0
How can the level of pain you feel vary if a stimulus casues an all-or-none response?
Kristaxx
The stimulus causes an "Action potential" which is a nerve signal to the brain to indicate whatever happened. This is an all or none response, but the intensity of pain is given by the frequency of these signals.
The stimulus can be very large and the larger it is, the more frequent the Action Potentials.
THE SCIENCE:
* Voltage gated Na+ channels are opened when the charge within the cell moves past the threshold point - depolarization, causing an AP (once it's past the threshold point, it's an all or none response regardless of the strength of the stimuli and the same signal will be sent to the brain)
* Na+ rushes in and another voltage gated channel (this time K+ channel) opens when the charge becomes more positive * K+ channels allow K+ to move out of the cell (down its concentration gradient) repolarizing the cell. (the charge will become more negative because K+ is a positively charged ion)
* These K+ channels are slow to close and during this time is called the refractory period (where an action potential cannot occur again) * There is an absolute refractory period where another AP cannot be generated at all and a relative refractory period where it can * The the stronger the stimuli, the sooner within this refractory period another AP can be generated. Therefore, if the stimuli is strong, the APs will be more frequent, indicating a higer intensity of pain.
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoAdd your answer:
Earn +20 pts
Which of these is the goal of a negative feedback loop to A enhance a stimulus' action B release hormones C signal receptors to receive sensory info D return a substance to a normal level?
to return a substance to a normal level
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).
Describe the human body response at the cell level to perceived starvation threats as when a person is d?
fück the police
Are nerves connected to the fight or flight response?
Yes, through the sympathetic nervous system. An automatic, natural response to perceived danger. Causes increase in heart rate, blood sugar level etc for immediate action.
What happens to a neuron when a stimulus reaches the threshold level?
It simply and completely self destructs. You see, once the threshold is reached it no longer can sustance its physical structure due to power surges. This results in an power overload just like when a star such as the sun reaches critical level and eventually explodes resulting in a Supernova.
How does the threshold stimulus influence muscle contraction?
The threshold stimulus is the stimulus required to create an action potential. So any stimulus under this level will not cause muscle contraction, while a stimulus above this level will cause the muscle to contract. The higher the stimulus the more muscle fibers are recruited, and thus the higher the response.
What is the response if you increase the stimulus intensity past the threshold level for a neuron?
Try increases dramatically......
What happens at the level of the neuron starting with stimulus and ending with a response?
The stimulus is detected by the sensory receptor. The sensory receptor stimulates a sensory neuron. The sensory neuron transmits to the interneuron in the spinal cord. The interneuron stimulates a motor neuron. The motor neuron communicates to the muscle. The muscle(effector) then produces the response allowing the body to respond to the stimulus.
What three things need to be monitored in order to find your operant level?
To find your operant level, you need to monitor response rate, response latency, and response accuracy. Response rate refers to how many responses you make in a given time period, response latency refers to the time it takes to make a response after a stimulus is presented, and response accuracy refers to how correct your responses are. Tracking these three factors can help determine your operant level.
Stimulus-response theory how theory directly impactsis relevant to university level undergraduate students and their learning environment?
i also have my own problem....
What is the income eligibility level for stimulus housing grants?
What is the income eligibility level for stimulus housing?
Minimum level of stimulation required to trigger a neural impulse?
An action potential needs to occur to trigger the neurons but the action potential depends on whether a stimulus is able to bring the membrane potential to a certain level termed the THRESHOLD. This threshold is about -55 mV for most neurons, but the stimulus needs to bring the membrane potential to this certain level or it will not be triggered. Relating to the ALL-OR-NONE PRINCIPLE, which if the threshold is not acquired then an action potential will not occur but once a stimulus is strong enough to depolarize (making the inside of the cell less negative going from -70 mV to -55 mV) it will trigger. The resting potential is -70 mV which the stimulus needs to bring it up to -55mV.
A muscle fiber will not respond to a stimulus until that stimulus reaches what?
it will not respond until it reaches the threshold level
The level of sensory stimulus strength at which an individual can detect the stimulus at least 50 percent of the time is called?
an absolute threshold
What is the minimal level of stimulus to cause a muscle contraction?
it is known as the threshold stimulus usually seen in tonic contraction
What is the difference between stimulus frequency and stimulus strength?
<P> <P>The stimulus frequency is how often the stimulus is admitted. For example, every 30 seconds, every minute and 1/2, etc. <P>Stimulus strength describes the level of force used to administer the stimulus such as mild, moderate or maximum.</P>
How galvanometer helps in marketing research?
The skin's electrical conductivity changes with emotion. The galvanometer measures electrical conductivity. A polygraph (lie detector) uses this principle to determine the anxiety level involved in a response to a question. The subjects of the research could be monitored for their galvanometric response to different stimuli (products). The researcher could use the data to conclude that one stimulus elicits a stronger emotion than some other stimulus and is, therefore, better.
