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What is the energy requirement to transport 2 mol of K+ across the membrane by the Nat-K+ ATPase transporter protein at 37 °C under conditions in which the membrane potential is 70 mV (the inside of the cell is negative relative to the outside) and the ion concentrations are as follows: [K+Joutside = 5 mM [K+Jinside = 140 mM [Na+]outside = 150 mM [Na+Jinside = 10 mM +1.83 kJ +3.66 kJ O-1.83 kJ -3.66 kJ

What is the energy requirement to transport 2 mol of K+ across the membrane by the Nat-K+ ATPase transporter protein at 37 °C under conditions in which the membrane potential is 70 mV (the inside of the cell is negative relative to the outside) and the ion concentrations are as follows: [K+Joutside = 5 mM [K+Jinside = 140 mM [Na+]outside = 150 mM [Na+Jinside = 10 mM +1.83 kJ +3.66 kJ O-1.83 kJ -3.66 kJ

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Energy Requirement for K⁺ Transport Across the Membrane** The Na⁺-K⁺ ATPase transporter protein is responsible for moving ions across cell membranes, maintaining essential concentration gradients. Here, we calculate the energy requirement to transport 2 mol of K⁺ ions given specific conditions. **Given Conditions:** - The transport occurs at 37 °C. - Membrane potential: 70 mV (inside of the cell is negative relative to the outside). **Ion Concentrations:** - \([K^+]_{\text{outside}} = 5 \text{ mM}\) - \([K^+]_{\text{inside}} = 140 \text{ mM}\) - \([Na^+]_{\text{outside}} = 150 \text{ mM}\) - \([Na^+]_{\text{inside}} = 10 \text{ mM}\) **Possible Energy Requirements:** - \(+ 1.83 \text{ kJ}\) - \(+ 3.66 \text{ kJ}\) - \(- 1.83 \text{ kJ}\) - \(- 3.66 \text{ kJ}\) In this scenario, select the correct energy value needed to move the ions using the given concentrations and membrane potential. This calculation is crucial for understanding cellular processes such as nerve impulse transmission and muscle contraction.
Transcribed Image Text:**Energy Requirement for K⁺ Transport Across the Membrane** The Na⁺-K⁺ ATPase transporter protein is responsible for moving ions across cell membranes, maintaining essential concentration gradients. Here, we calculate the energy requirement to transport 2 mol of K⁺ ions given specific conditions. **Given Conditions:** - The transport occurs at 37 °C. - Membrane potential: 70 mV (inside of the cell is negative relative to the outside). **Ion Concentrations:** - \([K^+]_{\text{outside}} = 5 \text{ mM}\) - \([K^+]_{\text{inside}} = 140 \text{ mM}\) - \([Na^+]_{\text{outside}} = 150 \text{ mM}\) - \([Na^+]_{\text{inside}} = 10 \text{ mM}\) **Possible Energy Requirements:** - \(+ 1.83 \text{ kJ}\) - \(+ 3.66 \text{ kJ}\) - \(- 1.83 \text{ kJ}\) - \(- 3.66 \text{ kJ}\) In this scenario, select the correct energy value needed to move the ions using the given concentrations and membrane potential. This calculation is crucial for understanding cellular processes such as nerve impulse transmission and muscle contraction.
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