a) In the absence of K+ leak channels, what would happen to the resting membrane potential of a neuron? Why is this the case? b) Depolarization of the axon membrane opens voltage-gated Na+ channels. By what mechanism does opening of these Na+ channels open other voltage-gated Na+ channels downstream of the action potential? c) Following an action potential, how does the neuron return to its resting membrane potential?

Q: The Na+/K+ pump is important for ________ in neurons. A) the depolarizing phase of the action…

A: Neurons are the basic structures and functional units of the nervous system. The axon or the…

Q: The Structure of the acetylcholine receptor is shown below:   C. What type of channel is the…

A: Introduction The acetylcholine receptor is an integral membrane protein receptor that is activated…

Q: The neuromuscular junction is similar to synapses in the central nervous system in that: (SELECT ALL…

A: The neuromuscular junction is a specialized synapse that connects a motor neuron to a muscle fiber.…

Q: neuron

A: An action potential is triggered by a graded potential that causes the membrane to depolarize until…

Q: which is not true of neurotransmitters?

A: Nervous system:       It is the most complex system in a human body that performs it's functions by…

Q: 1) When threshold (-55 mV) is reached: a) voltage-gated K+ channels immediately open. b) Na+…

A: Step 1 The membrane potential is the transmembrane electric potential difference measured from…

Q: Please answer  3) Which of the following keeps the impulse traveling in one direction down the…

A: The nerve impulse helps in performing the motor and sensory functions of the body. The nerve cells…

Q: Why does neuronal function require the voltage-gated K+ channels to open more slowly than the…

A: Voltage-gated channels are specialized proteins that are essential for the generation and…

Q: exocytosis of GABA.  A. What anatomical part of a pre-synaptic neuron would be affected by this?…

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Q: normally, which of the following will happen after a neurotransmitter binds to its receptor?

A: A neurotransmitter is a signalling chemical released by a neuron and transmitted across a synapse to…

Q: Which one of these is an example of an excitatory postynaptic potential in a typical neuron? a) A…

A: Introduction EPSPs Are Connected With A Transmitter-induced Increase In The Synaptic Membrane's Na+…

Q: myelination of an axon is decreases the speed of actio potential. a) true  b) false

A: The myelinated axon can be compared to an electrical wire (the axon) with protecting material…

Q: saltatory conduction.

A: Saltatory conduction occurs widely in the myelinated nerve fibers of vertebrates. It involves the…

Q: Which statement regarding neurotransmission through myelinated and unmyelinated neurons is true?…

A: Myelin sheath is modified plasma membrane that wraps around nerve axon and acts as insulator. The…

Q: When a neuron is polarized, O a) both positive and negative ions are concentrated inside the neural…

A: The word polarized means that there is a charge difference which is responsible for the occurrence…

Q: Calcium ions a)Help control the membrane threshold voltage. b)Reduce axon permeability to Na+.…

A: sensory input-afferent information travels from the outside environment to brain environment.

Q: After an action potential has been initiated, there are two processes that prevent the membrane from…

A: The generation of action potential is very much important characteristics in nerve cells that is…

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: 12) when K+ voltage-gated channels open, which of the following occurs? a) depolarization  b) both…

A: In that they repolarize activated neurons to their resting state, voltage-gated potassium channels…

Q: 1) What is responsible for returning the cell to its normal resting membrane potential following the…

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Q: 9. A) What are two scaffolding proteins that localize NMDA and AMPA receptors at the post-synaptic…

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Q: c) multipolar neuronsT d) pseudounipolar neurons T hich of the following statements are correct with…

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Q: taw a graph representing the changes in membrane potential across the axonal membrane before,…

A:

Q: conduction velocity in an axon depends on which of the following? a) how much myelin the axon has…

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Q: The normal concentrations for intracellular and extracellular potassium in a neuron are [K+]in = 150…

A: Recall that the Nernst equation for calculating reversal potential is: Eion  = RT/Zf log [Co]/[Ci]…

Q: D) The concentration of this ion and negatively charged proteins is much greater inside the cell…

A: The Neuron's membrane consists of sodium to be present in large quantity in the extracellular part…

Q: After the depolarisation phase of an action potential, the resting potential is restored by ______.

A: Introduction An action potential is defined as a sudden fall or rise in the potential of the…

Q: 1.A poison causes a drastic rise inE value with stimulation of the membrane.Thereafter membrane is…

A: Answers given in below step

Q: What is the role of calcium in neuronal communication at the axon terminal?  What would be prevented…

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Q: A sodium channel in a nerve membrane a)Inactivation gate closes when the membrane reaches ~+30 mV.…

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Q: 13) Draw a graph representing the changes in membrane potential across the axonal membrane before,…

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Q: During extreme dehydration, plasma K* can increase to as high as 10 mM. (A) What would the membrane…

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Q: Place the following events in chronological order from 1-8: Nat enters the cell, and depolarization…

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Q: ) Neurons cannot respond during the absolute refractory period because: a) the concentration…

A: The absolute refractory period starts immediately after the initiation of the action potential and…

Q: In a neuron at rest, there is a difference in the electrical charge across the cell membrane, with…

A: In a cell, the plasma membrane separates the internal environment (cytoplasm) from the external…

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.