Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 7, Problem 38RA
Summary Introduction
To review:
The approximate magnitude of IPSP (Inhibitory postsynaptic potential).
Introduction:
An inhibitory postsynaptic potential can be defined as a temporary hyperpolarization of the post synaptic membrane resulting from the flow of negatively-charged ions inside the postsynaptic cell. This is received in the situation when an inhibitory presynaptic cell which is connected to dendrite, starts firing an action potential. It occurs due to the opening of potassium or chloride channels.
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Based on the graph, how soon could another action potential be easily initiated (at the end of the relative refractory period) after the first stimulus? (Base your answer to this question on the graph below depicting an action potential.)
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Chapter 7 Solutions
Human Physiology
Ch. 7 - Draw a neuron, label its parts, and describe the...Ch. 7 - Distinguish between sensory neurons, motor...Ch. 7 - Describe the structure of the neurilemma, and...Ch. 7 - Explain how myelin sheaths are formed in the CNS....Ch. 7 - Explain what is meant by the blood-brain barrier....Ch. 7 - Define the terms depolarization and...Ch. 7 - Prob. 4bCPCh. 7 - Describe how gating of Na+andK+ in the axon...Ch. 7 - Prob. 5aCPCh. 7 - Prob. 5bCP
Ch. 7 - Prob. 6aCPCh. 7 - Describe the location of neurotransmitters within...Ch. 7 - Describe the sequence of events by which action...Ch. 7 - Explain how chemically regulated channels differ...Ch. 7 - Prob. 8CPCh. 7 - Prob. 9aCPCh. 7 - Prob. 9bCPCh. 7 - Prob. 10CPCh. 7 - Prob. 11CPCh. 7 - Prob. 12aCPCh. 7 - Prob. 12bCPCh. 7 - Prob. 13aCPCh. 7 - Prob. 13bCPCh. 7 - Prob. 14aCPCh. 7 - Describe the mechanism of action of glycine and...Ch. 7 - Give examples of endogenous opioid polypeptides,...Ch. 7 - Prob. 15bCPCh. 7 - Prob. 16CPCh. 7 - Prob. 17aCPCh. 7 - Prob. 17bCPCh. 7 - Prob. 17cCPCh. 7 - Prob. 1RACh. 7 - Prob. 2RACh. 7 - Prob. 3RACh. 7 - Prob. 4RACh. 7 - Repolarization of an axon during an action...Ch. 7 - As the strength of a depolarizing stimulus to an...Ch. 7 - Prob. 7RACh. 7 - Which of these is not a characteristic of synaptic...Ch. 7 - Prob. 9RACh. 7 - Prob. 10RACh. 7 - Prob. 11RACh. 7 - Prob. 12RACh. 7 - Prob. 13RACh. 7 - Prob. 14RACh. 7 - Prob. 15RACh. 7 - Prob. 16RACh. 7 - Prob. 17RACh. 7 - Which of these may be produced by the action of...Ch. 7 - Prob. 19RACh. 7 - In a step-by-step manner, explain how the...Ch. 7 - Prob. 21RACh. 7 - Prob. 22RACh. 7 - Prob. 23RACh. 7 - Prob. 24RACh. 7 - Once an EPSP is produced in a dendrite, how does...Ch. 7 - Prob. 26RACh. 7 - List the endogenous opioids in the brain and...Ch. 7 - Explain what is meant by long-term potentiation...Ch. 7 - Prob. 29RACh. 7 - Prob. 30RACh. 7 - Prob. 31RACh. 7 - Prob. 32RACh. 7 - Prob. 33RACh. 7 - Explain the nature of the endocannabinoids....Ch. 7 - Prob. 35RACh. 7 - Prob. 36RACh. 7 - Prob. 37RACh. 7 - Prob. 38RACh. 7 - Prob. 39RACh. 7 - Use the figure below (from figure 7.34) to answer...
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- Define refractory period, and explain the difference between the absolute refractory period and relative refractory period associated with transmitting an action potential.arrow_forwardIndicate which gate is responsible for halting the rising phase of the action potential. 1- Na+ inactivation gate opens 2- Sodium activation gate closes 3-Na+ inactivation gate closes 4- K+ gate closes 5-Na+ activation gate opensarrow_forwardWhat is the approximate magnitude of the IPSP (how many mV)?What is the approximate magnitude of the EPSP (how many mV)?If the IPSP had not occurred, what would be the difference between the EPSP and the thresholdrequired to produce an action potential?arrow_forward
- Refer to the figure below to explain the mediation of action potentials by neurons using sodium and potassium channels at each of the six timepoints indicated.arrow_forwardFill in the blank: The moment following the passage of an action potential during which a threshold stimulus will not triggeranother impulse is called the ___________________ period.arrow_forwardWhich of the following changes to an action potential indicates a larger stimulus? a. Increased frequency b. Increased wavelength c. Increased amplitude d. Increased speedarrow_forward
- Describe how gating of Na+ and K+ in the axon membrane results in the production of an action potential.arrow_forwardWhat will happen if threshold value for the generation of action potential is not reached?arrow_forwardMC: Which of the following changes to an action potential indicates a larger stimulus? Increased frequency Increased wavelength Increased amplitude Increased speedarrow_forward
- Identify the important physiological structures involved in action potential; then, explain in detail how one nerve action potential causes one muscle action potential.arrow_forwardExplain how stimulus intensity can be coded by action potentials if all action potentials are identical.arrow_forwardDescribe the resting potential for neurons. How is this potential established? Describe the development of the action potential. How does this come about, and what is the function of this phenomenon? Include a diagram of the various stages of the action potential, showing the changes in voltage that occur throughout this phenomenonarrow_forward
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