Principles of Anatomy and Physiology
15th Edition
ISBN: 9781119329398
Author: Gerard J Tortora, Bryan Derrickson
Publisher: John Wiley & Sons Inc
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Chapter 12, Problem 24CP
What are the functions of diverging, converging, reverberating, and parallel after-discharge circuits?
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Chapter 12 Solutions
Principles of Anatomy and Physiology
Ch. 12 - l. What is the purpose of a sensory receptor?
Ch. 12 - What are the components and functions of the SNS...Ch. 12 - 3. Which subdivisions of the PNS control voluntary...Ch. 12 - Prob. 4CPCh. 12 - 5. Describe the parts of a neuron and the...Ch. 12 - Give several examples of the structural and...Ch. 12 - 7. What is a neurolemma, and why is it important?
Ch. 12 - 8. With reference to the nervous system, what is a...Ch. 12 - 9. What types of electrical signals occur in...Ch. 12 - 10. Why are voltage-gated channels important?
Ch. 12 - 11. What is the typical resting membrane potential...Ch. 12 - 12. How do leak channels contribute to resting...Ch. 12 - 13. What is a hyperpolarizing graded potential?
Ch. 12 - 14.What is a depolarizing graded potential?
Ch. 12 - What happens during the depolarizing phase of an...Ch. 12 - Prob. 16CPCh. 12 - 17. What effect does miyelination have on the...Ch. 12 - How is neurotransmitter removed from the synaptic...Ch. 12 - Prob. 19CPCh. 12 - Prob. 20CPCh. 12 - Prob. 21CPCh. 12 - Prob. 22CPCh. 12 - What is a neural circuit?Ch. 12 - What are the functions of diverging, converging,...Ch. 12 - What factors contribute to a lack of neurogenesis...Ch. 12 - What is the function of the regeneration tube in...Ch. 12 - The buzzing of the alarm clock woke Carrie. She...Ch. 12 - Prob. 2CTQCh. 12 - As a torture procedure for his enemies, mad...
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- What is a local current? How do local currents cause thepropagation of action potentials in unmyelinated axons?arrow_forwardWhat are the two main features of an electrical synapse?arrow_forwardWhat are the two main factors that influence the conduction speed of an action potential along an axon?arrow_forward
- What does it mean to say a local potential is graded, decremental,and reversible?arrow_forward12) when K+ voltage-gated channels open, which of the following occurs? a) depolarization b) both depolarization and repolarization c) repolarization d) neither deolarization or repolarizationarrow_forwardHow are action potentials propagated along an excitable membrane?arrow_forward
- Action potentials move along different axons at different speeds. The slowest speed of conduction will be found in A) large unmyelinated axons B) small unmyelinated axons C) large myelinated axons D) small myelinated axonsarrow_forwardc) What is the main mechanism contributing to the absolute refractory period in neurons: a) potassium ions can only flow outside the neurons. b) autoreceptors are inhibiting the opening of ionotropic sodium channels, c) the voltage-dependent sodium channels cannot be opened. d) the voltage-dependent potassium channels cannot be opened. e) there are too many sodium ions inside the cell to permit another action potential. f) undershoot hyperpolarizationarrow_forwardThe level of depolarization at which an action potential will be triggered is referred to as the Multiple Choice a) cationic potential. b) membrane potential. c) threshold potential. d) refractory potential. e) resting potential.arrow_forward
- How do depolarize, repolarize, and hyperpolarize describe the direction of changes in the membrane potential relative to the resting potential in an excitable cell?arrow_forwardWhat are the functional advantages and disadvantages of electrical synapses?arrow_forwardWhat effect would a chemical that blocks the voltagegated sodium ion channels in the excitable axon membrane of a neuron have on its ability to depolarize?arrow_forward
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