Can measures of sensory acuity be obtained through filaments and biothesiometer? Explan why or why not Do you tink changing the frequency of the biothesiometer vibrations would affect your measured results? Why? Which settings affect the frequency of stimulation, which affect amplitude
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- The following were extracellular recordings obtained from the giant nerve fibers of an earthworm after delivery of a depolarizing stimulus at the time indicated. Which of the following letters corresponds with the fiber that had the fastest action potential conduction velocity? I OA 0.05 0 -0.05 -0.1. + Action Potential 0.024 B W 0.002 0.004 stimulus delivered A OB OC None of the above are correct; all had the same conduction velocity 0.006 C 0.008 0.01What is meant by the modality of a stimulus? Give someexamplesThe amplitude, frequency and duration of the stimulus delivered can be adjusted. Looking at the image of the stimulator panel, what is the frequency of the stimulus to be delivered in Hz?
- Indicate whether each of the following is an example of sensory transduction or transmission. lon channels in a sensory v [ Choose ] cell in the skin open in transmission response to a change in transduction temperature. The membrane potential in [ Choose ] the dendrites of a touch receptor moves toward 0 mV An action potential is [ Choose ] carried along a sensory neuron toward the brainWhen moved from darkness to light, the potential generated in photoreceptors is a ___1.choose your answer___. Specifically, this potential change is brought on in part by the PDE break down of ___2.choose your answer___ to ____3.choose your answer___, which then causes the ___4.choose your answer___ of __5.choose your answer__ channels. 1.Hyper polarization or repolarization or depolarization 2.GMP or cGMP 3.cGMP or GMP 4.opening or closure 5.sodium or calcium or potassiumDiscuss the concept of thought-controlled input devices and their potential in medical applications and assistive technology. What ethical considerations arise when using thought-controlled devices?
- The "All or None" response means that: A stimulus causes depolarization and repolarization regardless of the strength of the stimulus There is no threshold for an electrical stimulus signal to reach before depolarization and repolarization O Potassium channels open for depolarization and sodium channels open for repolarization A stimulus has to be strong enough for depolarization to occur followed by repolarizationMscS and MscL are mechanosensitive channels that ... O open at the same osmotic pressure, but differ in their ion selectivity. O All of these statements describe MscS/MscL. O open in response to membrane tension. O are highly ion selective. O constitute the majority of channel proteins in the plasma membrane of auditory hair cells in the human cochlea.How does a voltage clamp work? Group of answer choices -It holds the current across a neuronal membrane constant and measures the changes in voltage. -It holds the voltage of a neuron constant by injecting current equal to the ionic current passing across the cell membrane -It changes the membrane potential of a neuron using two extracellular electrodes. -It inactivates ion channels so that the only current passing into the cell is delivered by the equipment. -It measures the voltage of a neuron that is placed in the preparation
- The cone system and the rod system: differ in response saturation at high levels of illumination are equally devastating in case of damage O are equally specialized for sensitivity of photon capture O mediate scotopic and photopic vision, respectively Back Next Ne er submit passwordshiough Gooo msPhotoreceptors in the retina have special channels that are open to Na+ in the dark. When light hits photoreceptors, these special channels close. What can you cònclude from this? None of the above O Photoreceptors hyperpolarize to light Photoreceptors depolarize to light Photoreceptor voltage does not change in the presence of lightPlease find the answer to all three questions In the ERP Technique, Latency refers to to The number of neurons working together The time from the onset of a stimulus to the peak of a particular component The size of electrical change in microvolts of a particular component The number of trials averaged together ------------------------- Perception occurs at/in The sensory receptors Afferent neural pathways The brain The peripheral nervous system ------------------------- fMRI has better spatial resolution than EEG True False ------------------------- ERP has better spatial resolution than single unit recordings True False