Which of the following is FALSE about action potentials?      At resting potential, there are more potassium channels open and most sodium channels are closed.     Depolarization is due to the flow of Na+ out of the axon via voltage-gated Na+ channels.     Hyperpolarization is due to continued loss of K+ from the axon.     During repolarization, K+ flows out of the axon along its concentration gradient.     Resting membrane potential is primarily established by the Na+/K+ pump.

Q: Patch clamping is a technique to record the electrical potential or to measure currents generated by…

A: Tetrodotoxin is an extremely robust poison (toxin) discovered in particular within the liver and sex…

Q: Which of the following describes a threshold potential?   A brief reversal of the charge difference…

A: Answer. All cells have an electrical potential difference, or membrane potential, across the plasma…

Q: If you inhibit the closing of sodium channels what do you predict the effect on neuronal function…

A: Action potential in neuron is the direct consequence of voltage gated sodium channel. During the…

Q: The opening of axonal voltage-gated K+ channels is responsible for which part of the action…

A: Theses channels locate in cell membranes and control transportation of K +ions efflux from and…

Q: Which of the following neurons depicted below will generate the largest post-synaptic response? A В…

A: The pre synaptic neuron releases neurotransmitters in the synaptic cleft. These neurotransmitters…

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: Repolarization of an axon during an action potential is produced by a. inward diffusion of Na+. b.…

A: A stage of action potential in which the cell undergoes a decrease in voltage, is known as…

Q: During the _____ phase of an action potential, both gates of the voltage regulated sodium channels…

A: The action potential (AP) is generated by the neurons and the muscle cells. The AP is comprised of…

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: The toxin of the velvet sea snake prevents the sodium channels from inactivating. Which of the…

A: When Voltage gated Na+ channels open it leads to depolarization of the neuron i.e resting membrane…

Q: What is occurring during the repolarization phase of an action potential? O Voltage-gated…

A: Answer. All cells have an electrical potential difference, or membrane potential, across the plasma…

Q: An action potential is something that only occurs at synapses. Afferent pathways send sensory…

A: 1. False 2. True 3. False  4. True 5. False 6. True 7. False 8. True

Q: In the resting state, before or long after an action potential occurs, the activation gates of…

A: Voltage-gated Na+ channels have three main conformational states: closed, open and inactivated.…

Q: The changes in membrane potential when a neuron is transmitting information is called .....…

A:

Q: The main function of an axon is to... genreate EPSPs or IPSPs when neurotransmitters bind their…

A: Nervous system involves highly complex part of the animal that controls and co-ordinates the actions…

Q: An influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium…

A: VOLTAGE GATED SODIUM CHANNELS These are integral membrane proteins that change conformation in…

Q: he entire membrane does not depolarize at the same time. Instead, an action potential is propagated…

A: 1.The electrochemical wave that travels along nerve fibre and stimulates muscles, glands or other…

Q: All of the following are directly involved in synaptic transmission excepta. voltage-sensitive ion…

A: All of the following are directly involved in synaptic transmission except

Q: When no action potential is occurring, the inside surfaces of a cell membrane is ______.   A…

A: Within a single neuron, information is conducted through electrical signaling. When a neuron is…

Q: Quantal hypothesis refers to all the following except . . . Neurotransmitter is released in packets…

A: The quantal analysis is a group of methods that use statistical models to extract the basic…

Q: In an experiment, the extracellular [Na+] surrounding a nerve cell was reduced from 145 to 45 mM.…

A: In the presence and absence of an impulse, the nerve cells exist in two states known as action…

Q: During the _____ phase of an action potential, the membrane potential is more positive than the…

A: Phases of generation of action potential from resting membrane potential  Depolarisation…

Q: Once a pre-synaptic neuron has stopped firing, all of the following will stop the local potential in…

A: Once the neurotransmitters have been released and have bound to postsynaptic receptors,…

Q: Which of the following actions is paired INCORRECTLY with its numbered position on the graph? 501 30…

A: Channel proteins aid in the entrance and departure of substances within the cell. Channel proteins…

Q: Immediately after an action potential has peaked, which cellular gates open? O calcium Ochloride O…

A:

Q: An influx of positive sodium ions eventually causes closing of the inactivation gates of voltage…

A: When a cell is at a resting state, generally the interior of the cell has negative charge than…

Q: The figure illustrates changes in membrane potential during an action potential. The action…

A: The graph represent the stages of conduction of nerve and the change in membrane potential of the…

Q: Which of these ions is actively transported through the cell membrane to re-establish a resting…

A: Resting phase  The potential difference(a charge) across the membrane at rest is called the resting…

Q: You add an inhibitor to the voltage-gated K+ channel and then stimulated a nerve cell to cause an…

A: The nerve cells or neurons shows electrical properties that helps the neurons to conducting the…

Q: A pre-synaptic neuron releases the excitatory neurotransmitter Glutamate. What must be present in…

A: Signals are transmitted by the nervous system to the brain and spinal cord as a result we do our…

Q: In this phase, ALL voltage-gated Na+ channels are in the process of re-setting and cannot be opened…

A: An abrupt, quick, temporary, and spreading shift in the resting membrane potential is classified as…

Q: Neurons have an electrical charge across their membranes called the resting potential when they are…

A: Answer : Neurons have an electrical charge across their membranes called the resting potential when…

Q: Neurons have an electrical charge across their membranes called the resting potential when they are…

A: The nerve system and the hormonal system work together to regulate and coordinate the human body.…

Q: The membrane potential caused by differences in ions across the plasma membrane of an electrically…

A: All neurons are surrounded by positively charged K+ and Na+ ions and negatively charged Cl- and…

Q: Which of the following statements is correct with regard to ionic concentrations at the normal…

A: Resting potential is the stage when a neuron is not actively signaled. A neuron that is at resting…

Q: Which of the following statements is TRUE about temporal summation? The postsynaptic cells potential…

A: Introduction :- Sensory summation that involves the addition of single inputs over a short period of…

Q: Which of the following statements is most correct about the speed of neural transmission? Myelinated…

A: "The nervous system" of all animals is made up of unique cells known as neurons, which serve as the…

Q: which one of the following statements is incorrect? a. temporal summation occurs when a single…

A: A neuron is a basic unit that serves as a medium for the transmission of a signal (nerve impulse)…

Q: Which of the following statements is mismatched with the neurotransmitter? binds to muscarinic…

A: Neurotransmitters are chemical messengers involved in neurotransmission. These are released at the…

Q: Which of the following is NOT true regarding the changes that occur during an action potential.…

A: An action potential occurs when the membrane potential of specific cell location rapidly rises and…

Q: Select

A: Action potential:- An action potential is defined as a sudden,fast, transitory and propagating…

Q: Which of the following statements about action potentials and information transmission in the…

A: Introduction Action potential:- It is defined as a transitory, fast, sudden, and propagating change…

Q: Some have compared the "all or none" action potential to flushing a toilet. The relative refractory…

A: The all-or-none law is a principle that states, there will either be a full response or there will…

Q: The transmission of action potentials down a myelinated axon is faster but "saltatory" because of…

A: Saltatory conduction is the propagation of action potentials along myelinated axons from one node of…

Q: The following graph shows that if a neuron is depolarized briefly and then hyperpolarized slightly,…

A: In nerve cells, Na+ is important for generation of the action potential. As the Na+ current is…

Q: The terminal bouton of an axon releases a neurotransmitter that affects a postsynaptic receptor,…

A: Neurotransmitter: Neurotransmitters are the chemical messengers that transmit signals to target…

Q: Consider the following image that shows the membrane potential in a neuron when it is transmitting…

A: In a resting nerve fibre that is not conducting any impulse, the axoplasm is contains high as conc.…

Q: Which of the following phases of an action potential is correctly matched with the changes in ion…

A: