Move one sodium ion from the inside of cell to outside

Assignment Help Physics

Reference no: EM13680774

Living cells "pump" singly ionized sodium ions, Na+, from the inside of the cell to the outside to maintain a membrane potential V membrane=Vin V out= -71mV It is called pumping because work must be done to move a positive ion from the negative inside of the cell to the positive outside, and it must go on continuously because sodium ions "leak" back during the cell wall by diffusion.

1. How much work should be done to move one sodium ion from the inside of the cell to the outside?

2. At rest, the human body uses energy at the rate of approximately 93W to maintain basic metabolic functions. It has been estimated that 24{\rm \\%} of this energy is used to operate the sodium pumps of the body. Estimate to one important figure the number of sodium ions pumped per second.

Reference no: EM13680774

Questions Cloud

Determine the maximum height reached by the project : A projectile is fired with an initial speed of 36.7m/sat an angle of 42.1 above the horizontal on a long flat firing range. Decide the total time in the air. Decide the speed of the projectile 1.30s after firing. Determine the maximum height reached ..

Difference between voluntary and involuntary manslaughter : Difference between voluntary and involuntary manslaughter

What was the takeoff speed : An athlete executing a long jump leaves the ground at a 30.8 angle and travels 7.62m. What was the takeoff speed? If this speed were increased by just 4.0%, how much longer would the jump be?

What is the dipoles angular velocity : An electric dipole consists of 0.600g spheres charged to ± 2.30nC at the ends of a 9.00cm -long mass less rod. The dipole rotates on a frictionless pivot at its center. The dipole is held perpendicular to a uniform electric field with field strength ..

Move one sodium ion from the inside of cell to outside : Living cells "pump" singly ionized sodium ions, Na+, from the inside of the cell to the outside to maintain a membrane potential V membrane=Vin V out= -71mV It is called pumping because work must be done to move a positive ion from the negative insid..

How long will it take to boil the reactor dry : Through a nuclear accident, 410m3 of emergency cooling water at 23C are injected into a reactor vessel where the reactor core is producing heat at the rate of 200 MW. If the water is allowed to boil at normal atmospheric pressure, how long will it ta..

Estimate where is the heavier child sitting : Two children with masses of 19 and 37 kilogram are sitting on a balanced seesaw. If the lighter child is sitting 3 meter from the center, determine where is the heavier child sitting

Result in part is identical to result for the ring : Consider n equal positively charged particles each of magnitude Q/n placed symmetrically around a circle of radius a. (a) compute the magnitude of the electric field at a point a distance x from the center of the circle and on the line passing during..

Obtain the voltage drop along a copper wire : Obtain the voltage drop along a 30 meter length of household no. 14 copper wire (used in 15 Amp circuits). The wire has a diameter of 1.628 millimeter and carries a 12 Amp current

User Account

All Pages