[ECF] of Na+ = 145 mM, and K+ = 4.6 mM [ICF] of Na+ = 9...

[ECF] of Na⁺ = 145 mM, and K⁺ = 4.6 mM

[ICF] of Na⁺ = 9 mM and K⁺ = 155 mM

How much more permeable (answer will be a whole number followed by the word "times") would the above cell be to potassium than sodium if the measured resting membrane potential was -61 mV?

Identify the analogous hormone in the thyroid axis to ACTH in the adrenal axis.

Identify the protein that clears the 2nd messenger produced by the activation of a beta 1 adrenergic receptor.

Expert Solution

Sydney Mullin answered 1 year ago

2- a) Assume the following concentrations of Na+ and K+ ions: [Na+]o = 120 mM, [Na+]i...

2- a) Assume the following concentrations of Na+ and K+ ions: [Na+]o = 120 mM, [Na+]i = 6 mM, [K+]o = 2 mM, and [K+]i = 150 mM. Assume further that at the peak of the action potential, pK : pNa is 1 : 12. Calculate Vm at the peak of the action potential.(Use Goldman-Hodgkin-Katz equation, disregard Chlorine ion) b) Explain the molecular basis of the neuronal refractory periods. That is discuss both the absolute refractory period and the relative...

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Explain the general mechanism for the simultaneous transport of Na+ and K+ by the Na+/K+ ATPase...

Explain the general mechanism for the simultaneous transport of Na+ and K+ by the Na+/K+ ATPase (aka. Na+/K+ pump) describing: The result of this transport on the concentrations of Na+ and K+ inside and outside of the cell How the binding of Na+ and K+ are related to the conformation changes on the protein We discussed F-type pumps, which can also function in the reverse direction (i.e. ATP synthase). Explain how this protein can function both as a pump and...

Species Outside (mM) Inside (mM) Permeability (m/s) Na+ 440 50 2x10-10 K+ 20 400 2x10-8 Cl-...

Species Outside (mM) Inside (mM) Permeability (m/s) Na+ 440 50 2x10-10 K+ 20 400 2x10-8 Cl- 560 50 4x10-8 The giant squid axon has a diameter of 100μm, a membrane thickness of 7.5nm, and a specific membrane capacity of 1μF/cm2. Draw a schematic of the axon, local charge distributions, and indicate the electric field vector across the membrane at rest. Calculate the magnitude of the electric field across the membrane.

True or False? Movement of Na+and K+through a Na+/K+–pump is a facilitated transport across a membrane...

True or False? Movement of Na+and K+through a Na+/K+–pump is a facilitated transport across a membrane Movement of Na+and K+through a Na+/K+–transporter is an electrogenic antiporter process Movement of Na+and K+through a Na+/K+–transporter is an active transport across a membrane

Primary Active Transporter Na+/K+ ATPase pump. Describe how this pump maintains Na+ and K+ ionic gradients...

Primary Active Transporter Na+/K+ ATPase pump. Describe how this pump maintains Na+ and K+ ionic gradients across the cell membrane. SECONDARY ACTIVE TRANSPORTERS: How do these secondary transporters benefit from the ionic gradients created by primary active transporters? What is the difference between cotransport/countertransport? (Please don't write the answer on a separate page all over the place. I'm new to A&P 1 and I'm still learning, so I need to be explained, rather than shown notes like what I take...

If the radius of a cylindrical resistor is 8.4 mm and its length is 4.6 cm,...

If the radius of a cylindrical resistor is 8.4 mm and its length is 4.6 cm, calculate the power through a cylindrical resistor. Use the following quantities: The magnitude of the current density is 1.4 x105 A/m2, and the resistivity of this resistor is 3.6 x10-5 Ω. m.

Consider the Na+/K+-ATPase to be present in a membrane with the following conditions: Na+ concentration inside,...

Consider the Na+/K+-ATPase to be present in a membrane with the following conditions: Na+ concentration inside, 50mM, outside, 250mM; K+ concentration inside, 70mM, outside, 5 mM; at 298K with the voltage being 50mV lower in the interior. 3Na+(in) + 2K+(out) + ATP + H2O ↔ 3Na+(out) + 2K+(in) + ADP + Pi Calculate the free-energy difference for moving both Na+ and K+ in the observed stoichiometry. A -12 KJ/mol B 12 KJ/mol C 24 kJ/mol D 31 kJ/mol

Which of the following statements about Na+ -K+ pump is incorrect? Select one: A. The Na+...

Which of the following statements about Na+ -K+ pump is incorrect? Select one: A. The Na+ -K+ pump is an antiport that moves the ions against their concertation gradient. B. The Na+ -K+ pump is an example of secondary active transport. C. The Na+ -K+ pumps potassium against its concentration gradient. D. The Na+ -K+ pump moves Na+ out of the cell and K+ inside the cell. E. The Na+ -K+ pumps sodium against its concentration gradient. In general, transport...

Match the stage in the action potential with its voltage Na+ influx K+ outflux Na+ channels...

Match the stage in the action potential with its voltage Na+ influx K+ outflux Na+ channels close Na+/K+ ATPase pump Rest Potential A.-85 mV B.-90 mv to -85 mV C.-55 mv to +30 mV D.+30 mV to -90 mV E.+30 mV

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