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+

In the Nernst equation [V = 62 log10 (Co / Ci)], the term Co represents: cell bio  the intracellular concentration of calcium the extracellular concentration of potassium the extracellular concentration of sodium the intracellular concentration of potassium the membrane potential (in millivolts)

Which of the following describe active transport or is an example of act transport of a substance across a membrane? Choose all correct answer Glucose transport into intestinal epithelial cells Glucose transport into muscle cells Na* ion pumping out and K* ion pumping into the cell Transport requires a mediator Requires input of energy for transport Movement of ligand against the concentration gradient

What process best characterizes Ca2+ movement from the cytosol (low Ca2+ concentration) into the endoplasmic reticulum (high Ca2+ concentration)? O Calcium movement is spontaneous O Calcium movement involves active transport O Calcium movement occurs by facilitated diffusion using a transporter protein O Calcium movement does not require energy O Calcium movement occurs by passive diffusion A

Molecules cannot move naturally through tje selmembrane against its diffusion gradient,but it does.Explain this statement critically using the sodium-potassium pump diagram

The salt concentration in the cytosol of body cells of seawater fish is lower than it is in their environment. This causes the fish to continually lose water. To compensate for this loss, seawater fish continuously ingest water and rely on membrane-bound proteins on their gills for the removal of salt ions back to the environment. Which of the following describes the most likely mechanism of membrane transport used by seawater fish to remove the salt ions? A B с D exocytosis simple diffusion active transport facilitated diffusion

Moves high permeability molecules down a gradient without energy Moves low permeability molecules down a gradient via a protein transporter without the input of energy Moves low permeability molecules against a gradient via a protein transporter using energy of ATP hydrolysis Moves low permeability molecules against a gradient using a concentration gradient of ions [Choose ] [Choose ] [Choose ] [Choose ] > >

What is active transport? DESCRIBE the function of Na+/K+ ATPase

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.

There are differences in Na+, K+, and Cl- ion concentrations across the membrane.  Knowing that ions like to flow down their respective concentration gradients explain how the movement of Cl- and K+ ions can result in membrane hyperpolarization.