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The minimum stimulus needed to cause a contraction is called the?
The minimum stimulus needed to cause a contraction is called the threshold stimulus. This is the minimal level of stimulation required to activate muscle fibers and initiate a contraction response.
What happens when a neurons is above its threshold level?
When a neuron is above its threshold level, it generates an action potential. This is an electrical impulse that travels down the neuron's axon, triggering the release of neurotransmitters at the synapse. This allows communication with other neurons or muscles.
Why is the amplitude of the compound action potential recorded from the frog sciatic nerve increased when the voltage of the stimulus was increased above the threshold value?
Increasing the stimulus voltage above the threshold value results in recruiting more nerve fibers to generate action potentials. This leads to a greater number of action potentials being generated simultaneously along the nerve, resulting in a larger compound action potential amplitude being recorded.
Bacteria that live on the ocean floor are sustained by?
Bacteria on the ocean floor are sustained by organic matter that sinks down from above, including dead marine animals, phytoplankton, and other debris. They also may engage in chemosynthesis, using chemicals like hydrogen sulfide or methane from hydrothermal vents or cold seeps as an energy source.
What does sensation level mean?
The sensation level is measured in decibels. It is frequency specific and starts at 0 dB SL (sensation level) where 0 dB SL is the softest the patient can here a specific frequency. This means that the SL will be different for different people. Everyone's SL will start at 0 but my SL at 1000 Hz may be at 23 db IL and another's may be at 54 db IL.Put more simply, dB SL is the difference between a person's threshold of hearing and the presentation level of a stimulus. If a person's speech reception threshold (SRT) is 10 dB on an audiometer (dB HL) and you present a speech stimulus to them at 50 dB HL on the audiometer, their sensation level would be derived thus: 50 dB (presentation level) minus 10 dB (threshold), which equals a sensation level of 40 dB SL. This is also the procedure for a frequency-specific stimulus (e.g. pure tones): subtract the audiometric threshold (dB HL) from the supra-threshold presentation level (dB HL) and the difference is the sensation level (dB SL).
What is sub threshold Depolarization of nerves?
Sub threshold depolarisation of nerves, would be the influx of sodium (and maybe efflux of potassium depending) that doesn't cause enough depolarisation for an action potential to be fired. The summation of sub threshold depolarisations may cause an AP to be released. if they 'tip the balance' far enough. Hope this helps Edit: Above answer is vague. Sub threshold depolarizations do not occur as a result of efflux of potassium, which hyperpolarizes a neuron. They can be generated as EPSPs at the post synaptic membrane or result from persistant sodium channels, which do not completely inactivate (contributing to pacemaking activity). In both cases, gradual depolarization can lead to action potential generation.
Neuron receives a series of stimuli whose effect is excitatory but subthreshold?
Then it does nothing unless the stimuli arrive at the same time to be above the threshold. Or the stimuli may undergo temporal summation (with buildup of neurotransmitters in the synapse), where their effects add up over time to be above the threshold.
Why are most action potentials generated in response to a long stimulus that is above threshold?
Action potentials are generated in response to a long stimulus above threshold because it allows for the full development of the depolarization phase. This prolonged depolarization leads to the activation of voltage-gated sodium channels, triggering the rapid influx of sodium ions and initiating the action potential. A sustained stimulus ensures that the membrane potential remains above threshold for a sufficient time to generate an action potential.
What is meant by surpassing the renal threshold?
Type your answer here... It is nothing but surpassing the renal threshold of an individual above the threshold which was normal to that person in certain period.
What is lower threshold voltage?
the voltage above which any device starts conducting
What is sound called above the upper threshold of hearing?
Sound above the upper threshold of hearing is called ultrasound. It is typically defined as sound with frequencies higher than 20,000 Hz, which is the upper limit of human hearing.
What is renal threshold of glucose?
Renal threshold is what happens when there is an overabundance of glucose in the body, the blood glucose levels will then get above 170mg/100ml (normal is 70mg/100ml).
When electromagnetic radiation above the threshold frequency falls on an object it emits electrons?
Hhn
The minimum stimulus needed to cause a contraction is called the?
The minimum stimulus needed to cause a contraction is called the threshold stimulus. This is the minimal level of stimulation required to activate muscle fibers and initiate a contraction response.
What happens when a neurons is above its threshold level?
When a neuron is above its threshold level, it generates an action potential. This is an electrical impulse that travels down the neuron's axon, triggering the release of neurotransmitters at the synapse. This allows communication with other neurons or muscles.
Is an unauthorized commitment not binding solely because the agreement involved a purchase amount above the micro-purchase threshold?
An unauthorized commitment is an agreement that is not binding solely because the agreement involved a purchase amount above the micro-purchase threshold.
If your CPU is running high while running a particular program for a sustained amount of time is this bad for your computer in the long run?
No, not unless the CPU also raises above the safe temperature threshold and stays there for an extended period of time. Assuming by 'high' you mean CPU usage % as reported in Task manager or similar.
