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What is restpotential?
The resting membrane potential of a neuron is about -70 mV (mV=millivolt) - this means that the inside of the neuron is 70 mV less than the outside. At rest, there are relatively more sodium ions outside the neuron and more potassium ions inside that neuron.
What is it called more than one stimulus is added together?
When more than one stimulus is added together, it is called superposition. This is a fundamental principle in physics and signal processing where the combined effects of stimuli are considered as a single entity.
Why it is more difficult to initiate an action potential during the relative refractory period?
During the relative refractory period, the neuron is hyperpolarized due to the prolonged opening of potassium channels, making it harder to reach the threshold for firing an action potential. While some sodium channels are reset and can respond to a stimulus, the increased negativity inside the cell means that a stronger-than-normal stimulus is required to depolarize the membrane sufficiently. This period ensures that action potentials occur in a controlled manner, preventing excessive firing and allowing the neuron to recover.
What do resting and action potentials depend on?
The resting and action potentials depend on the balance of charges of the area outside the neuron and inside the neuron. A resting potential is when the neuron is more negatively (approximately -70mv) charged than the area outside the neuron. The action potential occurs when sodium ions rush into the neuron, causing the polarity to be reversed. When there is no difference in charge between the area inside the neuron and the area outside the neuron, no action potentials can be started by that neuron.
What proteins does a neuron make?
A molecule is many order of magnitude smaller than a neuron. A neuron is made of molecules not the other way around.
The period after initial stimulus when I neuron is not sensitive to another stimulus is the?
The period after an initial stimulus when a neuron is not sensitive to another stimulus is called the refractory period. During this time, the neuron is recovering and cannot generate another action potential, which ensures that signals are transmitted in one direction and helps maintain the integrity of the nerve signal. The refractory period can be divided into two phases: the absolute refractory period, where no stimulus can trigger an action potential, and the relative refractory period, where a stronger-than-normal stimulus is required to elicit a response.
What is the difference between the absolute refractory period and the relative refractory period in terms of neuronal excitability?
The absolute refractory period is a time when a neuron cannot respond to any stimulus, no matter how strong. The relative refractory period is a time when a neuron can respond to a stronger stimulus than usual.
A typical neuron has more than one of what?
axon
A typical neuron has more than one?
axon
How do you spell more than one stimulus?
Stimuli is the word you are looking for.
What is restpotential?
The resting membrane potential of a neuron is about -70 mV (mV=millivolt) - this means that the inside of the neuron is 70 mV less than the outside. At rest, there are relatively more sodium ions outside the neuron and more potassium ions inside that neuron.
Absolute refractory period relative refractory period?
In absolute refractory period, none of channels are reconfigured, so that second active potential cannot be generated no matter how large the stimulus current is applied to the neuron. In contrast, in relative refractory period, some but not all of channels are reconfigured, another action potential can be generated but only by a greater stimulus current thatn that originally needed.
What is definition of novel stimuli?
More than one new stimulus
What is the correct order of components of a reflex arc?
The three-neuron arc is the most common and consists of the afferent neurons, interneurons, and the efferent neurons. Afferent neurons conduct impulses to the CNS from the receptors. Efferent neurons conduct impulses from the CNS to effectors (muscle or glandular tissue). Two-neuron arc is the simplest form, fastest responding and consists of afferent and efferent neurons. Example is the knee-jerk reflex.
How do you spell stimulus if there is more than one?
The Latin plural of stimulus is stimuli. However, there is also an informal English form stimuluses.
When the outside of the neuron cell is more positive than the inside the cell is?
When the outside of the neuron cell is more positive than the inside, the cell is in a state of depolarization. This shift in electrical charge can trigger an action potential, leading to the propagation of nerve impulses along the neuron.
What is the definition of a submaximal stimulus?
A submaximal stimulus refers to an intensity level of a stimulus that is below the maximum level that a system or organism can respond to. It is often used in exercise physiology to describe a workload that does not elicit a maximal performance or physiological response.
