The resting potential is:     the length of time that a neuron is incapable of activating after an action potential.     the term used to describe how the sympathetic nervous system reduces arousal and conserves energy.     a state in which a neuron has a negative electrical charge of about -70 millivolts.     a state in which a neuron has a positive electrical charge of +70 millivolts.

Q: After an action potential, the opening of voltage-gated ________ channels and the inactivation of…

A: Action potential When nerve cell respond to a stimulus, it generates electric impulse which travel…

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: Which of the following describe(s) the difference(s) between an EPSP and an IPSP? Select all that…

A: The synaptic junction can be excitatory or inhibitory in nature depending upon the release of which…

Q: Which of the following statements is not true about neurons?   When there is no active nerve…

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Q: Which of the following statements best describes the properties of a myelinated axons?     The…

A: Axons are surrounded by a multilayered protein and lipid covering, called the myelin sheath. Such…

Q: Temporal summation refers to: summation of action potentials in the temporal cortex. summation of…

A: IntroductionThe process of summing, which encompasses both spatial and temporal summation, decides…

Q: Which of the following statements best describes the features of voltage-gated K+ channels?…

A: Voltage-gated potassium (K+) channels are ion channels that help regulate the membrane potential 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: Cocaine blocks the removal of dopamine from the synapse, leading to a rapid rise of dopamine in the…

A: A synapse is a gap between two neurons through which electrical impulses pass. The presynapse is the…

Q: Dopamine is a major neurotransmitter in the mammalian brain that regulates mood, cognition and…

A: B.Action potential in presynaptic axon terminal results in the opening of calcium channels C.…

Q: When a neurotransmitter binds with receptors at the membrane, it may cause sodium channels to open.…

A: The endogenous chemicals which makes neurons to communicate with each other throughout the body are…

Q: Which of the following is the correct statement regarding ion channels?   Physical deformation of…

A: Ion channels, integral membrane proteins, facilitate the passage of ions through pore formations.…

Q: The interior of a neuron's plasma membrane at resting membrane potential will have a positive charge…

A: Membrane potential is also more commonly known as membrane voltage or transmembrane potential. It is…

Q: What is the difference between an action potential and a synapse? (select all that apply)

A: A characteristic pattern of quick rise and subsequent fall in voltage or membrane potential across a…

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 best describes saltatory conduction? A process in myelinated axons where the…

A: In contrast to the slow continuous process of depression extending down an unmyelinated axon,…

Q: There is a toxin extracted from pufferfish called tetrodotoxin (TTX), which completely inhibits…

A: Tetrodotoxin (TTX) is a potent neurotoxin that is responsible for many bouts and deaths each year.…

Q: Which of the following statements about the relationship between the nervous and endocrine systems…

A: Nervous system and endocrine systems are  co-ordinate with each other. The master of endocrine…

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: Which of the following are the likely explanations for the failure of a postsynaptic neuron to…

A: The postsynaptic element is often the soma or dendrite of a postsynaptic neuron. The other side of…

Q: You have a neural system with three neurons; two presynaptic (PS1 and PS2) and one postsynaptic…

A: Neurons are the fundamental, structural, and units of both the central and peripheral nervous…

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: When a neuron reaches threshold voltage, all voltage-gated channels are triggered to make…

A: Neurons are specialized cells that transmit information in the nervous system. When a neuron…

Q: The effect of the inhibitory neurotransmitter on the postsynaptic membrane is to   a. maintain the…

A: Depolarization of membrane potential excites the neurons. Depolarization refers to the change in…

Q: If the neuron is stimulated such that its membrane potential changes to 50 mV, what is the sign of…

A: The membrane potential is defined as the variance in electrical potential throughout the plasma…

Q: If a neuron is stimulated simultaneously by 2 stimuli at its dendrites (one generates a very large…

A: The cells of nervous system are called neurons. They have 3 distinct parts, including the body of…

Q: Match each type of membrane potential to its definition: The membrane potential at which voltage…

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Q: Which of the following does NOT determin how much neurotransmitter is released? Previous [Choose ]…

A: Neurotransmitters are a group of chemical substances which act as messengers to transmit signal from…

Q: Which of the following events correctly ranks steps in an action potential? 1. Voltage-gated sodium…

A: Electrical signals are how neurons communicate. Electrical signals are generated when there is a…

Q: Once an action potential reaches a neurotransmitter release site, the release of the…

A: When an action potential reaches the end of an axon terminal, it triggers the opening of…

Q: Which of the following situations O None of these result in exten O Compromising the inactivatio…

A: Normally, the cells maintain a negative charge compared to the exterior of the cell. This charge…

Q: The equilibrium potential for a given ion (Eion) is a theoretical value. For a given concentration…

A: When the electric potential across the cell membrane equals the saturation point of specific ionic…

Q: C +40mV - 0- -40mV -60mV - А DE В 1 4 Stimulus Time (msec) Membrane potential

A: Introduction: The brief sequence of events in the membrane potential following excitation is…

Q: If the resting membrane potential of a cell was +70 mV, the ELECTRICAL driving force on sodium would…

A: A neuron's purpose is to turn the message received from the external environment into an electrical…

Q: Neurotransmitters, the chemicals used in signaling across synapses, can be either re-absorbed by the…

A: Neurotransmitters can serve as chemical messengers for ion channels, neurotransmitter mainly causes…

Q: If action potential propagation from one neuron to another neuron requires ACH release, what event…

A: Introduction: The brief sequence of events in the membrane potential following excitation is…

Q: The membrane of a neuron is vital to its ability to respond to signals from other neurons. Which of…

A: Neurons are the cells of the nervous system that are responsible for the generation and transmission…

Q: Which of the following statements is FALSE? (Choose the best answer) O Neurons in the nervous system…

A: Synapses are the contact region between the axon terminal of the first neuron and dendrites of the…

Q: Consider the following three diagrams of a nerve cell membrane. They show resting potential,…

A: Cells are in resting membrane potential due to the differential ion concentrations inside and…

Q: Which of the following can increase the likelihood of a neuron generating an action potential?…

A: Genesis and conduction of Action potential The axoplasm inside the axon of a nerve contain high…

Q: Cystic fibrosis is a degenerative disease that causes the progressive breakdown of the myelin…

A: Introduction Cystic fibrosis (CF) is a genetic disease that affects the lungs, digestive system, and…

Q: A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV.…

A: Action potentials are the signals propagated through neurons in the form of electric impulse . These…

Q: Which of the following is FALSE about action potentials?      At resting potential, there are more…

A: Change in the membrane potential are brought about by changes in ion movement across the membrane.…