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- The 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?During your lab session, you looked at how the internal stimulator is set up to deliver a stimulus voltage to tissue like skeletal or cardiac muscle to cause it to contract, The 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? Stimulator - Document1 Output: Pulse Stmulate Max Repeat Rate Pulse Height Pulse Width 15 Hz 0.1 O 15 Hz 5 Hz 0.1 HzReceptors such as those in the inner ear, respond to stimulation with an AM response. In contrast, a neuron connected to that receptor, sending information centrally (ex: the brain) respond in an FM manner. Differentiate between: I. how the degree of stimulation to the receptor is encoded as compared to, II. the degree of the stimulation encoding by the neuron connected to the receptor
- 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 repolarization* Question 3: You think you have discovered a new neurotransmitter, and you are studying its effect on a neuron. The reversal potential for the response caused by the new chemical is-60 mV. Is this substance excitatory or inhibitory? Why? Question 4: How does nerve gas cause respiratory paralysis? Focus 78°F Mostly cloudy O F hp f1 PPI 14 11 $ 4 % 5 i 10 6 & 7 18 R T Y F G H C V B N U ◄+ * 8 J ( K M fio O L P + {Three currents are produced by a 56 mV depolarization leading to an action potential in a squid axon membrane during a voltage clamp experiment as shown. What is the mechanism underlying the capacitive current? 56 mV Depolarization Capacitative current Late current Early current Time (ms) Opening of Na* channels Current due to the Na/K* pump O Neutralization of the charge on the membrane Opening of K channels Membrane Membeane current imA/cm potential (mV)
- No. Response 1 2 3 4 5 Question Which of these would be most likely to stimulate a mechanoreceptor? A. A signal molecule binding B. Physical distortion of cells C. A photon of light D. Cold temperature E. An odorant molecule Which of these would be most likely to stimulate a chemoreceptor? A. An odorant molecule B. Physical distortion of cells C. Vibration D. Cold temperature E. Hot temperature All sensory pathways except olfaction first travel to the, which acts as a relay and processing station. A. Cerebrum B. Thalamus C. Cerebellum D. Pons E. Medulla oblongata Convergence describes how multiple presynaptic sensory neurons synapse on one post-synaptic neuron. Which of the following is the most likely result? A. A stronger stimulus intensity is needed to activate the sensory receptors. B. Incoming stimuli will not be processed in the CNS. C. The individual receptive fields for the presynaptic sensory neurons overlap to form a secondary receptive field. D. Sensory transduction will not…d. Much of the experimental research on the propagation of nerve signals has focused on an especially large axon found in the squid. The axon's Nernst potential for K+ ions is -115 mV at a temperature of 15°C. The ion concentration outside the axon is 2.0 mm. What is the concentration inside the axon? 0.02 mM ii. 140 mM iii. 200 mM iv. 8000 mM Explanation:Which of the following are mechanisms of gustation transduction? Select one or more: a. Hydrogen atoms activate proton channels b. Sodium ions activate sodium channels and a graded potential is produced c. Entry of sodium and calcium causes the cell to depolarize and voltage-gated calcium channels to open d. Calcium ions activate calcium channels and a graded potential is produced
- Ultrasound imaging depends on the creation and detection of ultrasound pulses by a transducer placed in contact with the patient’s body. Explain the process leading from the emission of an ultrasound pulse by the transducer to the acquisition of echo data which can lead to the production of an image. Suggested word count 300.Which type of summation REQUIRES convergence? A temporal summation spatial summation C both require convergenceIn your own words what is Matthew effect.
