ion channels are true? all ion channels are selective for only one species of ion The only way ions can cross the membrane is through the actions of a transporter. ions can flow though the pores of ion channels faster than they can diffuse freely in solution the movement of ions through the pore of an ion channel does not require energy

Passive transport across the membrane mediated by a carrier—     would not be saturated by increasing amount of substance to be transported.     does not require energy (ATP).     can be driven in reverse.     moves the solute through the membrane in the “uphill” direction of their concentration gradient.     is faster than transport mediated by channel proteins.

Which of the following statements is CORRECT in describing the nature of water channels? Group of answer choices It is a channel for the transport of any liquid medium. It is a non-gated channel. It is a channel that can facilitate the transport of sodium ions. It is a channel for active transport.

Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small intestine, however, rapidly move large quantities of glucose from the glucose-rich food into their glucose-poor cytoplasm. Using this information, which transport mechanism is most probably functioning in the intestinal cells? exоcytosis simple diffusion O phagocytosis facilitated diffusion active transport pumps

The net movement of potassium out of a cell (and sodium into a cell) occurs by: secondary active transport simple diffusion facilitated diffusion O primary active transport

Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.

If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal?   Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA         NCX         SERCA