Consider the following graph of an action potential: 60- 30- membrane potential (mV) O -30- -60 line X -90- What is happening at point "C"? Sodium channels are opening Sodium channels are closing Potassium channels are opening Potassium channels are closing Sodium channels are closing and potassium channels are opening Sodium channels are opening and potassium channels are closing d time I line O

Q: c) Draw a diagram indicating how the ion concentrations will change during the repolarization phase…

A: All cells generate an electrical potential known as membrane potential across the plasma membrane.…

Q: A graded potential that achieves threshold leads to the generation of an action potential. Which one…

A: Graded potentials are made by outside stimuli in sensory neurons or by neurotransmitters discharged…

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: This patient's hypokalemia was due to his profuse sweating the previous day and the subsequent loss…

A: Potassium is a mineral, our body cells need this, it regulates our major body parts functions such…

Q: Which of the following statements regarding action potentials is false? Na+ channel inactivation is…

A: 1. Na+ channel inactivation is due to a voltage-dependent block of the channel pore.This is true.…

Q: Propagation of action potential and transmission mean:   current flow along the cell membrane…

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Q: +30 mV Threshold Potential Resting Potential Time Question: In the abnormal action potential (bottom…

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Q: a) Explain in detail what is occurring at stage A in the graph. (Be specific in terms of what's…

A:

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Q: Based on the graph, how soon could another action potential be easily initiated (at the end of the…

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Q: Draw a typical action potential (correctly label axis) and explain in words the roles of ion…

A: An action potential (AP) occurs when the membrane potential of a particular cell position rises…

Q: A 100-um diameter nerve axon has the following properties: rm = 2.5 x 104 ohm x cm, ri = 1 x 105…

A: The resting Vm is the membrane potential when no current is flowing through the axon. It is the…

Q: At resting membrane potential for a typical neuron (-70 mV), which ion does NOT move? Na+ Ca2+ K+…

A: A resting (non-signaling) neuron has a voltage called the resting membrane potential, or simply the…

Q: Which of the following combinations of spatial summation of postsynaptic potentials (PSP) would…

A: The graded potential achieved by dendrites of a neuron while receiving synapses from other cells is…

Q: Immediately after an action potential has peaked, which of the following channels is most likely to…

A: Channels show passive transport. During passive transport, ions move from high concentration to low…

Q: Put the events for action potential generation in a neuron in the correct order (From 1-9)

A: Action potential generation is a fundamental process in neurons, allowing them to transmit…

Q: The rising phase of the action potential is due to: O Na+ influx through voltage-gated Na+ channels.…

A: Introduction  An electrical signal called an action potential passes briefly over the membrane of a…

Q: The rising phase of the action potential is the direct result of the: O inflow of potassium O inflow…

A: A transient membrane potential reversal known as an action potential occurs when the membrane…

Q: Identify the stages involved during the changes in membrane potential of the neuron represented in…

A: Nervous system is an important system which helps in maintaining the homeostasis of the human body.…

Q: What letter(s) represent the starting point of an action potential?

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: Arrange the events that occur during synapti correct sequence. Use the diagram on the right as a…

A:

Q: A patient is given a drug that blocks the L-Type calcium channel blocker. Which phase of the action…

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Q: Membrane Potential (mV) -70 + 1 3 Time (ms) 1 Na* continues to rush into the cell E Excess…

A: The Na +K + pump is found in cell membrane of neurons as well as in other animal cells. It helps in…

Q: At the peak of an action potential, would the relative permeability of Na be higher than K? Which…

A: Generation of nerve impulse in nerve  fibres depends upon distribution of sodium and potassium in…

Q: Match the stages of action potential with the appropriate image or description.   PICK AND MATCH…

A: Action potential is defined as the rapid depolarization and repolarization of the membrane…

Q: What is the point A on the graph? Define this term. B) What ions are moving at B on the graph, what…

A: Action potential An action potential is defined as the sudden rise and fall in the membrane…

Q: Describe the events that occur during action potential  ANSWER SHOULD INCLUDE: Explanation of how…

A: Action potential is defined as the sudden, fast, propagating change of resting membrane potential…

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Q: ACTION PÔTENTIAL Describe what happens in each phases of action potential and explain the following…

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Q: What is the membrane threshold and describe its role with grade potential's in action potential's

A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…

Q: You find a neuron whose resting potential is -90mV. Which of the following are likely to be true?

A: Neurons are structural and functional units of the nervous system. They are originated from…

Q: Reorder the items below to correctly label the numbers in the diagram. -55 2 Time (msec) | EPSPS,…

A: The signals are transmitted from one neuron to another through neurotransmitters. The…

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.