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Given that cell A has significantly more negated K+ channels than cell B, which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B, then the resting membrane potential (RPM) will be closer to the equilibrium potential in cell A, which meaner the RPM will be more negative in cell A than in cell B; or in other words, the potential difference will be LARGER in cell A. 2.Predict the effect of a reduced extracurricular concentration of An+ on the magnitude f the action potential in an electrically excitable cell.

If there is less An outside the cell, the equilibrium potential for An will be less (for example, it will be +map instead of +map). And the action potential will be smaller in amplitude (smaller magnitude) since it will deplorable to only +map instead of +map. 3. If the breakdown of Rhodesia occurs rapidly and production is slow, do eyes adapt more rapidly to light or dark conditions? Explain.Eyes adapt more quickly to bright light because this involves only a change in the conformation of retinal, which happens ere quickly. In order to adapt to dark conditions, a lot of Rhodesia (retinal+poops) needs to build up and that takes time. 4.

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If the duration of the absolute refractory period of a nerve cell is 1. Emcees, how many a. P. Are generated in Sec by a maximal stimulus? If you can fire an action potential every 1. Emcees, then you should be able to generate (emcees 0 1.

5 muse) or about 667 a. P. S per second.

5.Betrothal chloride is a drug that binds to musician receptors. Explain why this drug can be used to promote emptying of the urinary bladder.

Which of the following side effects would you predict: abdominal cramps -YES, asthmatic attack -YES, decreased tear production, decreased salivation, dilation of the pupils, or sweating -YES 6. You suspect your patient has developed a peripheral enumerator due to diabetes mellitus. You are going to measure the nerve conduction velocity along the median nerves in both the left and right forearms.The distance between the stimulating and recording electrodes is 14 CM. You record the delay between the time the stimulus is applied and the time the action potentials reach the recording electrodes as the “latency’.

Complete the table below and determine if some enumerator has occurred. The conduction velocity of the action potential is determined by measuring the distance traveled (length of the nerve in m) and dividing by the time (sec) taken to complete the reflex arc, also called the latency. Conduction velocity = distance (m)/time (sec).

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