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A series of similar stimuli that increases change in local membrane potential is called?
Wiki User
∙ 10y ago
Action potential
Wiki User
∙ 10y ago
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Is the basilar membrane receive sound waves via air?
I think basilar membrane is the receptors for sounds stimuli.
Neuron receives a series of stimuli whose effect is excitatory but subthreshold?
If a neuron receives a series of stimuli that have an excitatory effect but do not reach the threshold for action potential initiation, the neuron will not fire. This is because the individual stimuli do not generate a strong enough depolarization to reach the threshold. However, if enough subthreshold stimuli are received in a short period of time, they can summate and reach the threshold, generating an action potential.
What are the functions of the plasma membrane in Eukaryotes?
Plasma membrane gives structure to the cell, serve as boundary. It allows the selective passage of molecules across the cell (semi permeable). Starts the signalling event from the receptors it posses on the membrane surface when there is a stimuli bind to it.
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.
What triggers an action potential?
An action potential is triggered when a sufficiently strong neural signal reaches the trigger zone of a neuron, which is the axon hillock or the initial segment of the axon.The trigger zone contains a dense concentration of voltage-gated sodium-ion pores, which open and allow sodium ions into the neuron when the membrane voltage there rises from about -70mV resting potential to a trigger threshold of about -55mV as a result of a summing of inputs to the neuron.The resulting inrush of sodium ions through the ion pores is the beginning of the action potential.
In the absence of stimuli all cells in the body maintain a potential difference across the semipermeable membrane in which the inside of the cell is negatively charged in comparison to the outside?
resting membrane potential
What kinds of stimuli can elicit action potential?
Electrical , heat and chemical stimuli
What conducts local currents towards the soma?
Dendrites receive stimuli from other neurons. Charge is carried by ions. The direction of the charge flows in is determined by the electrochemical potential difference across the membrane and the properties of membrane ion channels.
Is the basilar membrane receive sound waves via air?
I think basilar membrane is the receptors for sounds stimuli.
When the interval between the stimuli decreases a second action potential is generated how?
When the interval between stimuli decreases, the membrane potential of the neuron has not fully returned to its resting state before the next stimulus arrives. This allows the neuron to quickly reach the threshold for generating a second action potential without returning to baseline. This phenomenon is known as temporal summation, where the combined effect of multiple stimuli within a short time frame can lead to the generation of subsequent action potentials.
When does a neuron exhibit resting potential?
The human nervous system consists of billions of nerve cells (or neurons)plus supporting (neuroglial) cells. Neurons are able to respond to stimuli (such as touch, sound, light, and so on), conduct impulses, and communicate with each other (and with other types of cells like muscle cells). Neurons can respond to stimuli and conduct impulses because a membrane potential is established across the cell membrane. In other words, there is an unequal distribution of ions (charged atoms) on the two sides of a nerve cell membrane. The membranes of all nerve cells have a potential difference across them, with the cell interior negative with respect to the exterior (a). In neurons, stimuli can alter this potential difference by opening sodium channels in the membrane. For example, neurotransmitters interact specifically with sodium channels (or gates). So sodium ions flow into the cell, reducing the voltage across the membrane. Once the potential difference reaches a threshold voltage, the reduced voltage causes hundreds of sodium gates in that region of the membrane to open briefly. Sodium ions flood into the cell, completely depolarizing the membrane (b). This opens more voltage-gated ion channels in the adjacent membrane, and so a wave of depolarization courses along the cell - the action potential. As the action potential nears its peak, the sodium gates close, and potassium gates open, allowing ions to flow out of the cell to restore the normal potential of the membrane. Membranes are polarized or, in other words, exhibit a RESTING MEMBRANE POTENTIAL. This means that there is an unequal distribution of ions (atoms with a positive or negative charge) on the two sides of the nerve cell membrane. This POTENTIAL generally measures about 70 millivolts (with the INSIDE of the membrane negative with respect to the outside). So, the RESTING MEMBRANE POTENTIAL is expressed as -70 mV, and the minus means that the inside is negative relative to (or compared to) the outside. It is called a RESTING potential because it occurs when a membrane is not being stimulated or conducting impulses (in other words, it's resting). Source : Internet.
What is the defference between membrane irritability and membrane conductivity?
Irritablity is the ability to respond to stimuli and convert it to nerve impulses. Conductivity is the ability to transmit that impulse.
The ability to respond to similar but distinct stimuli?
Stimulus Discrimination?
Responding to stimuli that are similar-but not identical-to a conditioned stimulus is call?
Responding to similar stimuli is known as generalization in classical conditioning. This occurs when an organism responds to a stimulus that is similar, but not identical, to the original conditioned stimulus that was paired with an unconditioned stimulus.
How does caffeine affect reaction times?
Caffeine increases the reaction time to visual and auditory stimuli
Can thunderstorm cause repeats in nightmares?
Yes. Similar external stimuli can result in similar dream-state manifestations.
Responding to stimuli that are similar but not identical to a conditioned stimulus is called?
Stimulus Generalization-
