ANATOMY & PHYSIOLOGY V.1 W/CONNECT >IP
7th Edition
ISBN: 9781259722257
Author: SALADIN
Publisher: MCG CUSTOM
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Textbook Question
Chapter 12, Problem 2TYC
Hyperkalemia is an excess of potassium ill the extracellular fluid. What effect would this have on the resting membrane potentials of the nervous system and on neural excitability?
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Students have asked these similar questions
Hyperkalemia is a condition by which ECF potassium levels become too high (usually due to kidney failure). Consider the following questions about the consequence of hyperkalemia on membrane potential.
How would hyperkalemia affect EK?
Considering your answer to the previous question, how would hyperkalemia affect membrane potential?
What ion is the major influence on the resting
membrane
potential? Explain its role.
Which of the following statements is correct with regard to ionic concentrations at
the normal resting membrane potential?
O lower sodium, and higher potassium and chloride inside relative to outside of
neurons.
() higher sodium and potassium, and lower chloride inside relative to outside of
neurons.
lower sodium and chloride, and higher potassium inside relative to outside
neurons
lower sodium, potassium, and chloride inside relative to outside of neurons.
Chapter 12 Solutions
ANATOMY & PHYSIOLOGY V.1 W/CONNECT >IP
Ch. 12.1 - Prob. 1BYGOCh. 12.1 - Prob. 2BYGOCh. 12.1 - Prob. 3BYGOCh. 12.1 - Prob. 1AYLOCh. 12.1 - Prob. 2AYLOCh. 12.1 - Prob. 3AYLOCh. 12.1 - Prob. 4AYLOCh. 12.2 - Prob. 4BYGOCh. 12.2 - Prob. 5BYGOCh. 12.2 - Prob. 6BYGO
Ch. 12.2 - Prob. 7BYGOCh. 12.2 - Prob. 1AYLOCh. 12.2 - Prob. 2AYLOCh. 12.2 - Prob. 3AYLOCh. 12.2 - Prob. 4AYLOCh. 12.2 - Prob. 5AYLOCh. 12.3 - Prob. 8BYGOCh. 12.3 - Prob. 9BYGOCh. 12.3 - Prob. 10BYGOCh. 12.3 - Prob. 1AYLOCh. 12.3 - Prob. 2AYLOCh. 12.3 - Prob. 3AYLOCh. 12.3 - Prob. 4AYLOCh. 12.4 - Prob. 11BYGOCh. 12.4 - Prob. 12BYGOCh. 12.4 - Prob. 13BYGOCh. 12.4 - Prob. 14BYGOCh. 12.4 - Prob. 15BYGOCh. 12.4 - Prob. 16BYGOCh. 12.4 - Prob. 17BYGOCh. 12.4 - Prob. 1AYLOCh. 12.4 - Prob. 2AYLOCh. 12.4 - Prob. 3AYLOCh. 12.4 - Prob. 4AYLOCh. 12.4 - Prob. 5AYLOCh. 12.4 - Prob. 6AYLOCh. 12.4 - Prob. 7AYLOCh. 12.4 - Prob. 8AYLOCh. 12.4 - Prob. 9AYLOCh. 12.5 - Prob. 18BYGOCh. 12.5 - Prob. 19BYGOCh. 12.5 - Prob. 20BYGOCh. 12.5 - Prob. 21BYGOCh. 12.5 - Prob. 1AYLOCh. 12.5 - Prob. 2AYLOCh. 12.5 - Prob. 3AYLOCh. 12.5 - Prob. 4AYLOCh. 12.5 - Prob. 5AYLOCh. 12.5 - Prob. 6AYLOCh. 12.5 - Prob. 7AYLOCh. 12.5 - Prob. 8AYLOCh. 12.5 - Prob. 9AYLOCh. 12.6 - Prob. 22BYGOCh. 12.6 - Prob. 23BYGOCh. 12.6 - Prob. 24BYGOCh. 12.6 - Prob. 25BYGOCh. 12.6 - Prob. 1AYLOCh. 12.6 - Prob. 2AYLOCh. 12.6 - Prob. 3AYLOCh. 12.6 - Prob. 4AYLOCh. 12.6 - Prob. 5AYLOCh. 12.6 - Prob. 6AYLOCh. 12.6 - Prob. 7AYLOCh. 12.6 - Prob. 8AYLOCh. 12.6 - Prob. 9AYLOCh. 12.6 - Prob. 10AYLOCh. 12.6 - Prob. 11AYLOCh. 12.6 - Prob. 12AYLOCh. 12.6 - Prob. 13AYLOCh. 12.6 - Prob. 14AYLOCh. 12 - The integrative functions of the nervous system...Ch. 12 - The highest density of voltage-gated ion channels...Ch. 12 - The soma of a mature neuron lacks a. a nucleus. b....Ch. 12 - The glial cells that fight infections in the CNS...Ch. 12 - Posttetanic potentiation of a synapse increases...Ch. 12 - An IPSP is_____of the postsynaptic neuron. a. a...Ch. 12 - Prob. 7TYRCh. 12 - Prob. 8TYRCh. 12 - Prob. 9TYRCh. 12 - Prob. 10TYRCh. 12 - Prob. 11TYRCh. 12 - Prob. 12TYRCh. 12 - Prob. 13TYRCh. 12 - Prob. 14TYRCh. 12 - Prob. 15TYRCh. 12 - A myelinated nerve fiber can produce action...Ch. 12 - Prob. 17TYRCh. 12 - Prob. 18TYRCh. 12 - Prob. 19TYRCh. 12 - Prob. 20TYRCh. 12 - Prob. 1BYMVCh. 12 - Prob. 2BYMVCh. 12 - Prob. 3BYMVCh. 12 - Prob. 4BYMVCh. 12 - Prob. 5BYMVCh. 12 - Prob. 6BYMVCh. 12 - Prob. 7BYMVCh. 12 - Prob. 8BYMVCh. 12 - Prob. 9BYMVCh. 12 - Prob. 10BYMVCh. 12 - Prob. 1TFCh. 12 - Prob. 2TFCh. 12 - Prob. 3TFCh. 12 - Prob. 4TFCh. 12 - Excitatory postsynaptic potentials lower the...Ch. 12 - Prob. 6TFCh. 12 - Prob. 7TFCh. 12 - Myelinated nerve fibers conduct signals more...Ch. 12 - Prob. 9TFCh. 12 - Prob. 10TFCh. 12 - Schizophrenia is sometimes treated with drugs such...Ch. 12 - Hyperkalemia is an excess of potassium ill the...Ch. 12 - Suppose a poison were to slow down the Na+-K+...Ch. 12 - Prob. 4TYCCh. 12 - Prob. 5TYC
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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
- Conformational 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_forwardAssume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.arrow_forwardIn certain diseases, such as kidney failure, the Na+ concentration in thebody’s extracellular fluid can become altered. What effect might a highextracellular Na+ concentration have on neurons?arrow_forward
- Compare the resting membrane potential of a neuron with the potassium and sodium equilibrium potentials. Explain how this comparison relates to the relative permeabilities of the resting plasma membrane to these two ions.arrow_forwardWhich factors determine the resting membrane potential? Explain why the resting membrane potential is never really the value calculate by the Nernst equation for the potassium equilibrium potential. comments : please answer me in a correct way to hence my knowledge and for my better understandingarrow_forwardDendrotoxins, produced by the mamba snakes (Dendroaspis), are inhibitors of the voltage-gated K+ channels. What phase of the action potential would this toxin affect? How would it affect ion permeability during this phase? How would ion movement be affected?arrow_forward
- If extracellular [Na1] is elevated, how would the resting potential and action potential of a neuron change?arrow_forwardPredict the effect of the poison ouabain (way-BAH-in), which blocks Na+/K+ pumps, on the neuronal action potential. (Hint: What would happen to the sodium and potassium ion gradients?)arrow_forwardExplain why alterations in potassium concentrations have more powerful effects on membrane resting potentials than alterations in sodium ionsarrow_forward
- The compound tetraethylammonium (TEA) blocks the voltage-gated changes in potassium permeability that occurs during an action potential. After administration of TEA, what changes would you expect in the action potential?arrow_forwardDescribe in detail the three types of potentials seen in neurons and functions of three types of potentials.arrow_forwardBased upon the changes in permeability seen in the trace below and your knowledge of ion distributions across a cell, predict how ion movements would change during an action potential. Drag and drop each phrase into the appropriate box on the action potential trace. Drag the appropriate labels to their respective targets. Note: not all labels will be used. ►View Available Hint(s) Sodium (Na+) ions move to the axon Sodium (Na) ions move out of the axon Less potassium (K) ions move out of the axon Potassium (K) ions move out of the axon Potassium (K¹) ions move into the axon Sodium (Na) ions stop moving in Membrane potential (mv) +30 +10 0 -10- -30 -50 -70 -90 A PNa 0 PNa 5 6 1 PK Threshold PK 2 Reset Helparrow_forward
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