An influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium channels resulting in a further influx of positive sodium ions, and thus the initial stages of an action potential are regulated by ______ feedback.

Q: “All-or-none” response in impulse conductionmeans that

A: A biological cell performs numerous biochemical functions. The longest cell is the neuron. It is…

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: In an excitable cell at rest, we expect to find ______ ions effluxing out of the cell through leak…

A: The cell is said to be at resting membrane potential when the cell potential is at rest, and the…

Q: What are the steps to action potential

A: Action potential  An action potential is a short burst of electrical event that occurs in the…

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: Extracellular recordings create a distinct action potential. Choose the option that best describes…

A: INTRODUCTION :  Extracellular recordings - These are recordings of electrical potentials which are…

Q: If the membrane potential at the axon hillock becomes subthreshold, an action potential will be…

A: The region of the neuron from which the axon develops is known as axon hillock, and this region is…

Q: A neuron receiving a large enough signal, a resting potential changes and produces electrical…

A: Introduction  Nerves play vital role in conduction of signals from CNS to various other organs,…

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: The action potential is a voltage pulse at one location on a cell membrane. How does it get…

A: Neurons are the basic structural and functional unit of the nervous system. Neurons have three…

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: At __________ synapses, neurotransmitters hyperpolarize the membrane, by making it more permeable to…

A: The synapse is the connection between two neurons. In case of chemical synapse neurotransmitters are…

Q: The change in the electrical balance between the intra- and extra-cellular fluid that occurs when a…

A: The messages sent by neurons are in the form of electrochemical signals, indicating that these…

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: 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: What an electrical current is, and how sodium ions and gated membrane channels generate a current.

A: Electrophysiology is the mechanism of the cell for producing electrical currents and potentials. For…

Q: Substances that mediate and amplifies signals inside the cell called __________ (H) __________

A: Signal amplification means when the original signal is conveyed it is in Lower frequency and when it…

Q: summary of the whole process of action potential

A: Action potential It is defined as a sudden, fast ans propagating change of the resting membrane…

Q: A/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic…

A: Chemical synapse

Q: Describe in detail the three types of potentials seen in neurons

A: The human body contains few excitatory cells such as neurons, muscle fibers, and some endocrine…

Q: True or false: V1 simple cells receive input from layer 4C cells via excitatory receptors.

A: The correct response is True.

Q: A patient is given a drug that blocks the L-Type calcium channel blocker. Which phase of the action…

A: Signal transduction pathways translate signals received at the cell's surface into cellular…

Q: eurons have a resting membrane potential of ___________________.   varying votage as type and…

A: The resting potential is mostly determined by the concentrations of the ions in the fluids on both…

Q: Hyperpolarization is defined as an increase in membrane potential toward zero.

A: Hyperpolarization occurs when the membrane potential becomes more negative at a particular spot on…

Q: ATP is used to power the creation of a neuron's resting potential. True False

A: Resting potential of the neuron is -70 mV.

Q: A person is given a drug that blocks the voltage-gated sodium ion channels in the plasma membrane of…

A: The Acetylcholine is one of the most vital neurotransmitter in the human body, that is seen in both…

Q: Response Afferent Efferent Balance pathway pathway Effector Receptor Receptor IMBALANCE Control…

A: Homeostasis is the essence of the life of warm-blooded organisms on the earth. Due to the varying…

Q: Enumerate the events in action potential and explain what is taking place in  each event (focus on…

A: An action potential happens when a neuron or nerve cell sends information down an axon. It is an…

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: The primary difference between an EPSP and an IPSP is what? The direction of membrane polarization…

A: In EPSP (excitatory postsynaptic potential) the binding of neurotransmitters causes depolarization…

Q: Which of the following would occur if you were measuring the voltage of a motor neuron that was…

A: They are regulated by inhibitory neurotransmitters such as glutamate and GABA. They prevent an…

Q: Temporal summation occurs when local potentials overlap in time.   a TRUE   b FALSE

A: An action potential is defined as the sudden, fast, transitory and propagating change in the resting…

Q: Neuron(key terms:dendrites, axo,electrical signals, communication) One important structure/feature…

A: The brain is made up of neurons and glial cells. These neurons are made up of components that helps…

Q: neurology, Will abolishing extracellular calcium concentration prevent electrical neuro transmission…

A: When the action potential reaches the nerve terminal, it activates voltage-dependent calcium…

Q: Describe the four stages of an action potential in what is happening in each stage

A: The nerve impulse is changed in membrane voltage. Normally all the cells have a change in the…

Q: what is the correct order of the phases of an action potential

A: Introduction: The resting membrane potential, often known as the resting potential, is a voltage…

Q: The place where a neuron and myocyte communicate is a call a _ junction

A: Neurons interact with other neurons and muscle cells through action potentials. They are short…

Q: Describe the role of sodium ions and sodium channels in generating an action potential

A: Sodium serves as both electrolyte and mineral, very abundant ion present in the extracellular fluid.…

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: 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: An increase in the magnitude of depolarization by a graded potential will increase the threshold…

A: Graded potentials occur in plasma membrane of cells but in neurons they occur in the synaptic…