
All of the following characterize the ANS except (a) a two-neuron efferent chain, (b) presence of neuron cell bodies in the CNS, (c) presence of neuron cell bodies in the ganglia, (d) innervations of skeletal muscles.

To determine:
All of the following characterize the Autonomic Nervous System (ANS) except
a two-neuron efferent chain,
presence of neuron cell bodies in the CNS,
presence of neuron cell bodies in the ganglia,
innervation of skeletal muscles.
Answer to Problem 1MC
Correct answer:
(d) Innervation of skeletal muscles
Explanation for the correct answer:
Option (d) is given as innervations of skeletal muscles. The ANS (autonomic nervous system) is classified as a portion of the PNS (peripheral nervous system) that provides smooth muscles and glands and influences the activity of the internal organs. It is a unique system that needs a sequential two-neuron efferent pathway. It consists of cell bodies and these bodies have neurons in the CNS (central nervous system) and ganglia. Hence, option (d) is the correct option.
Explanation of Solution
Explanation for the incorrect answers:
Option (a) is given as a two-neuron efferent chain. The autonomic nervous system (ANS) is unique as it requires a sequential two-neuron efferent pathway; the preganglionic neuron must first cross a synapse onto a postganglionic neuron before innervating the target organ. Hence, option (a) is an incorrect option.
Option (b) is given as a presence of neuron cell bodies in the CNS. Neuron cell bodies are a junction between autonomic nerves originating from the central nervous system and autonomic nerves innervating their target organs in the periphery. Hence, option (b) is an incorrect option.
Option (c) is given as a presence of neuron cell bodies in the ganglia. In ganglia, cell bodies of afferent nerves (input nerve fibers) and efferent nerves (output/motor nerve fibers), or axons are present. Ganglia is located in the autonomic nervous system and sensory system. Hence, option (c) is an incorrect option.
ANS is characterized by a two-neuron efferent chain, presence of neuron cell bodies in the CNS and the ganglia.
Want to see more full solutions like this?
Chapter 14 Solutions
Anatomy & Physiology (6th Edition)
- Plating 50 microliters of a sample diluted by a factor of 10-6 produced 91 colonies. What was the originalcell density (CFU/ml) in the sample?arrow_forwardEvery tutor here has got this wrong, don't copy off them.arrow_forwardSuppose that the population from question #1 (data is in table below) is experiencing inbreeding depression (F=.25) (and no longer experiencing natural selection). Calculate the new expected genotype frequencies (f) in this population after one round of inbreeding. Please round to 3 decimal places. Genotype Adh Adh Number of Flies 595 Adh Adh 310 Adhs Adhs 95 Total 1000 fladh Adh- flAdn Adh fAdhs Adharrow_forward
- Which of the following best describes why it is difficult to develop antiviral drugs? Explain why. A. antiviral drugs are very difficult to develop andhave no side effects B. viruses are difficult to target because they usethe host cell’s enzymes and ribosomes tometabolize and replicate C. viruses are too small to be targeted by drugs D. viral infections usually clear up on their ownwith no problemsarrow_forwardThis question has 3 parts (A, B, & C), and is under the subject of Nutrition. Thank you!arrow_forwardThey got this question wrong the 2 previous times I uploaded it here, please make sure it's correvct this time.arrow_forward
- This question has multiple parts (A, B & C), and under the subject of Nutrition. Thank you!arrow_forwardCalculate the CFU/ml of a urine sample if 138 E. coli colonies were counted on a Nutrient Agar Plate when0.5 mls were plated on the NA plate from a 10-9 dilution tube. You must highlight and express your answerin scientific notatioarrow_forwardDon't copy off the other answer if there is anyarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningAnatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax CollegeHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning





