<LCPO> BIOLOGY
12th Edition
ISBN: 9781266216398
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 42, Problem 2S
Describe the status of the Na+ and K+ channels at each of the following stages: rising, falling, and undershoot.
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Describe the action potential in terms of the different functional states of the voltage- gated Na+ membrane channels (Note: there are three states)
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Chapter 42 Solutions
<LCPO> BIOLOGY
Ch. 42.1 - Differentiate between subdivisions of the...Ch. 42.1 - Prob. 2LOCh. 42.1 - Explain the roles of the different nervous system...Ch. 42.2 - Contrast the relative concentrations of important...Ch. 42.2 - Prob. 2LOCh. 42.2 - Prob. 3LOCh. 42.3 - Prob. 1LOCh. 42.3 - Prob. 2LOCh. 42.3 - Prob. 3LOCh. 42.4 - Prob. 1LO
Ch. 42.4 - Prob. 2LOCh. 42.4 - Prob. 3LOCh. 42.5 - Describe the organization of the peripheral...Ch. 42.5 - Prob. 2LOCh. 42.5 - Prob. 3LOCh. 42.5 - Prob. 4LOCh. 42 - Data analysis Draw the resulting potentials for...Ch. 42 - Prob. 2DACh. 42 - Which of the following best describes the...Ch. 42 - The ____ cannot be controlled by conscious...Ch. 42 - Prob. 3UCh. 42 - Inhibitory neurotransmitters a. hyperpolarize...Ch. 42 - White matter is ______, and gray matter is...Ch. 42 - During an action potential a. the rising phase is...Ch. 42 - Prob. 7UCh. 42 - Imagine that you are doing an experiment on the...Ch. 42 - The Na+/K+ ATPase pump is a. not required for...Ch. 42 - Prob. 3ACh. 42 - The following is a list of the components of a...Ch. 42 - Prob. 5ACh. 42 - As you sit quietly reading this sentence, the part...Ch. 42 - G proteincoupled receptors are involved in the...Ch. 42 - Tetraethylammonium (TEA) is a drug that blocks...Ch. 42 - Describe the status of the Na+ and K+ channels at...Ch. 42 - Describe the steps required to produce an...Ch. 42 - Prob. 4S
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Describe the potassium and sodium equilibrium potentials.arrow_forwarda) Explain in detail what is occurring at stage A in the graph. (Be specific in terms of what's happening to the ion channels in your explanation if necessary!) b) What does this graph represent as a whole? Explain the main idea it portrays. +40| -70- A 1 2 4 Time/ms Potential Difference/mV Barrow_forwardDescribe the three states of voltage-gated Na+ channels in neurons.arrow_forward
- Explain the absolute and relative refractory periods in terms of Na+ & K+ gates and conductivities?arrow_forwardDescribe the ion movement across the cell membrane during the following stages: resting potential, threshold potential, depolarization, repolarization.arrow_forwardAt the peak of an action potential, would the relative permeability of Na be higher than K? Which ion would be the least permeable to the membrane during falling phase?arrow_forward
- Severe burns, particularly third-degree burns that damage a significant portion of the body surface, can result in the release of sodium from damaged cells into the bloodstream leading to hypernatremia. Note: Words with the suffix '-emia' generally indicate a presence of a substance or condition in the blood. Question: Based on this information, which of the following statement/s is/are true? ☐ Hypernatremia would lead to a greater Na* influx through voltage-gated Na* channels. This increased Na* influx would cause the cell to reach threshold faster and increase cell excitability. ☐ Hypernatremia can result in more negative resting membrane potential due to the reduced efflux of Na+ ions. Consequently, this may lead to a decrease in the rate of action potential generation in excitable cells. Hypernatremia can result in a more positive resting membrane potential due to the increased influx of K+ ions. Consequently, this may lead to a decrease in the rate of action potential generation…arrow_forwardDescribe the role of the potassium leak channel and the sodium- potassium pump in resting membranme potential.arrow_forwardexplain the mechanism of vesicular trafficarrow_forward
- Contrast the somatic and autonomic divisions of the efferentnervous system; mention at least three characteristics of each?arrow_forwardList the Forces influencing sodium and potassium ions at the resting membrane potential?arrow_forwardConformational changes in channel proteins brought about by voltage changes are responsible for opening and closing Na+ and K+ gates during the generation of an action potential. (True or false?)arrow_forward
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