Q1/Resting membrane potential in the neuron is -70 how could they calculate it? Q2/what is the...

Q1/Resting membrane potential in the neuron is -70 how could they calculate it?

Q2/what is the different between resting potential equilibrium potential for k+(potassium)?

Expert Solution

Q1.

The membrane potential is calculated using the Goldman-Hodgkin-Katz equation:

Here R = Universal Gas Constant

T = Tempeature in Kelvin

F = Faraday Constant

P = Permeability of various ions (sodium, potassium and chloride)

ln = Natural logarithm

RT/F is approximately 26.7 mV at human body temperature (37 °C). After converting ln to log10 , the value of 26.7 becomes 61.5 mV. After the corresponding values of various ion concentration and their permeabilities are substituted, the value of 70 mV can be obtained.

The resting membrane potential can be calculated by determining the permeability of various ions in the cell and substituting them in the above equation. This equation was devised after experimentation on giant squid axons. After all the values are substituted, the value is calculated to be around -70 mV.

Question 2.

A resting (non-signaling) neuron has a voltage across its membrane called the resting membrane potential. It is determined by concentration gradients of ions across the membrane and by membrane permeability to each type of ion. In a resting neuron, there are concentration gradients across the membrane for Na+ and K+.The membrane is much more permeable to K+ than Na+ so the resting potential is close to the equilibrium potential of K+

Sydney Mullin answered 1 year ago

Membrane Potential The resting membrane potential of a neuron is _________. The membrane potential changes when...

Membrane Potential The resting membrane potential of a neuron is _________. The membrane potential changes when _________. A change in membrane potential to a more positive value is called __________ and a change to a more negative value is called _______. Ions flow through _________ which are controlled by voltage and ________ which are controlled by _________. Neurons communicate with other neurons and targets by generating _________. Ghe neuron generates an action potential only if it reaches a threshold voltage...

Describe the resting membrane potential and the forces at play in a resting neuron concisely, but thoroughly

Describe the resting membrane potential and the forces at play in a resting neuron concisely, but thoroughly. At minimum, the following terms/concepts should be explained in your response: membrane potential, ion channels (and the two main ions involved, and their relative distribution), the two types of forces/pressures acting on each of the ions, and the special transporter of these two ions (and what it does). Here is a previous answer I got(it was great!)- please build off it though, and...

Describe the resting membrane potential and the forces at play in a resting neuron concisely, but thoroughly.

Describe the resting membrane potential and the forces at play in a resting neuron concisely, but thoroughly. At minimum, the following terms/concepts should be explained in your response: membrane potential, ion channels (and the two main ions involved, and their relative distribution), the two types of forces/pressures acting on each of the ions, and the special transporter of these two ions (and what it does).

What determines whether a neuron initiates an action potential? Include the role of resting membrane potential,...

What determines whether a neuron initiates an action potential? Include the role of resting membrane potential, threshold, sodium, graded potentials, and the axon hillock. (answer in short answer pragraph form)

When the cell membrane of a neuron is at a resting potential of -65 mV… Select...

When the cell membrane of a neuron is at a resting potential of -65 mV… Select one: A. Na+ ions tend to leak in through Na+ channels down their electrical gradient, but against their concentration gradient B. Na+ ions tend to leak in through Na+ channels down their concentration gradient, but agains their electrical gradient C. K+ ions tend to leak out through K+ channels down their concentration gradient, but against their electrical gradient D. K+ ions tend to leak...

If a cell with a resting membrane potential of -70 mV is treated so that the...

If a cell with a resting membrane potential of -70 mV is treated so that the resting membrane potential is at the equilibrium potential of K+, and then the permeability of the membrane for all ions is returned to normal: why WONT K+ move into the cell across the cell membrane until the resting membrane potential is restored but Na+ will?

Topic 2: Resting membrane potential Describe how a resting membrane potential is established in the wrong....

Topic 2: Resting membrane potential Describe how a resting membrane potential is established in the wrong. and your answer be sure to include A definition of membrane potential The resting membrane potential of neurons What does this value mean What ions are involved in establishing the resting membrane potential? What are the General concentration effects on resting membrane potential? why? The answer should include descriptions of relevant permeabilities, equilibrium potential, and concentration gradients. What is the role of the sodium-potassium...

Which of the following statements is true about the resting membrane potential of a mammalian neuron?

Question 44Which of the following statements is true about the resting membrane potential of a mammalian neuron? The concentration of K+ is greater outside the cell than inside the cell The sodium potassium pump maintain the Na' and K gradient in the resting membrane potential by moving those ions across the plasma membrane with the energy provided by ATP. The inside of the cell is positively charged. The concentration of Na+ is greater inside the cell than outside the cell.The resting membrane potential of...

Neuron Anatomy and Resting Membrane Potential Read the overview and complete the activities that follow. "A...

Neuron Anatomy and Resting Membrane Potential Read the overview and complete the activities that follow. "A multipolar neuron is composed of a cell body, an axon, and hundreds of dendrites. Each neuron receives numerous inputs at the receptive region, which includes both the dendrites and cell body. Neurons send signals down the axon toward the synaptic knob. Resting neurons require a membrane potential in order to send or receive electrical signals. A typical neuronal resting membrane potential is -70 mV,...

Define resting membrane potential and action potential (1 point). Why is the resting membrane potential negative...

Define resting membrane potential and action potential (1 point). Why is the resting membrane potential negative and close to the K+ equilibrium potential when cells are at rest, and then positive and closer to the equilibrium potential of Na+ when activated (4 points).

Question