Which of the following intracellular potentials would have the greatest electrical attraction for Na+ to enter the cell? -70mV -100mV -50mV OmV +20mV

Q: Na+, K+, and Ca2+ curr

A: Driving force refers to the difference between the actual membrane potential and an ion's…

Q: Which of the following is the most important contributor to the difference between the resting…

A: A membrane's voltage varies rapidly in a series known as action potentials.

Q: Depolarization causes: • Changing membrane permeability for Na • Changing membrane permeability for…

A: When an action potential generates a change in electrical potential can be seen and it runs along…

Q: Voltage-gated sodium channels are open and allowing sodium to flow when: O The membrane is at the…

A: When the membrane potential of a particular cell site rapidly increases and decreases, an action…

Q: Which statement does the graph illustrate? Probability of Na channel opening 0.8 0.6 0.4 0.2 0 -80…

A: In membranes, the voltage-gated sodium channels and voltage-gated potassium channels are involved in…

Q: Predict the effect of a reduced extracellular concentration of Na+ on themagnitude of the action…

A: When a membrane's resting potential experiences a sudden, fast, and propagative change, it is…

Q: Which of the following is not an excitatory ligand-gated ion channel? NACHR AMPAR ASIC GABA-AR

A: Neurons send electrical signals by generating and transmitting action potentials. Neurons have…

Q: What do you think would happen to the neuronal action potential if the concentration of sodium ions…

A: An action potential has many different stages; hypopolarization, depolarization, overshoot,…

Q: What determines the activity of the voltage-gated Na1 channel?

A: Cell membrane channels are transmembrane channels. These channels are present in the bilayer of the…

Q: Choose the correct answer: A) When the voltage gated K+ channels open K+ moves down its…

A: Let us discuss each option separately to figure out the correct option out of all. Whenever voltage…

Q: Describe how the magnitude and polarity of the sodium and potassium membrane currents vary with the…

A: The activation of a neuron or muscle fiber is mediated through the modulation of its membrane…

Q: Which ion channel is open at the point beyond O? M N K - -55 -70 Membrane potential (mV)

A: K+ leak channels allow K+ ions to travel out of the cell freely according to the concentration…

Q: Graph an action potential, showing the change inelectrical potential on the y-axis and time on the…

A: Neurons communicate with each other and with the controlled organs by passing an electric current…

Q: Describe the mechanism through which a potassium channel can selectively move K* ions across a…

A: Answer : The awareness gradient and the huge range of K+ ion leak channels permit kt to be inhibited…

Q: What role do the Na+/K+ pumps play in establishing the resting membrane potential?

A: Ans: Na+/K+ pumps: The Na+/K+ pump or ATPase is the electrogenic transmembrane enzymes which is…

Q: Explain the absolute and relative refractory periods in terms of Na+ & K+ gates and conductivities?

A: In humans, various machineries that govern the proper and orderly functioning of the body requires…

Q: How much current actually flows across the membrane over the course of an action potential?

A: Cell to cell communication is an important aspect of all living organisms. It is required for the…

Q: The figure below may help in answering some of the questions. 1. What ions are flowing (and in which…

A: The neurons are the cells of nervous system that is responsible for generation and transmission of…

Q: What structural and functional changes occur in the voltage gated sodium (NaV) channel when it…

A: Action potentials are nerve messages. Neurons produce and convey these signals through their…

Q: If sodium permeability were to increase compared to normal what would be the resulting effect on the…

A: Membrane potential It refers to the difference in the electric potential between the inside and the…

Q: What is the relative importance of the Na+/K+ pump in action potential propagation?

A:

Q: eurons have a resting membrane potential of ___________________.   varying votage as type and…

A: The resting potential is mostly determined by the concentrations of the ions in the fluids on both…

Q: Hyperpolarization is defined as an increase in membrane potential toward zero.

A: Hyperpolarization occurs when the membrane potential becomes more negative at a particular spot on…

Q: What is the driving force (in mV) acting on Sodium flow at the peak of the Action Potential in a…

A: The nervous system of a human being is a complex system that helps to coordinate behavior and to…

Q: What type of transport mechanism is demonstrated by Na+ movement through the open voltage-gated Na+…

A: Voltage-gated sodium channels are one kind of integral protein, mainly they are transmembrane…

Q: How does increasing the intracellular Na+ concentration affect the action potential of a neuron?

A: The action potential is the characteristic increase and decrease of the membrane potential following…

Q: How can the resting membrane potential of a membrane be calculated using the Goldman-Hodgkin-Katz…

A: The Goldman-Hodgkin-Katz equation (GHK equation) is used to calculate the membrane potential of the…

Q: Calculate the driving force for Na+, K+, and Ca2+ current in a neuron under physiological…

A: Driving force refers to the difference between the actual membrane potential and an ion's…

Q: Using the graph, you would need an EPSP of ________mv to get an AP every 6ms.

A: EPSP or excitatory postsynaptic potential is developed by the binding of neurotransmitter with the…

Q: Show a complete circuit diagram of the model of the neuron using the specific numerical values for…

A: Electrical gradient and concentration gradient required at many places in the body for proceed many…

Q: The change of membrane potential from -70mV to -90 mV is hyperpolarization. T/F

A: Introduction: An action potential is explained as the brief sequence of events in the membrane…

Q: What is the equilibrium membrane potential due to Na+ ions if the extracellular concentration of Na+…

A: The fluids present in the internal and external environment of the cell consist presence of several…

Q: If the resting membrane potential of a cell was +70 mV, the ELECTRICAL driving force on sodium would…

A: A neuron's purpose is to turn the message received from the external environment into an electrical…

Q: List the Forces influencing sodium and potassium ions at the resting membrane potential?

A: The voltage across a cell membrane during the resting stage is known as the resting membrane…

Q: Describe the ion movement across the cell membrane during the following stages: resting potential,…

A: Nervous system is a type of body system which helps in transfer of impulse from one part to another…

Q: Explain why alterations in potassium concentrations have more powerful effects on membrane resting…

A: The plasma membrane of almost every cell in the body maintains a resting potential. However the…

Q: Describe the concentration differences for Na+ and K+that exist across the plasma membrane.

A: The plasma membrane is composed of the phospholipid bilayer. The polar heads of the phospholipids…

Q: The ion gradient that most neurotransmitters use to be co-transported into nerve terminals is Ca2+…

A: The neurotransmitter such as acetylcholine use Calcium ion gradient in the nerve terminal. Nerve…

Q: For which cation are there the largest number of leakage channels in the plasma membrane?

A: Ion exchange happens across the plasma membrane through ion channels.

Q: Which ion channel is open at phase K? M N K - -55 -70 Time Voltage-gated ion channel specific to…

A: The graph represents the phases of action potential . Action potential is the change in the membrane…