An action potential at a given stretch of a neuron's axon does not re-stimulate the neighboring region that was previously depolarized because in that region . Select one: O A. the voltage-gated K* channels are blocked by inactivation loops. B. there is an imbalance in the Nat and K* concentrations between the cell and the extracellular fluid. O C. the voltage-gated Na* channels are closed but not inactivated. O D. the voltage-gated Na* channels are open. O E. the voltage-gated sodium channels are inactivated.

Q: For a signal to be sent down an axon of a nerve cell, an action potential must be generated. This is…

A: signal to be sent down an axon of a nerve cell, an action potential must be generated.

Q: Charge from depolarization along the axon reaches the axon terminal, but there is a lack of…

A: Neurotransmitters can be defined as a chemical molecules that are involved in the transmission of…

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: Both potassium and sodium channels located along the nerve membrane are voltage-gated. This means…

A: Neurons send the signal electrochemically. The chemical molecules are called ions to have an…

Q: The exocytosis of the synaptic vesicles depends on:

A: Synapse is the junction between two neurons. It is formed between the dendrites of one neuron and…

Q: You are recording the electrical activity of a cell body with a resting membrane potential of -70…

A: Given; Resting membrane potential of the cell= -70mV No. of stimuli detected by the cell= 3 from…

Q: Action potentials are normally initiated at the axon hillock because a. there is a particularly high…

A: When the membrane potential of a given cell location rapidly rises and falls, an action potential…

Q: Choose the item in column 2 that best matches each item in column 1…

A: The nervous system of our body is concerned with the functions of sensory reception, processing, and…

Q: Let’s say the synapses of a neuron’s dendrites are filled with glutamate-gated channels which, when…

A: EPSP refers to the excitatory postsynaptic potential which is generated as a result of the…

Q: Which of the following is TRUE regarding the absolute and relative refractory periods of the action…

A: The relative refractory period is that the interval of your time throughout that a second action…

Q: Which of the following primarily reflects the opening of voltage-gated Na* channels? A. The resting…

A: Voltage-gated Na+ channels are gated, meaning that they can be opened or closed in response to…

Q: Can you explain to me why choice E is the correct answer and break down why the other options are…

A: Resting potential is the membrane potential when the neurons are not sending electrical signals,…

Q: Voltage-gated Na+ channels are.... (select all that apply).  Group of answer choices: A. Opened by…

A: The channels are basically membrane proteins that act as transport protein through which various…

Q: During repolarization a  potassium ions (K* ) flow into the neuron. b  potassium ions (K* ) flow…

A: The response that our body gives to any external stimuli is due to the transfer of impulse from the…

Q: Fluorescent FM dyes partition reversibly into biological membranes without penetrating through them.…

A: FM dyes are fluorescent compounds used in the examination of the process of recycling vesicles.…

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: Which of the following is NOT an example of communication that happens from one neuron to another…

A: Answer: - Option a - Endocrine signalling (ex. hormones secreted into the bloodstream travel and…

Q: gradient is responsible for both the resting membrane potential and the action potential in the…

A: resting  neuron has a certai. voltage across its membrane called the resting membrane potential.

Q: Local anesthetic is often used in dentistry to lessen the sensation of pain during dental…

A: When membrane is in resting condition, it is only permeable to potassium ions and nearly impermeable…

Q: In signal transduction in the dark, the cGMP plays what role? a. It promotes an action potential…

A: Cyclic GMP (cGMP) is "Guanosine monophosphate" in which the phosphate group is covalently linked to…

Q: Make an illustration that discusses the Polarized state (mV inside the neuron, ions present/abundant…

A: Neuron like any other cell is surrounded by a plasma membrane which is Semi permeable that is it…

Q: You prepare a squid giant axon and inject it with a tiny volume of solution containing 0.1 M NaCl…

A: At beginning the radioactive Na+ ions and K+ ions are remains inside of the axon, as a result of…

Q: I have stimulated a neuron with dopamine for a second followed by treating it with cocaine and…

A: Homeostasis of calcium ions is essential for survival and neuronal function. In the nerve cells,…

Q: You generate action potentials in a neuron bathed in solution in a petri dish by applying a…

A: An action potential is a rapid sequence of changes in the voltage across a membrane. This action…

Q: 2) Draw a typical neuron and the relative ion concentrations (high or low) for Na+ and K+ inside and…

A: Neurons are specialized cells responsible for transmitting information throughout the nervous…

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: Action potential conduction velocity is more rapid in a myelinated axon than an unmyelinated one…

A: The myelinated and unmyelinated nerve fibers are the two types of nerve fibers.  Myelin is a fatty…

Q: At a chemical synapse, an action potential triggers an influx of Ca2+ which . Select one: O A.…

A: When the action potential reaches the presynaptic neuron terminal, it activates the voltage-gated…

Q: Which of the following statements regarding polarized membranes is incorrect? a. There is a…

A: At rest, the ionic composition of the interior and outside of a neuronal membrane varies. As a…

Q: Jose measures membrane potential in two neighboring cells. He notices that when the membrane…

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

Q: Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What…

A: Neurons are the basic functional unit. It is a specialized cell that is designed to transfer…

Q: Would anyone be able to explain these different channels? I would like an explanation as to why…

A: All ion channels are primarily located at their respective sites depending on their response to that…

Q: What membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of…

A: Ans:- the option is (c)-the voltage gated sodium chennel.

Q: The two primary factors that influence the speed of an action potential propagation are axon…

A: The nervous system is an exceptionally complex piece of a creature that arranges its activities and…

Q: Choose the correct sequence of events along an axon: a. Resting potentials are propagated along a…

A: When the neuronal membrane becomes depolarized, either via the delivery of an electric current or…

Q: Ordinarily, a neuron’s trigger zone is activated before any other part ofan axon, so a wave of…

A: Nerve cells are electrically excitable cells that method and transmits information by electrical and…

Q: Which one of the following is true of the concentrations of ions inside and outside of an…

A: A neuron, also known as a nerve cell, is an electrically excitable cell that communicates with other…

Q: During the absolute refractory period (ARF) the voltage-gated sodium channels are mostly in their […

A: The absolute refractory period is the time following an action potential during which no additional…

Q: Which of the following situations correctly illustrates the all-or-none principle? Select one: a. A…

A: The magnitude of the action potential in any nerve fiber is independent of the strength of the…

Q: Sensory neurons in the homeostatic pathway demonstrate spontaneous activity.  For a neuron, what…

A: A neuron is a specialized cell that transmits electrical and chemical signals in the nervous system.…

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.