Local potentials are produced by ligand-gated channels True False

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: A change in the axon membrane potential from -70 mV to -64 mV would be called a depolarization…

A: RESTING MEMBRANE POTENTIAL: The ground value of a trans-membrane voltage that remains static unless…

Q: If the membrane potential at the axon hillock becomes subthreshold, an action potential will be…

A: The region of the neuron from which the axon develops is known as axon hillock, and this region is…

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

A: Action potential  The excitation of neurones by the action of stimulus generates action potential.…

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: 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: Consider the following graph of an action potential: 60- 30- membrane potential (mV) O -30- -60 line…

A: Action potential refers to the sudden rise and fall of membrane potential across a cellular membrane…

Q: Which of the following is one major difference? [Choose ] Only action potentials cause…

A: There is difference in the concentration of ions inside and outside the each cell of body and this…

Q: Which is TRUE about neuronal membrane electrical and concentration gradients at the peak of the…

A: An action potential is sudden and transient changes in the voltage across a biological membrane. It…

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: (II) OI O II O III (IV) On the figure ABOVE, which panel (I, II, III or IV) represents a ligand…

A: Picture a tiny gatekeeper regulating the passage of charged particles such as calcium, potassium,…

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: Threshold is the minimum depolarization needed to________ Repolarize the membrane Open voltage-gated…

A: Neurons are the structural and functional unit of the nervous system that have the capability to…

Q: A ________ potentail is a local, graded depolarization in a receptor cell triggered by the threshold…

A: The objective of the question is to identify the type of potential that is a local, graded…

Q: Local potentials are graded

A:

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: 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: ATP is used to power the creation of a neuron's resting potential. True False

A: Resting potential of the neuron is -70 mV.

Q: Describe the distribution of voltage gated ion channels in the nodes of Ranvier-vs-trigger zone/axon

A: Voltage gated ion channels are multi-subunit protein complexes that respond to changes in membrane…

Q: Tetrodotoxin from pufferfish is a poison that blocks voltage-gated Na+ channels. Therefore it…

A: Tetrodotoxin (TTX) is a neurotoxin with high potency. Pufferfish, porcupinefish, ocean sunfish, and…

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: Drag and drop the following events of an action potential into its correct order: Voltage-gated Na*…

A: An action potential occurs in neurons and muscles cell. It can be defined as a sudden, rapid,…

Q: Select one: O A. hyperpolarizing phase; K channels open B. hyperpolarizing phase: Na channels open…

A: The action potential is the change in the electric potential across the plasma membrane.

Q: At which point in the graph do voltage-gated potassium channels open? (Base your answer to this…

A: The action potential refers to the sudden changes in the resting membrane potential of the neuron…

Q: Membrane permeability at the falling phase of an action potential is dominated by: O Co-transporters…

A: The neurons send signals over long distances by generating and propagating action potentials over…

Q: A drug binds to sodium voltage-gated channels and prevents them from opening. Which of the following…

A: The development of nerve impulse depends on the differential concentration of different ions across…

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.