Calculate the maximum [glucose]in/[glucose]out ratio that can beachieved by the plasma membrane Na+-Glucose symporter of anepithelial cell when the concentration of Na+ inside the cell is 2mM, the concentration of Na+ outside the cell is 15 mM, themembrane potential is -70 mV (inside is more negative) andtemperature is 298K. Assume that the Na+ ions are moving fromoutside to the inside of the cell.

answers

watching

268

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

mdasfaaruddinshareefLv10

26 Jun 2023

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Elin HesselLv2

28 Sep 2019

Already have an account? Log in

Related questions

Which of the following scenarios likely describes a symporter? (Choose all that apply)

a) This transporter moves both Na and glucose into mammalian cells.

b) This secondary active transporter uses Na to move proline into mammalian cells.

c) This transporter allows K ions to flow down their concentration gradient when the voltage of the membrane changes.

d) This transporter utilizes energy from ATP hydrolysis to move Ca2 into the endoplasmic reticulum.

e) This transporter is responsible for maintaining high [Na ] outside the cell and high [K ] inside the cell.

taupegnu198

Write a paragraph of 3-5 sentences describing 1) whether the statement is correct or incorrect and 2) the reasoning for your answer. Your answer should demonstrate your understanding of the physiological concepts underlying the statement and be professionally written. Assume a cell with the following properties: [Na]out = 120 mM; [Na]in = 12 mM [K]out = 5 mM; [K]in = 125 mM Membrane is permeable only to Na+ and K+ If the plasma membrane of the cell becomes more permeable to Na+, both influx of Na+ into the cell and the Na+ equilibrium potential will increase. if this can please be explained in great detail because I really do not understand. The answer that was posted for this question did not make sense to me why if the inside becomes more negative it depolarizes. I thought that was to make is less negative.

What is the maximum ratio of [I^â]_in to [I^â]_out that could be maintained at equilibrium if the Na⁺ gradient is kept constant (by other transport processes) such that transport of Na⁺ into the cell has a ?G of â30 kJ/mol. Assume the membrane potential is â155 mV (inside negative) and that transport of iodide does not affect the size of the Na⁺ gradient. Perform your calculation at body temperature (37Â°C).

Hint: You will need to balance unfavorable the iodide ion transport against this favorable energy for Na+ transport.