Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 9, Problem 31RA
Refer to table 7.3 to obtain axon diameters and conduction rates. Given that a rate of l m/sec is equal to 2.24 mph, answer the following questions.
How much faster does a somatic motor axon of average thickness conduct action potentials compared to a postganglionic autonomic axon of average thickness?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In Neurology, please explain the relationship between suprathreshold depolarization and induced electrical neuro transmission. Is suprathreshold depolarization essential for inducing the electrical transmission?please explain in a few sentences.
Describe the direction of action potential propagation relative to the CNS in the spinal nerves, dorsal roots, and ventral roots.
List some of the responses stimulated by the autonomic nervous system in (a) a person who is extremely angry and (b) a person who has just finished eating and is now relaxing.
The thalamus has been described as a “switchboard.” Explain why, by describing the pathway of somatic sensory information from the receptors to the cerebral cortex.
Describe the organization of autonomic motor neurons.
Describe the structure of the sympathetic and parasympathetic divisions of the autonomic system
Distinguish between the different types of adrenergic receptors and state where these receptors are located in the body.
Explain what is meant by nicotinic and muscarinic Acetylcholine receptors and describe where these receptors are located in the body.
Explain the mechanisms involved when a person blushes. What structures are involved in this response?
Analytical Question:
Case Study:
Princess Leia has asthma, and had to use her inhaler before taking her physiology exam. Later, in the physiology laboratory, she measured her pulse rate and blood pressure and found them to be higher than usual. The following week, after administering some…
Chapter 9 Solutions
Human Physiology
Ch. 9 - Describe the preganglionic and postganglionic...Ch. 9 - Compare the control of cardiac muscle and smooth...Ch. 9 - Describe the sympathetic pathway from the CNS to...Ch. 9 - Prob. 4CPCh. 9 - Prob. 5CPCh. 9 - Prob. 6CPCh. 9 - Prob. 7CPCh. 9 - Prob. 8CPCh. 9 - Explain how the effects of the sympathetic and...Ch. 9 - Prob. 1RA
Ch. 9 - Prob. 2RACh. 9 - Prob. 3RACh. 9 - Prob. 4RACh. 9 - Which of these fibers release norepinephrine? a....Ch. 9 - Prob. 6RACh. 9 - Prob. 7RACh. 9 - Prob. 8RACh. 9 - Prob. 9RACh. 9 - Prob. 10RACh. 9 - Prob. 11RACh. 9 - A drug that serves as an agonist for ai receptors...Ch. 9 - Prob. 13RACh. 9 - Prob. 14RACh. 9 - Compare the effects of adrenergic and cholinergic...Ch. 9 - Prob. 16RACh. 9 - Prob. 17RACh. 9 - Prob. 18RACh. 9 - Prob. 19RACh. 9 - Prob. 20RACh. 9 - Prob. 21RACh. 9 - Prob. 22RACh. 9 - Prob. 23RACh. 9 - Prob. 24RACh. 9 - Prob. 25RACh. 9 - Prob. 26RACh. 9 - Prob. 27RACh. 9 - Prob. 28RACh. 9 - Prob. 29RACh. 9 - Prob. 30RACh. 9 - Refer to table 7.3 to obtain axon diameters and...
Knowledge Booster
Learn more about
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
- Name the following parts of the neuron as indicated. Specify the functions of each part. 1 7 2 5 4 3 Illustrate and explain the reflex arc. Illustrate and explain transmission of neuronal impulses across synapse.arrow_forwardThe cell bodies of autonomic postganglionic neurons are found in ANS ganglia. The cell bodies of another class of neuron are also found in ganglia (but not ANS ganglia). What are these other ganglia called? Determine the structural and functional classification of the neurons found in these other ganglia.arrow_forwardDescribe the structure of the neuroeffector junction at which postganglionic autonomic neurons innervate their target organsarrow_forward
- In the figure to the left, name the 4 phases of the action potential (Note: you have to write in where phase 4 occurs). Describe what happens in each phase with a focus on Na+ and K+ flow through channels and the membrane potential. Discuss the importance of threshold. How does this relate to the concept of APs being all or none?arrow_forwardImmediately after the repolarization phase of an action potential, the neuronal membrane is temporarily unable to respond to the stimulation of a second action potential, a phenomenon referred to as the refractory period. What is the mechanistic basis for the refractory period?arrow_forwardName the types of autonomic synapse in terms of neurotransmitter used; are they excitoratory, inhibitory, or can be both? (such as Adrenergic, Muscarinic, and Nicotinic)arrow_forward
- 1) A 100-um diameter nerve axon has the following properties: rm = 2.5 x 104 ohm x cm, ri = 1 x 105 ohm/cm, r0 = 0, cm = 3 x 10-8 F/cm. The permeability to Cl- is very high and Cl- ions are at resting potential Vm. A steady inward current is injected into the axon resulting in a Vm of -110 mV at the site of current injection. If the Vm 3 mm from the site of injection is -94.5 mV, what is the resting Vm?arrow_forwardList the three neurotransmitters involved in the basal ganglia and explain their role.arrow_forwardA. Is an action potential more or less likely when the consumption of the Fugu toxin and is stimulated with a neuron with a supra-threshold stimulus? B. Which (flaccid or tonic) is the result in this case? What would be the associated physical symptoms of this condition? C. Briefly describe the pharmacological/clinical/commercial uses of this toxin and its derivatives.arrow_forward
- Compare the location of the ganglia and the junction ofPNS and SNS peripheral nerve fibers with those in theCNS.arrow_forwardAssume that two nerves fibers have the same diameter, but one is myelinated and the other is unmyelinated. The conduction of an action potential is most energy-efficient along which type of fiber?arrow_forwardThere are two divisions of the autonomic nervous system: Sympathetic and parasympathetic Describe 5 effects of parasympathetic activation. How does this help the body return to normal activities after exertion?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Nervous System - Get to know our nervous system a bit closer, how does it works? | Neurology; Author: FreeMedEducation;https://www.youtube.com/watch?v=6O-0CVAgaEM;License: Standard youtube license