Human Anatomy
6th Edition
ISBN: 9781260399820
Author: SALADIN, Kenneth
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 13.4, Problem 12BYGO
Summary Introduction
To determine:
The characteristic features that present on the presynaptic neuron but absent from the postsynaptic neuron at a synapse.
Introduction:
Synapse is the meeting point that occurs between the neuron and any other cell. The other cells are epithelial, muscular, glandular, and sensory cells.
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When an impulse arrives at the synapse, the synaptic vesicles open and release neurotransmitters into the cleft within a thousandth of a second. Within another ten thousandth of a second, these molecules have diffused across the cleft and bound to receptor sites in the effector cell. In what two ways is transmission across a synapse terminated so that the neuron’s signal is concluded?
Events at a chemical synapse usually involve opening both voltage-gated ion channels and chemically gated ion channels. Where are these ion channels located and what causes each to open?
Inhibitory postsynaptic potentials cause what type of change at the post-synaptic membrane?
Chapter 13 Solutions
Human Anatomy
Ch. 13.1 - Define receptor and effector. Give two examples of...Ch. 13.1 - Prob. 2BYGOCh. 13.1 - Prob. 3BYGOCh. 13.2 - What basic physiological properties do a nerve...Ch. 13.2 - Prob. 2AWYKCh. 13.2 - Prob. 4BYGOCh. 13.2 - Prob. 5BYGOCh. 13.2 - Prob. 6BYGOCh. 13.2 - Prob. 7BYGOCh. 13.3 - From memory, make your own table of the six kinds...
Ch. 13.3 - Prob. 9BYGOCh. 13.3 - Compare the signal conduction speed in myelinated...Ch. 13.3 - Prob. 11BYGOCh. 13.4 - Of all the methods of membrane transport described...Ch. 13.4 - Prob. 12BYGOCh. 13.4 - Prob. 13BYGOCh. 13.4 - Prob. 14BYGOCh. 13.4 - Prob. 15BYGOCh. 13.4 - Prob. 16BYGOCh. 13.4 - Prob. 17BYGOCh. 13.5 - Prob. 18BYGOCh. 13.5 - Prob. 19BYGOCh. 13.5 - What single adult structure arises from all five...Ch. 13.5 - Prob. 21BYGOCh. 13 - The body’s two principal mechanisms of internal...Ch. 13 - Prob. 13.1.2AYLOCh. 13 - The two divisions of the PNS and the two...Ch. 13 - Prob. 13.1.4AYLOCh. 13 - Prob. 13.2.1AYLOCh. 13 - Prob. 13.2.2AYLOCh. 13 - Prob. 13.2.3AYLOCh. 13 - Prob. 13.2.4AYLOCh. 13 - Prob. 13.3.1AYLOCh. 13 - Prob. 13.3.2AYLOCh. 13 - Prob. 13.3.3AYLOCh. 13 - The structure, composition, and function of the...Ch. 13 - The relationship of Schwann cells to the myelin,...Ch. 13 - Prob. 13.3.6AYLOCh. 13 - Prob. 13.3.7AYLOCh. 13 - How the velocity of a nerve singnal varies with a...Ch. 13 - Prob. 13.3.9AYLOCh. 13 - Prob. 13.4.1AYLOCh. 13 - Prob. 13.4.2AYLOCh. 13 - Three types of synapses defined by where the...Ch. 13 - Prob. 13.4.4AYLOCh. 13 - Prob. 13.4.5AYLOCh. 13 - Prob. 13.4.6AYLOCh. 13 - Prob. 13.4.7AYLOCh. 13 - Prob. 13.4.8AYLOCh. 13 - Prob. 13.4.9AYLOCh. 13 - Prob. 13.4.10AYLOCh. 13 - The four principal types of neural circuits...Ch. 13 - Prob. 13.5.1AYLOCh. 13 - Prob. 13.5.2AYLOCh. 13 - Prob. 13.5.3AYLOCh. 13 - Prob. 13.5.4AYLOCh. 13 - Prob. 13.5.5AYLOCh. 13 - Prob. 13.5.6AYLOCh. 13 - The integrative functions of the nervous system...Ch. 13 - Prob. 2TYRCh. 13 - Prob. 3TYRCh. 13 - Prob. 4TYRCh. 13 - Prob. 5TYRCh. 13 - Prob. 6TYRCh. 13 - Another name for the axon of a neuron is nerve...Ch. 13 - Prob. 8TYRCh. 13 - Prob. 9TYRCh. 13 - Which of the following appears earlier than all...Ch. 13 - Prob. 11TYRCh. 13 - Prob. 12TYRCh. 13 - Prob. 13TYRCh. 13 - Neurons receive incoming signals by way of...Ch. 13 - Prob. 15TYRCh. 13 - Prob. 16TYRCh. 13 - Prob. 17TYRCh. 13 - Prob. 18TYRCh. 13 - Prob. 19TYRCh. 13 - Prob. 20TYRCh. 13 - Prob. 1BYMVCh. 13 - Prob. 2BYMVCh. 13 - State a meaning of each word element and give a...Ch. 13 - Prob. 4BYMVCh. 13 - Prob. 5BYMVCh. 13 - Prob. 6BYMVCh. 13 - Prob. 7BYMVCh. 13 - Prob. 8BYMVCh. 13 - Prob. 9BYMVCh. 13 - Prob. 10BYMVCh. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 2WWWTSCh. 13 - Prob. 3WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Briefly explain why each of the following...Ch. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 7WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 9WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Suppose some hypothetical disease prevented the...Ch. 13 - How would nervous system function be affected if...Ch. 13 - What unusual characteristic of neurons can be...Ch. 13 - Prob. 4TYCCh. 13 - Prob. 5TYC
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- What is a synapse? Explain the difference between an excitatory and an inhibitory synapse.arrow_forwardWhy do neurotransmitters have to be removed from the synapse?arrow_forwardLet’s say the synapses of a neuron’s dendrites are filled with glutamate-gated channels which, when activated by glutamate, cause an excitatory postsynaptic potential (EPSP) in the neuron. In one instance, glutamate is released at all of the synapses simultaneously and this leads to an action potential in the neuron. A) What type of summation of PSPs is this? Why? B) List the sequence of steps that occur starting from binding of glutamate to the glutamate-gated channels at the synapses and ending with the membrane potential at the axon hillock returning to resting potential at the end of the action potential. (Include all the changes in voltage-gated channels underlying the action potential.)arrow_forward
- Which statement is true regarding the neuron synapse? B) binging of a neurotransmitter on the postsynaptic neuron membrane can generate an action potential in that neuron C) the binding of a neurotransmitter always causes an excitatory effect on that cell, never inhibitory D) the presynaptic and pastsynaptic neuron membranes are not physically separatedarrow_forwardWhich of the following statements concerning synapses is FALSE? O A) Modulation of synaptic strength can be presynaptic of postsynaptic B) High frequency stimulation in the presynaptic neuron often leads to DECREASED neurotransmitter release O C) Modulation of synaptic strength can either be short term, lasting seconds, or long term, lasting as long as a lifetime. D) Agonists are drugs that mimic neurotransmitters and antagonists are drugs that block the action of neurotransmitters O E) Certain drugs prevent the reuptake of neurotransmitter from the synapsearrow_forwardWhat is long-term potentiation (LTP) and how does it occur? What changes in the cell should we expect to observe when a synapse is in a "potentiated" state?arrow_forward
- At a synapse, opening one sodium channel (for the normal duration before closing) causes a small depolarization. Opening a handful of sodium channels may cause a larger depolarization. Opening more channels may lead to an even larger depolarization, up to a point. Then the depolarization would be the same regardless of how many other sodium channels opened. Explain why the number of open channels increases the depolarization, and why it doesn’t matter beyond a certain point.arrow_forwardWhat are the two main features of an electrical synapse?arrow_forwardHow is the choice of neurochemical to be released at a synapse determined? A) We don't have enough information to draw conclusions about how this process occurs. B) The postsynaptic structure signals its "choice" to the presynaptic structure. C) The presynaptic structure begins to release its neurochemical onto postsynaptic structures, which adapt by producing the appropriate receptors. D) The "choice" is determined by the genes of both the pre- and postsynaptic cells.arrow_forward
- Neurons, particularly those in the brain, receive multiple excitatory and inhibitory signals. What is the name of the extension of the neuron at which such signals are received? How does the neuron integrate these signals to determine whether or not to generate an action potential?arrow_forwardIn the central nervous system there may be many synaptic inputs on a postsynaptic neurons. How does the postsynaptic neuron respond to the many presynaptic inputs?arrow_forwardBesides the standard post- and pre-synapse that exchange information, non neuronal cell types also play a role in synaptic transmission. One of those are called astrocytes and can form a tripartite synapse. Explain the roles of astrocytes in synaptic transmission.arrow_forward
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