Why does the frequency of action potentials increase when the stimulus intensity increases? Which of the following caused a change in membrane potential from -70 to -40 in the cell body? The variable that affects osmotic pressure is You correctly answered: a. Electrical stimulus-delivers the desired amount and duration of stimulating voltage to the muscle via electrodes resting on the muscle. Activity 8 Review Sheet Results 1. No, it will not affect the transport of either ion. The excess amount must be diffused to reach equilibrium. Where should a dentist inject the lidocaine to block pain perception? Calculate the per hour for this rat using the following equation.
Exercise 1: Cell Transport Mechanisms and Permeability: Activity 5: Simulating Active Transport Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. Which of the following statements about surface tension is false? How well did the results compare with your prediction? Surfactant works by increasing the attraction of water molecules to each other. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Now that you have calculated the oxygen consumption per hour for this rat, you can calculate the metabolic rate per kilogram of body weight with the following equation note that you need to convert the weight data from grams to kilograms to use this equation. How well did the results compare with your prediction? Identify which of the stimulus modalities induced the largest amplitude receptor potential in the olfactory receptors. How well did the results compare with your prediction? Now, read through steps 3—5 before attempting to execute them.
How well did the results compare with your prediction? The results did not support the prediction. It is dependent on the resting permeability of a membrane to the ions Activity2 Review Sheet Results 1. The muscle changing length Will the muscle change length? Which of the following has an epitope? Your answer: The permeability of a membrane to Na+ is low. Count the number of elementary bodies you see through the microscope recall that elementary bodies stain green , enter the number of elementary bodies in the field below, and then click Submit Data to display your results in the grid. There are more negative charges than positive charges just inside the membrane.
Your answer: When extracellular K+ increases, less of it K+ goes into the cell. Surface tension acts to increase the size of the alveoli within the lungs. Each expiration took place over how many seconds? Exercise 2: Skeletal Muscle Physiology: Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. Describe the importance of the washing steps in the direct antibody fluorescence test. Your answer: The high pressure modality induced the largest amplitude receptor potential in the Pacinian corpuscle.
Yes, the reabsorption of solutes affects water reabsorption because water will follow the solutes by osmosis. Lighter the weight the muscle is contracted quicker in both latent and velocity. What is the muscle Maximal tetanic tension tension called at this frequency? Describe what would happen in the following experiment: A 2. Latent phases which is the interval from stimulus application until the muscle begins to contract. It increased for the emphysema patient and decreased for the asthmatic patient. This also helps the offices run smoothly and free from errors. The thyroidectomized Tx rat is You correctly answered: c.
The extracellular Na+ did not alter the membrane potential in the resting neuron because the Na+ channels were mostly closed. After you click Submit Data, the slide will automatically be placed in the biohazardous waste disposal. Which of the following statements about surfactant is false? What are some proposed causes of skeletal muscle fatigue? B Membrane of most cells contains K+ leak channels…. How did neurotransmitter release in the Mg2+ extracellular fluid compare to that in the control extracellular fluid? Contraction phase-which the muscle fibers shorten Relaxation phase- which is the downward curve found in our findings. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. This is because only partial repolarization has occurred, and only a greater than normal stimulus can cause an action potential to occur.
The normal rat is You correctly answered: b. Rather, the frequency or the number of action potentials increases. The best way to rapidly reinflate a person's collapsed lung is toYou correctly answered: a. Count the number of elementary bodies you see through the microscope recall that elementary bodies stain green , enter the number of elementary bodies in the field below, and then click Submit Data to display your results in the grid. Negative What does it mean that the voltage just inside the membrane is negative? The sodium-potassium pump is classified as a n You correctly answered: a. How did the threshold for the second action potential change as you further decreased the interval between the stimuli? Increasing the afferent radius or decreasing the efferent radius would compensate for lowered blood pressure.
Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. How does the threshold voltage change during the relative refractory period? Experiment Data:Radius Breath Rate Surfactant Pressure Left Pressure Right Flow Left Flow Right Total Flow5 15 0 -4 -4 49. The membrane of most cells, including neurons, contains passive, open, K+ leak channels. Your answer: By increasing the extracellular K+ the membrane potential will change to be a less negative value. You may delete these instructions before submission.
The thyroidectomized Tx rat is You correctly answered: a. For a counselor to be effective, McMinn stated throughout the book that it is very…. Explain why the latent period became longer as the load became heavier in the experiment. Define the absolute refractory period. Calculate the oxygen consumption per hour for this rat using the following equation. The diaphragm moves to a flattened position. If the membrane is composed of lipid portion.
