Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial...
Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial inner membrane by a Ca2+ uniporter that is driven by the negative potential inside the matrix.
Part A
Assuming a membrane potential across the inner membrane of 179 mV (inside negative), calculate the ratio of the [Ca2+] in the matrix to that in the cytoplasm ([Ca2+]m/[Ca2+]c) that would exist at equilibrium (i.e., ΔG=0).
Part B
Cytoplasmic [Ca2+] is on the order of 10−7M in a healthy cell. Based on your answer in Part A, calculate the [Ca2+] that would exist in the matrix at equilibrium.
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Calcium is an important regulator of the citric acid cycle.
Calcium is transported across the mitochondrial...
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner ...
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner membrane of 177 mV (inside negative), calculate the ratio of the [Ca2 matrix to that in the cytoplasm(Cthat would exist at equilibrium (i.e, AG 0) Express your answer using two significant figures. in the ReviewI Constants Periodic Table Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial inner membrane by the negative potential inside the matrix....
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across...
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across the mitochondrial membrane. If the mitochondrion has a membrane potential of –150 mV relative to the cytoplasm, and the cytoplasmic concentration of Ca2+ is 1 μM, what is the mitochondrial Ca2+ concentration? Assume a temperature of 37 C. (2) The membrane calcium pump of the malarial parasite Trypanosoma cruzipumps out calcium ions from the parasite cell interior, hydrolyzing one molecule of ATP...
8. The movement of protons out of the mitochondrial matrix establishes an electrochemical H gradient across...
8. The movement of protons out of the mitochondrial matrix establishes an electrochemical H gradient across the inner mitochondrial membrane. The electrochemical potential of this gradient is harnessed to synthesize ATP. This is known as the (A) Hydrophobic effect IqChemiosmotic theory (B) Acid catalysis (0) Michaelis-Menten mechanism _9. Which of the following statements about mitochondria and their lon and metabolite transporters is FALSE? (A) Controlled impermeability of the inner mitochondrial membrane to most ions and metabolites allows for the generation...
1. According to the paper, what does lactate dehydrogenase (LDH) do and what does it allow...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner membrane of 177 mV (inside negative), calculate the ratio of the [Ca2 matrix to that in the cytoplasm(Cthat would exist at equilibrium (i.e, AG 0) Express your answer using two significant figures. in the ReviewI Constants Periodic Table Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial inner membrane by the negative potential inside the matrix....
8. The movement of protons out of the mitochondrial matrix establishes an electrochemical H gradient across the inner mitochondrial membrane. The electrochemical potential of this gradient is harnessed to synthesize ATP. This is known as the (A) Hydrophobic effect IqChemiosmotic theory (B) Acid catalysis (0) Michaelis-Menten mechanism _9. Which of the following statements about mitochondria and their lon and metabolite transporters is FALSE? (A) Controlled impermeability of the inner mitochondrial membrane to most ions and metabolites allows for the generation...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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