PhysioEx Exercise 3: Neurophysiology of Nerve Impulses is an interactive laboratory simulation that allows students to explore the physiological processes involved in the transmission of nerve impulses. The second activity of this exercise focuses on the role of ion channels in the generation and propagation of action potentials.
In this activity, students are first introduced to the concept of action potentials, which are electrical signals that are generated by neurons in response to stimuli. Action potentials are generated when the membrane potential of a neuron becomes depolarized, meaning that the voltage across the membrane becomes more positive. This depolarization is caused by the flow of ions across the membrane through ion channels, which are special proteins that are embedded in the membrane.
There are two main types of ion channels: voltage-gated ion channels and ligand-gated ion channels. Voltage-gated ion channels are sensitive to changes in the membrane potential, and they open or close in response to these changes. Ligand-gated ion channels are activated by specific molecules, called ligands, which bind to the channel and cause it to open.
In the second activity of PhysioEx Exercise 3, students are asked to investigate the role of ion channels in the generation and propagation of action potentials. To do this, they use a simulated neuron and apply various stimuli to it to see how the neuron responds. By adjusting the stimuli and observing the resulting changes in the neuron's membrane potential, students can learn about the different types of ion channels and how they contribute to the generation and propagation of action potentials.
One of the key concepts that students learn in this activity is the importance of the ionic gradient in the generation and propagation of action potentials. The ionic gradient is the difference in concentration of ions on either side of the membrane, and it plays a critical role in the movement of ions across the membrane. When the ionic gradient is disturbed, it can lead to changes in the membrane potential, which can in turn trigger the opening or closing of ion channels.
Overall, the second activity of PhysioEx Exercise 3 is an important learning opportunity for students interested in understanding the physiological processes involved in the transmission of nerve impulses. By interacting with a simulated neuron and applying various stimuli, students can gain a deeper understanding of the role of ion channels in the generation and propagation of action potentials and the importance of the ionic gradient in this process.
PhysioEx Exercise 3 Activity blog.sigma-systems.com
PhysioEx Lab Report Exercise 3: Neurophysiology of Nerve Impulses Activity 2: Receptor Potential Name: Karime Castillo Date: 29 May 2020 Session ID: session-8522d165-8156-9e52-5f40-c0d99e61ede Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. The amplitude of the response was 25 mV for this modality. In the control, the amplitudes of the action potentials at R1 and R2 are the same. Are these results called treppe or wave summation? Are these results called treppe or wave summation? Review Sheet Results A very intense stimulus can sometimes stimulate sensory neurons that have evolved for a different modality. Changing the extracellular Na+ concentration does not significantly change the membrane potential. What do your results suggest about the number or state open or closed of Na+ channels in the resting membrane of a neuron? How well did the results compare with your prediction? How well did the results compare with your prediction? I predicted that the moderate-intensity pressure would induce the largest amplitude receptor potential, but that was in reference to the options given which included chemical, light, and heat stimuli as well, but not the option of a high-intensity pressure option.
Physio Ex Exercise 2 Activity 3
. Your answer: By the term graded potential, it is meant that they are brief, localized changes to the membrane potential that can be either depolarizing or hyperpolarizing. The action potential is an all-or-none event. Your answer: You must increase the frequency of the stimulus stimulus to both to reach. In between these modalities, moderate-intensity pressure would induce the largest response, so it compared accurately with my predictions. Your answer: These are called wave summation, because there is a noted increase in frequency, which resulted in an increased in the force produced by the entire muscle. Your answer: The stimulus modality that induced the largest amplitude receptor potential in the Pacinian corpuscle was high-intensity pressure.
PhysioEx Lab: Exercise 4, Activity 2 Flashcards
The membrane has open K+ channels, and changing extracellular K+ concentration results in a change in membrane potential. Wave summation is achieved by You correctly answered: increasing the rate of stimulus delivery frequency to the muscle. Another way to increase the force produced by a muscle is to You correctly answered: increase the number of activated motor units. What passive channels are likely found in the membrane of the olfactory receptor, in the membrane of the Pacinian corpuscle, and in the membrane of the free nerve ending? I predicted that the moderate-intensity chemical would induce the largest amplitude receptor potential, but that was in reference to the options given which included pressure, light, and heat stimuli as well, but not the option of a high-intensity chemical modality. There will be a limit to this increase. How are they similar? All of these answers are correct.
