The planned fast depolarizing phase coincides with: *
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- what would be the consequences for the cell is k+ ions did not binds to the Na + / k + pump in the cellIn 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)The electrochemical gradient across the plasma membraneGroup of answer choices is caused by more sodium on the inside of the cell relative to the outside of the cell Contains stored potential energy that can be harvested by the cell is caused solely by the sodium/potassium ATPase is a form of kinetic energy that can be harvested by the cell All of the above
- Movementof water _____________ its concentration gradient is called ________________.a.down; diffusionb.up; diffusionc.down; active transportd.up; osmosise.none of the choices apply.The membrane of most cells, including neurons, contains passive, open, K' leak channels. Given the normal K' concentrations and the resultant concentration gradient, which direction would K' be expected to move (diffuse) through these leak channels? Select one: 1/into the cell 2/out of the cellhttps://www.youtube.com/watch?v=_bPFKDdWlCg&feature=youtu.be – Na/K pump Answer the following question: How does the movement of three positive Na ions out of the cell and two positive K ions into the cell make the inside of the cell negative?
- Which of the following statements concerning ionophoresare true?a. Ionophores form channels through which ions flow.b. They require energy.c. Ions may diffuse in either direction.d. Ionophores may cause voltage gates.e. They transport all ions with equal ease.Using the appropriate osmotic terms (hypertonic, hypotonic, or isotonic) describe what would happen to each organism in the following settings: a. A bunch of carrots are placed soaked a sink of distilled water.What would happen if all of the Na+/K+ pumps in a cell stopped working? One of the other transport proteins will immediately take over The voltage across the membrane will immediately get more negative The voltage across the membrane will immediately get more positive Nothing will change Gradients and voltage across the membrane will slowly run down All of the above
- Which of the following molecules can bind to and open at least one type of Kir channel? ATP PIP2 EDTA All of the aboveWhich of the following is always at the same concentration inside and outside the cell? a. potassium ions b. water c. hydrogen ions d. glucose e. sodium ionsI cannot seem to understand this: In the set-up shown in the figure below, which of the following statements describe what would be observed after 12 hours of time have elapsed? The level of the solution in the tube would rise The level of the solution in the beaker would rise The level of the solution would not change as the membrane prohibits any exchange between tube and the beaker. The level of the solution in the tube would lower