The Na+/K+/ATPase is the protein that creates an electrochemical gradient in your cells. It accomplishes this by: (select all that apply) A. Pumping Na+ from inside to outside the cell B. Pumping Na+ from outside to inside the cell C. Pumping K+ from inside to outside the cell D. Pumping K+ from outside to inside the cell
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The Na+/K+/ATPase is the protein that creates an
A. |
Pumping Na+ from inside to outside the cell |
|
B. |
Pumping Na+ from outside to inside the cell |
|
C. |
Pumping K+ from inside to outside the cell |
|
D. |
Pumping K+ from outside to inside the cell |
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- Which of the following is true about cell potential? a. It is the sum of the oxidation and reduction potentials b. It is the average of the oxidation and reduction potentials c. It is the reduction potential multiplied by the oxidation potential. d. It is the difference between the reduction and oxidation potentials.Which type of enzyme regulation is best for the following situations?(a) An enzyme that becomes overactive during a disease(b) An enzyme needed only when there is low blood glucose(c) An enzyme that springs into action when a traumatic injury occurs(d) An enzyme needed only during adolescenceEnergy in ATP is used to power skeletal muscle contraction. This is an example of what type of energy conversion? a. chemical energy to mechanical energy b. light energy to mechanical energy c. chemical energy to light energy d. electrical energy to chemical energy.
- The hydrolysis of ATP drives three types of cellular work. Which of the following is not an example of how to cell uses ATP? * a) The movement of cells. b) The transport of sodium as part of the sodium-potassium pump. c) The breakdown of glucose into smaller molecules. d) Anabolic reactions that build molecules.Cells use primarily two ways of storing potential energy: 1) as concentration gradients and 2) in molecules. A) Explain how energy can be stored in these two forms and how it can be used to do other work. B) Propose an analogy that can explain each of these forms of energy storage using everyday items.Say that a heart muscle cell has low levels of ATP and high levels of ADP, what kind of problems is the cell likely to have? Group of answer choices a. It will not be able to use energy that is extracted from glucose to contract b. It will have too much energy and contract uncontrollably c. It will not be able to build new molecules like enzymes and transporters d. It can use glucose for energy but not fatty acids e. This will not greatly affect the function of the cell
- Cells use two ways of storing potential energy: 1) as concetration gradients and 2) in molecules. A) Explain how energy can be stored in these two forms and how it can be used to do the work. B) Propose an analogy that can explain each these forms of energy storage using everyday items.An enzyme __________ the activation energy required for a chemicalreaction.a. increases b. converts c. lowers d. catalyzesThe energetic equivalent of two molecules of ATP is used to activate an amino acid, yet only one molecule of ATP is used. Explain.
- Which direction does the sodium–potassium pump move ions?A. It moves both sodium and potassium ions into the cell.B. It moves both sodium and potassium ions out of the cell.C. It moves sodium ions into the cell and potassium ions out of the cell.D. It moves sodium ions out of the cell and potassium ions into the cell.Which of the following statements about the sodium-potassium pump is correct? A) Both sodium and potassium move down their concentration gradient across the membrane B) 2 sodium ions are pumped out of the cell against their concentration gradient C) The sodium-potassium pump is a type of cotransport. D) ATP is used as an energy sourceATP is : A) produced in the mitochondria of cells B) produced in the nucleus of cells C) produced outside of the cells D) produced only in response to exercise