EBK HUMAN PHYSIOLOGY
15th Edition
ISBN: 8220106796238
Author: Fox
Publisher: YUZU
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Chapter 9, Problem 30RA
Summary Introduction
To review:
The rate of conduction of a postganglionic axon of average thickness.
Introduction:
The fibers originating from the ganglion and going toward the effector organs are called as the postganglionic fibers. These neurons are largely responsible for the alterations in the activity of the effector organ through certain biochemical changes as well as the release of neurotransmitter.
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Chapter 9 Solutions
EBK 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...
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- The 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 sympathetic vasomotor tone: its origin, the neurotransmitter and receptor responsible for the effect. What is the physiological significance of the sympathetic tone?arrow_forwardFor each of the following indicate either: somatomotor, sympathetic, and parasympathetic A. long preganglionic neurons B. cranial nerves C. muscarinic recpetors at targetarrow_forward
- Which number represents postganglionic fibers?arrow_forwardSympathetic and parasympathetic preganglionic fibers release the neurotransmitter:arrow_forwardDefine the refractory period in the propagation of action potential in two sentences. Give its importance then differentiate absolute and relative refractory period.arrow_forward
- What causes the membrane potential to steadily depolarize to threshold with no ANS input? (please let answer be short. 3-4 sentences should suffice)arrow_forwardIn 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_forwardnerve axon has an absolute refractory period of 0.6 ms and a relative refractory period of 0.8 ms, explain what will happen if an action potential is elicited at the following time periods after the original action potential is produced at time equal to zero.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_forwardDefine somatotropinarrow_forwardIn the sympathetic division of the autonomic nervous system: Select one: The ratio between the number of postganglionic and preganglionic neurons is small. A single preganglionic neuron usually synapses with a single postganglionic neuron. An important functional characteristic is convergence of the preganglionic fibers. Preganglionic fibers are usually much longer than the postganglionic fibers. Activity of the neurons tends to have a more generalized and widespread effect on the body.arrow_forward
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