Q: When the membrane voltage shifts from the RMP to a more negative voltage; this is a_
A:
Q: - The spatial summation is the arrival of: a- Two action potentials at the same time at two…
A: When many presynaptic neurons operate together to release neurotransmitters such as acetylcholine…
Q: Propagation of action potential and transmission mean: current flow along the cell membrane…
A: Introduction: The action potential is the name given to the brief series of events that occur in the…
Q: During an action potential, what do the transient changes in membrane e permeability allow?
A: The sudden, transitory, propagating, and fast change in the resting membrane potential is called an…
Q: conductions system, what does an unstable resting potential mean
A: The circulatory system of the body consists of the heart, the blood vessels, and blood. The heart is…
Q: A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then…
A: Plasma membrane always try to maintain potential difference between the sides of the extracellular…
Q: in neurons when cl- influx into the axoplasm through chloride channel, hyperpolarization could…
A: Neurons conduct electrical impulse by using action potential, which is generated through flow of…
Q: When ionotropic receptors allow the influx of ions, the postsynaptic cell depolarizes. When they…
A: The neurons are the cells of nervous system that has the conducting capability. The nerve impulse…
Q: To maintain ________ action potentials are sent through ______ neurons.
A: Introduction The fast rise and fall of the membrane potential at a particular cell site is known as…
Q: One mechanism underlying the anesthesia is opening increase numbers of potassium leak channels.…
A: Anesthesia refers to the induced state of a person in which the sensation is temporarily lost. It…
Q: the normal extracellular Na+ concentration is 140 mM and you replace Na+ such that the extracellular…
A: Given The extracellular sodium is changed from 140mM to 14mM
Q: Describe the changes in the neuron membrane that occur throughout the course of an action potential.…
A: The action potential is an explosion of electrical activity that is created by a depolarizing…
Q: Describe the events that must occur to generate an AP. Relate the sequence of changes in…
A: The action potential is a quick increase and succeeding fall in membrane potential or voltage across…
Q: Fill in the blank: When sodium ions are actively transported outward through a nerve cell membrane,…
A: In neurons the plasma membrane is highly permeable to potassium ion (K+) and less permeable to…
Q: You discover a new toxin that causes excessive opening of Kv channels. What effect is this new toxin…
A: The action potential is a potential that is fired when the voltage-gated sodium ion channels open.…
Q: How much current actually flows across the membrane over the course of an action potential?
A: Cell to cell communication is an important aspect of all living organisms. It is required for the…
Q: The potential difference that must be met in order for an action potential to be generated When the…
A: Action potential An action potential is defined as an electric impulse that travels down through a…
Q: Fill in the blanks: When a nerve cell is at rest, there is a relatively greater concentration of…
A: A neuron is a basic functional unit of the nervous system. It is a complex network of specialized…
Q: Which of the following statements is TRUE of the action potential?
A: Sodium –potassium pump is one of the major biochemical pathways leading to critical physiological…
Q: Fill in the blank: The type of conduction in which an impulse seems to jump from node to node is…
A: The change in the electrical potential for a short period that travels along a cell is called an…
Q: What will happen if threshold value for the generation of action potential is not reached?
A: Action potential is an electrical signal that travels along the cell membrane of neurons. It is…
Q: Describe the resting potential for neurons. How is this potential established? Describe the…
A: A neuron or a nerve cell is the structural and functional unit of the nervous system. They are…
Q: How does increasing the intracellular Na+ concentration affect the action potential of a neuron?
A: The action potential is the characteristic increase and decrease of the membrane potential following…
Q: An 82-year-old woman is brought to the emergency room complain- ing of nausea, vomiting, muscle…
A: Introduction: Hyperkalemia is a condition of high potassium levels in blood.
Q: A damaged axon in the PNS may be able to regenerate only if the cell body is intact. why do you…
A: A neuron comprises many dendrites and each of them has one axon, which is also known as the nerve…
Q: The concentration of potassium ions inside a nerve cell membrane is higher than the concentration of…
A: Similar to plasma membranes, the membranes of neurons also contain selective permeability. This…
Q: Oligodendrocyte , Astrocytes 1. .......................... enhances the velocity of electrical…
A: The brain is the part of the central nervous system along with the spinal cord. It is the hub of…
Q: Of the following, which must be true for an action potential? I - Action potentials only occur when…
A: The action potential is a potential that is fired when the voltage-gated sodium ion channels open.…
Q: What kinds of changes in ion conductance may be expected in an action potential? And how do ion…
A: An action potential takes place if the membrane potential of a particular cell location rises and…
Q: rearrange these in the correct order of events in an action potential.
A: The process of impulse transmission involves two stages known as resting membrane potential and…
Q: Fill in the blank: Myelin contains a high proportion of _______________________.
A: The basic unit of communication in the nervous system is the neuron. A neuron is also called as…
Q: State the all-or-none law of the action potential.
A: When excitable cells such as a neuron, muscle cells, and endocrine cells are given a stimulus, the…
Q: The cells responsible for the transmission of the nerveimpulse are ________. a. neuronsb.…
A: Irritability is basic function of living beings which involves 'responses to stimulus'. A stimulus…
Q: Why are the currents generated by CNG and HCN channels typically depolarizing instead of…
A: HCN channel are voltage gated cation channel that conduct Na+ and K+ with a permeability ratio of…
Q: What properties of ion channels allow them to generate the large, rapid changes in membrane…
A: In the ion channel, the proteins expressed by all living cells make a pathway for charged ions from…
Q: Name 3 ways in which ion channels are controlled aka "gated."
A: Ion channels are pore-framing layer proteins that permit particles to go through the channel pore.…
Q: PNS is composed of ___________________
A: Sections of the nervous system outside of the brain and spinal cord are referred to as the…
Q: the potassium leak channels were suddenly blocked in a resting neuron, what would happen to its…
A: Normally the neuron has - 70millivolt resting membrane potential that means the interior of neuron…
Q: The walls of blood vessels in the brain are formed by cells that are very tightly packed. This…
A: C- The walls of the vessels in the brain are tightly packed or has a tightly junction which allow…
Q: Nerve membrane hyperpolarization after an action potential a)Is the movement of membrane potential…
A: The neuron is the basic working unit of the brain, a specialized cell designed to transmit…
Q: Refer to the figure below to explain the mediation of action potentials by neurons using sodium and…
A: Action potential consists of six phases, resting stage, rising phase, overshoot phase, falling…
Q: a) How does a CAP differ from a single action potential? b) Action potentials are said to be all or…
A: a*A compound action potential (CAP) is a signal from a nerve trunk which is made of numerous axons.…
Q: hyperpolarization repolarization…
A: Correct answer for the above questions is:- 1) C. 2) A. 3) B.
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: What would happen to the calcium transient following sympathetic stimulation? How are the transport…
A: The autonomic nervous system consists of two main divisions; sympathetic and parasympathetic…
Fill in the blank :-
The depolarization phase of action poten:-tials in neurons is due primarily to......... (ion) flow into the cell
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- The cells responsible for the transmission of the nerveimpulse are ________. a. neuronsb. oligodendrocytesc. astrocytesd. microgliaFigure 35.11 Potassium channel blockers, such as amiodarone and procainamide, which are used to treat abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of K+ through voltage-gated K+ channels. Which part of the action potential would you expect potassium channels to affect?If extracellular [Na1] is elevated, how would the resting potential and action potential of a neuron change?
- Fill in the blanks: When a nerve cell is at rest, there is a relatively greater concentration of _______________________ ions outsideof its membrane.Unmyelinated axons conduct action potentials without decrement, but when myelinated axons lose myelin in demyelinating diseases such as multiple sclerosis, conduction of action potentials is blocked. Why?CNS blood vessels are ___________ by neurons releasing __________ and __________ releasing prostaglandins. constricted, nitric oxide, neurons dilated, nitric oxide, astrocytes strengthened, growth factor, microglia strengthened, nitric oxide, oligodendrocytes
- Fill in the blank: An action potential is a rapid sequence of changes involving _______________________ and repolarization.fill in the blank ...............is the most common neurotransmitter in the peripheral nervous systemHow much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated?
- Fill in the blank: When sodium ions are actively transported outward through a nerve cell membrane, _______________________ions are transported inward.the potassium leak channels were suddenly blocked in a resting neuron, what would happen to its resting membrane potential?Fill in the blank: The type of conduction in which an impulse seems to jump from node to node is called _______________________
