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How does mechanical stimulation of the nerve cause an action potential?
Mechanical stimulation of a nerve physically opens ion channels in the cell membrane, allowing ions such as sodium and potassium to flow across the membrane. This creates a change in the electrical charge inside the nerve cell, leading to depolarization and generation of an action potential.
Why would thermal stimulation increase an action potential?
By applying a thermal stimulation into the nerve, means you stimulate it. So with a thermal stimulation, you're already made a possibility to increase the Na+ flow faster.Because as heat, Na ions will move faster than room temperature. They move faster, cause the flow move faster, then the stimulate reach the threshold or even more than that.. causes the increased of action potential
What is a stimulus that results in no perceptible contraction?
A subthreshold stimulus is one that does not generate a strong enough signal to elicit a perceptible contraction in muscle fibers. It is below the threshold required to cause an action potential and result in muscle contraction.
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.
Does strong stimuli cause the strength of action potentials to increase?
No, it doesn't become "larger" - the peak potential is always the same - it is a digital signal. Stronger stimulus will cause the nerve cell to fire more often - therefore stimulus strength is translated as action potential frequency.
How does mechanical stimulation of the nerve cause an action potential?
Mechanical stimulation of a nerve physically opens ion channels in the cell membrane, allowing ions such as sodium and potassium to flow across the membrane. This creates a change in the electrical charge inside the nerve cell, leading to depolarization and generation of an action potential.
Why would thermal stimulation increase an action potential?
By applying a thermal stimulation into the nerve, means you stimulate it. So with a thermal stimulation, you're already made a possibility to increase the Na+ flow faster.Because as heat, Na ions will move faster than room temperature. They move faster, cause the flow move faster, then the stimulate reach the threshold or even more than that.. causes the increased of action potential
What is a stimulus that results in no perceptible contraction?
A subthreshold stimulus is one that does not generate a strong enough signal to elicit a perceptible contraction in muscle fibers. It is below the threshold required to cause an action potential and result in muscle contraction.
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.
What is the relationship between the action potential and the synapse?
A synapse and an action potential have a flip-flopping cause and effect relationship, in that an action potential in a presynaptic neuron initiates a release of neurotransmitters across a synapse, which can then subsequently potentially trigger an action potential in the axon of the postsynaptic neuron, which would then cause release of neurotransmitters across a following synapse.
Why does injection of a local anesthetic into a finger still cause a loss of the sensation of touch from the finger?
Touch stimulation of this sensory receptor will open the mechanically gated ion channels, but action potentials are still not initiated because propagation of an action potential requires the opening of voltage-gated Na+ channels
Does strong stimuli cause the strength of action potentials to increase?
No, it doesn't become "larger" - the peak potential is always the same - it is a digital signal. Stronger stimulus will cause the nerve cell to fire more often - therefore stimulus strength is translated as action potential frequency.
Why does meth amphetamine cause wildly sexual stimulation when other times there is none?
Methamphetamine can cause wild sexual stimulation when a person does not have this stimulation on a regular basis because the drug can cause the body to produce more hormones.
Does nipple stimulation cause a miscarriage?
no
Which fibers carry action potential to cause skeletal muscles to contract?
Alpha motor neurons
Do action potential cause electrical and chemical change in neuron?
Yes, you see when a action potential process is taking place the negative ions are in the center of the nerve and the positives are on the outside, during the action potential however they swap places, which in doing so changes the electrical and chemicals in the nerve cell.
What are the signs and implications of subthreshold symptoms in mental health disorders?
Subthreshold symptoms in mental health disorders refer to symptoms that do not meet the full criteria for a diagnosis but still cause distress or impairment. Signs of subthreshold symptoms may include mild anxiety, low mood, or occasional difficulty concentrating. These symptoms can still impact daily functioning and quality of life. It is important to address these symptoms early to prevent them from worsening or developing into a more severe mental health disorder.
