When the stimulus intensity is increased, what changes: With a light load, the shortening velocity is at its Maximal shortening velocity. What is the relationship between the interspike interval and the frequency of action potentials?
The increase of electrical current causes a progressive increase in the amount of muscle force based on the amount of the electrical current. Describe what happened when you applied a moderate stimulus was to the sensory receptor.
This is also due to the binding that lidocaine does to the voltage-gated sodium channels. If you were using your bicep muscles to curl a 7-kg dumbbell, when would your muscles be contracting isotonically?
Drag the next slide positive control to the fluorescent microscope.
List and describe some possible causes of metabolic alkalosis, i. In this experiment the the 3 axons had either heavy, light or no myelination. Why does the frequency of action potentials increase when the stimulus intensity increases?
These results compare with my prediction that there would be no change in potential. When your arm extends downwards to the point of it being straight. Why did the time between the stimulation and the action potential at R1 differ for each axon?
How are they similar? Cross bridges cycle and when the muscle tension exceeds the load, muscle shortening happens. These regions would depend on where the pain of the procedure will occur and where the nociceptors are located.
Since the intensity is increasing there is more time allowed for the neuron to generate the action potential and recover and then generate a second action potential and so on.
Refractory period is the time that immediately follows stimulation of the nerve.
This was not predicted in the experiment, instead I predicted that there would be the same conduction velocity. When a strong stimulus was applied to the sensory receptor action potentials were generated at all 4 of the locations. In the serology test just performed, the fluorescence is found on the You correctly answered: Describe what happened to the concentration of ions in the urine when the blood PCO2 was lowered.
Describe how the shortening distance changed as the load became heavier in this experiment. Active force is generated from myosin thick filaments bind to thin actin filaments, engaging the cross bridge cycle and ATP hydrolysis.
What is the muscle tension called at this frequency? What happens to the amount of total force the muscle generates during the stimulated twitch?
How well did the results compare with your prediction? Explain how the renal system can compensate for respiratory acidosis. Although I selected moderate-intesity pressure, which was not the highest amplitude value but second highest, this value was still higher than stimulus caused by chemicals, heat or light which were the other answers in the question.
This was not what was predicted in the experiment, instead I predicted that the threshold would not change even if the intervals were decreased.
Define the absolute refractory period. Since the conduction velocity was being altered to become slower a time scale that was longer was required.
If a nerve, rather than an axon, had been used in the lidocaine experiment, the responses recorded at R1 and R2 would be the sum of all the action potentials called a compound action potential.
Why is it harder to generate a second action potential during the relative refractory period? When the resting length of the muscle is shortened, the active force amount increases.
When a skeletal muscle fatigues the contractile force declines due to previous contractile activity. The time between the stimulation and the action potential at R1 differ for each axon as a result of the amount of myelination.
Since they are at resting potential there is nothing to stimulate, therefore they have the same value. Specifically, what happened to the muscle force generated with stronger electrical stimulations and why did this change occur? When the stimulus is increased the number of synaptic vesicles released is increased with the intensity.Stop & Think Questions: The reason none of the solutes were present in the filtrate was that You correctly answered: b 05/18/13 page 10 10 10 10 20 20 20 20 Residue present present present present present present present present present present present present present 5/5(1).
PhysioEx: 9 - Exercise 10 Acid / Base Answers for Activity 1 - 4. PhysioEx Exerciese Activity 1 - Hyperventilation 1. Which of the following is NOT one of the body's physiological chemical buffering systems? Hydrochloride 2. Which of the following has the greatest capacity for pH change in the body?
Start studying PhysioEx Exercise 4. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Learn physioex 9 with free interactive flashcards. Choose from 54 different sets of physioex 9 flashcards on Quizlet.
Exercise 2 Skeletal Muscle Physiology The Muscle Twitch and the Latent Period 1 - Physiolab Exercise 2 introduction. Define the terms skeletal muscle fiber, motor unit, skeletal muscle twitch, electrical stimulus, and latent period. Motor unit- single? motor neuron and all of the corresponding muscle fibers it innervates; all of these fibers will.
View Lab Report - lab 3 Physioex from BSC C at Florida State College at Jacksonville. PHYSIOEX REVIEW SHEET EXERCISE 1 Cell Transport Mechanisms and %(4).Download