the refractory period is a time during which
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Refractory period (physiology) In physiology, a refractory period is a period of time during which an organ or cell is incapable of repeating a particular action, or (more precisely) the amount of time it takes for an excitable membrane to be ready for a second stimulus once it returns to its resting state following an excitation.
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- Refractory period. For a short period after the passage of an impulse, the threshold for stimulation is raised, such that if a nerve is stimulated twice in quick succession, it may not respond to the second stimulus. The absolute refractory period is the brief interval after a successful stimulus when no second shock, however maximal, can elicit another response. Its duration in mammalian A fibres is about 0.4 ms; in frog nerve at 15oC it is about 2 ms.
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Period (physics) A period T is the time needed for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the period of the wave decreases.
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Refractory period 1 Psychological refractory period, the delay in response to the second of two closely spaced psychological stimuli.  Postictal state, the period following a series of epileptic seizures during which seizures cannot be induced.
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- Quick Answer. A critical period in psychology refers to a specific time during development when the brain is particularly receptive to acquiring a skill or knowledge. When exposure occurs after this critical period has elapsed, it is much less effective. Continue Reading.
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- Refractory periods. Impulse conduction-an impulse is simply the movement of action potentials along a nerve cell. Action potentials are localized (only affect a small area of nerve cell membrane). So, when one occurs, only a small area of membrane depolarizes (or 'reverses' potential).
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Tertiary Period Tertiary Period. Tertiary Period, interval of geologic time lasting from approximately 66 million to 2.6 million years ago. It is the traditional name for the first of two periods in the Cenozoic Era (66 million years ago to the present); the second is the Quaternary Period (2.6 million years ago to the present).
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- Considering the excitability of the neuron following an action potential, it can be seen that the neuron is not excitable at all during the absolute refractory period, however, neuronal excitability recovers in a time-dependent (and also voltage-dependent) manner follwoing the absolute refractory period (Fig. 2).
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What Is The Purpose Of Refractory Material? A commercial boiler must be durable in order to handle chemicals, heat and pressure. One component that lends strength to the equipment is the boiler refractory. The refractory is the heat-resistant material that lines high-temperature furnaces and reactors and other processing units, including commercial boilers.ne component that lends strength to the equipment is the boiler refractory. The refractory is the heat-resistant material that lines high-temperature furnaces and reactors and other processing units, including commercial boilers.
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- The period during which a stronger than normal stimulus is needed in order to elicit an action potential is referred to as the relative refractory period (RRP).
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Chapter 12 Set 2 - Refractory Period and Synapses The second half of chapter 12 Refractory Period, Action Potential propagation, axon classification, and synapse classification. Refractory Period. The time period from the beginning of the action potential to the return to resting state during which the membrane will not respond normally to additional stimuli. Absolue Refractory Period. Period during which the sodium channels are open or inactivated and no action potential is possible. Relative Refractory Period. Period during which the membrane potential is almost normal and only very large stimuli can initiate an action potential.
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T wave The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period. The last half of the T wave is referred to as the relative refractory period (or vulnerable period). The T wave contains more information than the QT interval.
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Human Physiology/Print Version Schematic representation of normal ECG. In electrocardiography, the T wave represents the repolarization (or recovery) of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period.
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How Long is Your Refractory Period? Any interest in sex you had appears to be gone and some unfortunate men want nothing more than to sleep, even as their partners sulk. The length of this refractory period varies from man to man, with some men taking 15 minutes while others may take as long as 24 hours. This is one of the reasons why if you jerk off in the morning, you have no interest in your partner later that night.
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What is a 'Holding Period' Holding Period. Share. What is a 'Holding Period'. A holding period is the real or expected period of time during which an investment is attributable to a particular investor. In a long position, the holding period refers to the time between an asset's purchase and its sale.
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Critical period For other uses, see window of opportunity. In developmental psychology and developmental biology, a critical period is a maturational stage in the lifespan of an organism during which the nervous system is especially sensitive to certain environmental stimuli.
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What is a 'Holding Period' What is a 'Holding Period' A holding period is the real or expected period of time during which an investment is attributable to a particular investor. In a long position, the holding period refers to the time between an asset's purchase and its sale. In a short sale, the holding period is the time between when a short seller buys back the securities and when the security is delivered to the lender to close the short position; in other words, holding period is one day.
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- Other studies. According to some studies, 18-year-old males have a refractory period of about 15 minutes, while those in their 70s take about 20 hours, with the average for all men being about a half-hour. Although rarer, some males exhibit no refractory period or a refractory period lasting less than 10 seconds.
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Cardiac Action Potential - Cellular Basis A key feature of cardiomyocyte electrophysiology is the refractory period of cells to rapid restimulation. Cardiomyocytes enter their refractory period immediately after undergoing an action potential and during this time cannot be induced to undergo another action potential. The phenomenon of the refractory period prevents a cardiomyocyte from being restimulated by action potentials occurring in adjacent cells to which the action potential has just been spread.
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Translations for refractory period Wiktionary(0.00 / 0 votes)Rate this definition: 1  refractory period(Noun) The period, after excitation, during which a membrane recovers it polarization and is not able to respond to a second stimulus. 2  refractory period(Noun) a recovery phase after orgasm during which it is physiologically impossible for an individual to have additional orgasms.
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- The propagation of action potential is independent of of stimulus strength, but is dependent on refractory periods. The period from the opening of the sodium channels until the sodium channels begin to reset is called the absolute refractory period.
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CHAPTER Recovery of neuronal excitability. During the absolute refractory period, the neuron cannot be excited to generate a second action potential (no matter how intense the stimulus). As Na+ channels begin to recover from inactivation, excitability is gradually restored.
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refractory Definition. Material that can withstand very high temperatures 3000°C or more without degrading or softening. Refractory materials include certain ceramics and superalloys, and are used in heat insulation of furnaces, jet and rocket engines, and parts of space vehicles such as the shuttle.efractory materials include certain ceramics and superalloys, and are used in heat insulation of furnaces, jet and rocket engines, and parts of space vehicles such as the shuttle.
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Paralytic Ileus Prognosis of the condition depends on the severity of the disease. Usually with prompt diagnosis and treatment, the prognosis is expected to be good. Paralytic ileus is a temporary phenomenon and gets resolved with proper treatment.
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- The physics definition of period is the duration of one complete cycle of a wave or oscillation.
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T wave In electrocardiography, the T wave represents the repolarization, or recovery, of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period. The last half of the T wave is referred to as the relative refractory period or vulnerable period. The T wave contains more information than the QT interval. The T wave can be described by its symmetry, skewness, slope of ascending and descending limbs, amplitude and subinte