ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
4th Edition
ISBN: 9781265521363
Author: McKinley
Publisher: MCG
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Question
Chapter 12.4, Problem 12WDYL
Summary Introduction
To explain:
The specific type of glial cells that ensheath the axons in the PNS.
Concept introduction:
Neural tissue involves two types of cells: neurons and neuroglia. Neuroglia or glial cells are the supporting cells of the nervous system. These cells protect neurons from damage and provide a protected environment.
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Which kind of glia cell wraps around the synaptic terminals of axons?
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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?
Chapter 12 Solutions
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
Ch. 12.1 - Prob. 1WDYLCh. 12.1 - Prob. 2WDYLCh. 12.1 - Prob. 3WDYLCh. 12.2 - Prob. 4WDYLCh. 12.2 - Prob. 5WDYLCh. 12.2 - Prob. 6WDYLCh. 12.2 - Prob. 7WDYLCh. 12.2 - Prob. 8WDYLCh. 12.3 - Prob. 9WDYLCh. 12.4 - If a person has a brain tumor, is it more likely...
Ch. 12.4 - Prob. 11WDYLCh. 12.4 - Prob. 12WDYLCh. 12.4 - Prob. 13WDYLCh. 12.5 - Prob. 14WDYLCh. 12.5 - Prob. 15WDYLCh. 12.6 - Prob. 16WDYLCh. 12.6 - Prob. 17WDYLCh. 12.7 - Prob. 18WDYLCh. 12.7 - Prob. 19WDYLCh. 12.7 - Prob. 20WDYLCh. 12.8 - How are EPSP and IPSP graded potentials...Ch. 12.8 - Prob. 22WDYLCh. 12.8 - How does depolarization and repolarization occur...Ch. 12.8 - Prob. 24WDYLCh. 12.8 - Prob. 25WDYLCh. 12.9 - Prob. 26WDYLCh. 12.9 - Prob. 27WDYLCh. 12.9 - Prob. 28WDYLCh. 12.10 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - Prob. 1DYKBCh. 12 - Prob. 2DYKBCh. 12 - Prob. 3DYKBCh. 12 - Prob. 4DYKBCh. 12 - Prob. 5DYKBCh. 12 - Prob. 6DYKBCh. 12 - _____ 7. An action potential is generated when...Ch. 12 - Prob. 8DYKBCh. 12 - Prob. 9DYKBCh. 12 - Prob. 10DYKBCh. 12 - What are the four structural types of neurons? How...Ch. 12 - Prob. 12DYKBCh. 12 - How does myelination differ between the CNS and...Ch. 12 - Describe the procedure by which a PNS axon may...Ch. 12 - Prob. 15DYKBCh. 12 - Prob. 16DYKBCh. 12 - Explain summation of EPSPs and IPSPs and the...Ch. 12 - Graph and explain the events associated with an...Ch. 12 - Prob. 19DYKBCh. 12 - Prob. 20DYKBCh. 12 - Prob. 1CALCh. 12 - Prob. 2CALCh. 12 - Prob. 3CALCh. 12 - Prob. 4CALCh. 12 - Sarah wants to call her new friend Julie and needs...Ch. 12 - Over a period of 6 to 9 months, Marianne began to...Ch. 12 - Prob. 2CSLCh. 12 - Prob. 3CSL
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- Which component of the neuron sends action potentials away from the cell body?arrow_forwardWhich functional segment of a neuron contains chemically gated channels? Which functional segments contain voltage-gated channels?arrow_forwardWhich two types of neuroglia form insulating coverings called myelin sheaths?arrow_forward
- What happens when the activation gates in the voltagegated Na+ channels open and the inactivation gatesclose?arrow_forwardWhy are chemically- sensitive gated channels associated with receptors at the synapse and voltage-sensitive channels found along the axon?arrow_forwardHow does a signal cross the synaptic cleft?arrow_forward
- How do depolarization and repolarization occur in the conductive segment of a neuron?arrow_forwardDo Excitatory Potentials (EPSPs) and Inhibitory Potentials (IPSPs) only come into play at the synapses due to the NT's that bind to receptors on post-synaptic cell? And if an action potential is fired in the post-synaptic cell will it propagate from node to node dependent of this concept or do EPSPs and IPSPs come into play at each section of the axon?arrow_forwardWhich type of neuroglia controls the extracellular fluid environment around neuron cell bodies in the CNS? In the PNS?arrow_forward
- a) How does E allow faster transmission of signals? b) What would happen if G has a lack of Calcium? c) Most neurons have the style of junction (chemical) shown in the diagram, rather than gap (electrical) junctions. Why does this make sense?arrow_forwardWhat is the role of calcium in neuronal communication at the axon terminal? What would be prevented if calcium channels could not open here in the terminal?arrow_forwardWhy are synaptic vesicles present in axon but not in dendrites?arrow_forward
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