How do potassium ions travel as they move into the cell?A.Up the concentration gradient and up the membrane potentialB.Down the concentration gradient and up the membrane potentialC.Up the concentration gradient and down the membrane potentialD.Down the concentration gradient and down the membrane potential Ans: C

Q: When the membrane voltage shifts from the RMP to a more negative voltage; this is a_

A:

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: Why do voltage-gated sodium channels have three states (open, closed, refractory/open-block)? Select…

A: The refractory period is the time during which a second action potential cannot be initiated &…

Q: Why do elevations of K in the blood have serious physiological consequences despite the blood-brain…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The movement of sodim and potassium ions is an important part of how a neuron generates an action…

A: Action Potential Generation: The depolarization phase of an action potential is dependent on the…

Q: Hyperkalemia was discussed at length in this module.  If a cell is experiencing hyperkalemia, what…

A: Question-  Hyperkalemia was discussed at length in this module.  If a cell is experiencing…

Q: Which statement best describes the interaction that occurs as a result of the bindi ligand to a…

A: Option- B

Q: Potassium flows the cell through leak channels, its gradient. into, down out of , up into , up out…

A: Generation of nerve impulse in nerve  fibre depends on distribution of sodium and potassium in and…

Q: Place the events involved in generating an action potential in the order in which they occur: 1. K…

A: Nervous system is a type of body system which is involved in control , coordination and transmission…

Q: Use what you know about the physiology of neurons to answer the following questions. Treat questions…

A: Resting membrane potential is a state in which normally the neuron remains in, when there is no…

Q: What do neurons use to expel sodium into the extracellular space in order to maintain a strong…

A: Neurons are the basic unit of the brain. They are cell that passes information. Neurons cells are…

Q: a. If one reduced the extracellular concentration of Na+ around a neuron, what would happen to the…

A: All cells have an electrical potential difference or membrane potential across their plasma…

Q: Which of the following is the correct statement regarding ion channels?   Physical deformation of…

A: Ion channels, integral membrane proteins, facilitate the passage of ions through pore formations.…

Q: The interior of a neuron's plasma membrane at resting membrane potential will have a positive charge…

A: Membrane potential is also more commonly known as membrane voltage or transmembrane potential. It is…

Q: explain the difference between a ligand gated and voltage gated ion channel

A: Cell signaling begins with the interception of a signal or stimulus by a receptor molecule. The…

Q: - For the resting membrane potential: a- The inside is negative in comparison with the outside. b-…

A: Resting membrane potential is the voltage across the plasma membrane before the actual action…

Q: Which ion channels are controlled by change in membrane potential?     Voltage-gated channels…

A: Membrane potential can be defined as the concentration of ions across the plasma membrane and their…

Q: At rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron…

A: The nervous system is highly complex among different organ systems in animals. By transmitting…

Q: :

A: Introduction: Action potential takes place when the membrane potential of a cell rises and falls…

Q: The membrane potential across a cell membrane can be thought of as a "blend" or weighted average of…

A: The membrane potential can be described as a potential gradient that enables the unidirectional flow…

Q: On the graph above, when do the sodium ion channels close? Select one: a. between 0.2 ms and 0.5 ms,…

A: When the stimulus is provided, the Sodium ion VGIC's (Voltage-gated ion channel) move from resting…

Q: Explain what is going on at sites A, B, C, D, F and G in relation to CHARGE (negative, positive,…

A: Action potentials are electrical impulses that neurons use to interact with one another. The…

Q: What enables action potential to jump from one node of Ranvier to the next? OA. Increased LC OB.…

A: Nodes of Ranvier are points in the axon where myelin sheath is absent and hence conductance is…

Q: Which image represents depolarizing graded potential?

A: The depolarizing graded potential is most commonly seen due to the influx of Na+ and Ca+ ions into…

Q: Fill in the blank:  As a result of an additive phenomenon called _______________________, the…

A: An action potential can be defined as a quick rise and a subsequent decrease in voltage or membrane…

Q: The negatively charged intracellular environment and resulting resting membrane potential of neurons…

A: INTRODUCTION The intracellular proteins are large and negatively charged. They present inside the…

Q: The patient's muscle weakness, dizziness, and nausea are all due to hypokalemia. How does…

A: When the serum potassium level decreases from the normal value then it arises a condition to define…

Q: Fill in the diagram, your illustration should demonstrate for each phase of the AP: 1. The relative…

A: Action potential (AP) occurs when membrane potential on a specific location of a cell rapidly rises…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.