Which determines a neuron's maximal rate of firing? The duration of the refractory phase O The amount of K+ ions available The amount of Na+ ions available O The voltage-gated Na+ channels

Q: A neuron with a resting membrane potential of -75 mV receives multiple inputs giving rise to the…

A: The action potential is a condition of a nerve impulse or electrical activity when there is a…

Q: What will happen when ligand gated sodium channels open on a neuron? What will enter/exit the cell?…

A: Ligand-containing ion channels bind to neurotransmitters and are open to responding to ligand…

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: The refractory period goes from "absolute" to "relative" when:   The inactivation gate of Na+…

A: Introduction: When the stimulus strength reaches at least reach the strength of threshold, there is…

Q: Which refers to the time during which a neuron can undergo an action potential? O the resting…

A: Nervous system is one of the most important system of our body it send and receive information via a…

Q: Assume the membrane is only permeable to Na+ and K+, the electrical model of axon membrane is the…

A: A membrane potential is the electrical potential difference across a cell membrane. It is determined…

Q: The trigger for an action potential is:

A: The potential difference across a membrane is known as the Membrane Potential. Frequent, rapid…

Q: The following figure is showing; Node Node Myelin sheath Node of Ranvier (a) Na+ ONa* Depolarization…

A: Axons are slender fibres that stretch from a neuron, or nerve cell, and are accountable for…

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: 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: Which is TRUE about typical, resting neurons? O The plasma membrane is most permeable to sodium…

A: Membrane potential is the electrical potential gradient that establishes between the interior and…

Q: Given that a neuron's action potential moved at a speed of 105 m/sec, would you expect this neuron…

A: Neuron is the nerve cell present in the nervous system. It transmits the impulse from brain to body…

Q: Bob and Joan know from a blood test that they are each heterozygous (carriers) for the autosomal…

A: A group of disorder that affects the hemoglobin is said to be sickle cell disease. An individual…

Q: Which of the following does NOT contribute to the establishment or maintenance of the neuron resting…

A: Neuron or nerve cells are cells that act as messengers, they are able to undergo  electrical…

Q: Tetrodotoxin is a poison that prevents voltage-gated channels from opening. Would this toxin prevent…

A: Tetrodotoxin is a potential neurotoxin which is extremely poisonous and can be found in the liver…

Q: A neuron receives a series of stimuli that increases the membrane permeability of Na ', but not…

A: The nervous system is one of the vital systems of a body. It is a system of nerves which carry…

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: Axon segment depolarized to threshold AP regenerated in adjacent axon segment Voltage-gated Na*…

A: A neuron or neural cell is the structural and functional unit of the nervous system. These cells…

Q: Synaptic transmission s terminated    by :-a- block of pretsynaptic receptorsb- elevation of Ca ++…

A: The biological process by which a neuron communicates with a target cell across a synapse is called…

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: The rising phase of the action potential is due to: O Na+ influx through voltage-gated Na+ channels.…

A: Introduction  An electrical signal called an action potential passes briefly over the membrane of a…

Q: What is the term used to describe an action potential apparently jumping from one node of Ranvier to…

A: Action potential refers to the change in the voltage or potential across the membrane of the neuron,…

Q: Regeneration of a severed axon has a better chance forsuccess in the PNS than in the CNS. Why is…

A: The nervous system involved in the transmission of impulses from all parts of the body to the brain…

Q: What happens at the nodes of Ranvier in a myelinated axon?

A: Introduction: Myelinated axons have microscopic gaps within them called nodes of Ranvier. These gaps…

Q: If the plasma membrane of an electrically excitable cellwere depolarized to threshold in the center…

A: An action potential is defined as a swift increase that is followed by a drop in the voltage or…

Q: Absolute refractory periods in axons: Result from conformational changes in voltage gated K channels…

A: The refractory period can be defined as the alternate rest period of muscles and neurons between two…

Q: Which neuron would probably have the fastest traveling action potentials? O Axon 10 µm and…

A: Neurons or nerve cells are the structural functional units of the nervous system. It is composed of…

Q: Which two ideas about ion channels of a neuron at its resting potential are true? O ion channels are…

A: The movement of ions across the plasma membrane is responsible for maintaining the resting potential…

Q: What is saltatory conduction? O The conversion of an electrical impulse into a chemical signal at an…

A: Electrical signals are conducted through electrically excitable nerve cells. The movement of ions…

Q: Where does an axon potential begin on an axon? O the action-potential initiating hillock (APIH) O…

A: The nervous system composed of two cells - neurons and neuroglia. Neurons are the nerve cells which…

Q: Which neuron (s) fired (released neurotransmitters) at the 3 points indicated by the arrows

A: Answer. The neurons communicate at their meeting points, called synapse. The smallest gaps…

Q: At the peak of an action potential, would the relative permeability of Na be higher than K? Which…

A: Generation of nerve impulse in nerve  fibres depends upon distribution of sodium and potassium in…

Q: Suppose you stimulate an axon so that you generate an actionpotential at both ends at the same…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: If neurons fire action potentials when membrane potential reaches -50mV, how would hyperkalemia…

A: Hyperkalemia is a medical condition where there is an excess of potassium ions (K+) in the…

Q: When is the charge inside a neuron at +40 millivolts? O during the refractory period O during the…

A: A membrane made up of a lipid bilayer with proteins incorporated in it surrounds all animal cells.…

Q: EPSP acilitates depolarization of postsynaptic mem ne by increasing the permeability of the membrane…

A: Answer.    The correct answer is option (d) An EPSP facilitate depolarization of the postsynaptic…

Q: More than one answer may apply When voltage gated sodium channels of a resting neuron open O Na…

A: Neurons (or nerve cells) are the ones that send and receive signals from your brain. They are…

Q: An inhibitory postsynaptic potential (IPSP) is associated with hyperpolarization a change in sodium…

A: A temporary hyperpolarization of the postsynaptic membrane generated by negatively charged ions…

Q: The conduction velocity in nerves is primarily dependent on the O localization of the Na+ / K+ pumps…

A: Nerve conduction velocity (CV) is an important aspect of nerve conduction studies. It is the speed…

Q: A loss-of-function mutation in the ion channel responsible for the generation of end-plate…

A: Introduction:- Mutation is defined as the heritable changes in the genetic material of an organism.…

Q: After a neuron fires an action potential, the lon concentration gradients are disrupted, What…

A: The neurons are the nerve impulse generating and transmitting cells in the nervous system. It is…

Q: If the membrane permeability for Na+ were suddenly increased in an excitable cell: (select all that…

A: When the membrane permeability for Na+ is increased, Na+ ions will diffuse into the cell more…