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Questions and Answers
According to the Nernst equation, what does the Nernst potential account for?
According to the Nernst equation, what does the Nernst potential account for?
- Distribution of ions and concentration gradient
- Flow of ions and resistance of the membrane
- Charge of the particle and ratio of concentrations (correct)
- Diffusional forces and electrical fields
What is the Nernst potential?
What is the Nernst potential?
- The balance between diffusional forces and electrical fields
- The membrane voltage at which a particle moves into and out of the cell at the same rate
- The voltage across a membrane that is permeable to a specific particle (correct)
- The flow of ions and resistance of the membrane
Why is there an unequal distribution of sodium and potassium across the membrane?
Why is there an unequal distribution of sodium and potassium across the membrane?
- Diffusional forces
- Electrical fields
- ATPase (correct)
- Nernst potential
Why is there an unequal distribution of charge across the membrane?
Why is there an unequal distribution of charge across the membrane?
Why is it helpful to understand Nernst potentials?
Why is it helpful to understand Nernst potentials?
Why is the membrane potential of a neuron close to, but not the same, as the equilibrium potential for potassium?
Why is the membrane potential of a neuron close to, but not the same, as the equilibrium potential for potassium?
What does the Goldman Field equation predict?
What does the Goldman Field equation predict?
How many physico-chemical laws are in play in the case of Mary?
How many physico-chemical laws are in play in the case of Mary?
What clinical features are less likely to be due to vascular changes in Mary's case?
What clinical features are less likely to be due to vascular changes in Mary's case?
What is the membrane potential in many neurons?
What is the membrane potential in many neurons?
Which of the following best explains Robert's foot swelling?
Which of the following best explains Robert's foot swelling?
Which of the following best explains Robert's shortness of breath?
Which of the following best explains Robert's shortness of breath?
How does Robert's foot swelling relate to the physicochemical laws discussed in the pre-learning and during the lecture?
How does Robert's foot swelling relate to the physicochemical laws discussed in the pre-learning and during the lecture?
How does Robert's shortness of breath relate to the physicochemical laws discussed in the pre-learning and during the lecture?
How does Robert's shortness of breath relate to the physicochemical laws discussed in the pre-learning and during the lecture?
What is the main problem in heart failure that leads to impaired 'forward-flow'?
What is the main problem in heart failure that leads to impaired 'forward-flow'?
What is the main problem in heart failure that leads to 'fluid backup'?
What is the main problem in heart failure that leads to 'fluid backup'?
What is the effect of decreased cardiac output on important tissues in heart failure?
What is the effect of decreased cardiac output on important tissues in heart failure?
What is the effect of impaired function of tissues with poor blood supply in heart failure?
What is the effect of impaired function of tissues with poor blood supply in heart failure?
What is the effect of blood not moving from veins at its usual rate in heart failure?
What is the effect of blood not moving from veins at its usual rate in heart failure?
What is the cause of Robert's foot swelling?
What is the cause of Robert's foot swelling?
Which law describes the flow of fluid through a capillary?
Which law describes the flow of fluid through a capillary?
Which forces are involved in the filtration through a capillary?
Which forces are involved in the filtration through a capillary?
What is the purpose of a capillary in transporting substances to and from tissues?
What is the purpose of a capillary in transporting substances to and from tissues?
What do Starling forces describe in the context of capillaries?
What do Starling forces describe in the context of capillaries?
What does the variable 'cap' represent in the simplified Starling forces equation?
What does the variable 'cap' represent in the simplified Starling forces equation?
What does the variable 'ISF' represent in the simplified Starling forces equation?
What does the variable 'ISF' represent in the simplified Starling forces equation?
What is the relationship between charged particles and movement across a membrane?
What is the relationship between charged particles and movement across a membrane?
What does the Nernst potential account for?
What does the Nernst potential account for?
What does the Goldman Field equation predict?
What does the Goldman Field equation predict?
What is the relationship between flux and flow?
What is the relationship between flux and flow?
According to Starling forces, which of the following is responsible for transport of water to and from tissues?
According to Starling forces, which of the following is responsible for transport of water to and from tissues?
What is the purpose of a capillary in physiology?
What is the purpose of a capillary in physiology?
Which equation represents the simplified version of Starling forces?
Which equation represents the simplified version of Starling forces?
Which variable represents the 'leakiness' of the capillary wall to water in Starling forces?
Which variable represents the 'leakiness' of the capillary wall to water in Starling forces?
What is the relationship between flux and flow?
What is the relationship between flux and flow?
What does the Nernst potential account for?
What does the Nernst potential account for?
What is the effect of impaired function of tissues with poor blood supply in heart failure?
What is the effect of impaired function of tissues with poor blood supply in heart failure?
Which of the following forces are involved in filtration through a capillary?
Which of the following forces are involved in filtration through a capillary?
Which equation represents Ohm's law?
Which equation represents Ohm's law?
What is the subject of much debate in relation to Starling forces?
What is the subject of much debate in relation to Starling forces?
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