INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
18th Edition
ISBN: 9781264177875
Author: HICKMAN
Publisher: MCG
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Chapter 33, Problem 8RQ
Summary Introduction
To describe: The cnidarian (radiate) nervous system.
Introduction: The nervous system includes the nerve cell networks involved in transmitting nerve impulses between body parts. A progressive increase observed in the complexity of the nervous system in various animal phyla and this reflects the stages in the nervous system evolution.
Summary Introduction
To explain: How is a tendency toward centralization of the nervous system manifested in arthropods, molluscs, annelids, and
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Which of the following are NOT trends that have occurred during the evolution of the central nervous system in invertebrates?
A)none of the above – all are trends
B)The positioning of nerve chords at the ventral end of the animal
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D)Increasing the size of cerebral ganglia and formation of a “brain”
E)The processing of sensory information by neural ganglia and the generation of motor commands
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Chapter 33 Solutions
INTEGRAT PRINC OF ZOO (LL W/ CONNECT)
Ch. 33 - Define the following terms: neuron, axon,...Ch. 33 - Glial cells far outnumber neurons and contribute...Ch. 33 - The concentration of potassium ions inside a nerve...Ch. 33 - What ionic and electrical changes occur during...Ch. 33 - Explain different ways in which invertebrates and...Ch. 33 - Why is the sodium-potassium pump indirectly...Ch. 33 - Prob. 7RQCh. 33 - Prob. 8RQCh. 33 - Prob. 9RQCh. 33 - Prob. 10RQ
Ch. 33 - Prob. 11RQCh. 33 - Prob. 12RQCh. 33 - Prob. 13RQCh. 33 - Prob. 14RQCh. 33 - Chemoreception in vertebrates and insects is...Ch. 33 - What is the vomeronasal organ and what activity...Ch. 33 - Explain how ultrasonic detectors of certain...Ch. 33 - Outline the place theory of pitch discrimination...Ch. 33 - Explain how the semicircular canals of the ear are...Ch. 33 - Contrast the structure and functioning of the...Ch. 33 - Explain what happens when light strikes a...Ch. 33 - Prob. 22RQCh. 33 - Prob. 1FFT
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- What are the noteworthy features of the nervous system of arthropods?arrow_forwardWhat is an unusual feature of the nervous network of cnidarians?arrow_forwardHow is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes?arrow_forward
- 1) Hearing in sauropsids differs from that in synapsids in that sauropsids _____ . A) can hear a larger range of frequencies than synapsids B) have longer cochlea than synapsids C) have only one ear ossicle whereas synapsids have 3 D) have only 2 semicircular canals whereas synapsids have 3 E) use their air bladders to assist with sound conductionarrow_forwardIn tetrapods, the efferent nerves exit the spinal cord through the Question 2 options: A) Ventral root B) Paleopallium C) Dorsal root D) Neopallium E) Archipalliumarrow_forwardMany neurotoxins have been used extensively in physiological studies of neurons. When comparing tetrodotoxin found in puffer fish and batrachotoxins from poison dart-frogs, the former had no effect on a neurons resting potential but completely stopped its action potential, whereas the later toxin immediately initiates depolarization of a neuron but prevents repolarization. Can your group hypothesize how these toxins affect the nerve transmission differently?arrow_forward
- Are nematodes diploblastic or triploblastic animals?arrow_forwardChoose the manipulation most likely to disrupt the complex behaviors of earthworms. Destruction of the nerve net in the head region Destruction of the anterior ganglia Blocking communication among neurons in the ganglia of posterior segments Severing the dorsal nerve cord in the region of the head Blocking communication between the dorsal nerve cord and efferent neurons leading to muscles.arrow_forwardExplain the following. Salamanders can regenerate limbs, but only under certain conditions. a) What is the effect of denervation on regeneration of a salamander limb? b) What is the role of the nerve supply? c) What protein can substitute for the nerves in enabling regeneration? d) Why can a limb that has never been innervated regenerate?arrow_forward
- The animal you are dissecting possesses several ganglia. Several are located at the head. Others are located at segments along a nerve cord. Under what phylum would this animal likely be classified? A)Echinodermata B)Platyhelminthes C)Cnidaria D)Arthropoda E)Molluscaarrow_forwardDescribe the nervous system of Meerkats, vampire squid and black drongo, and how their communication along and between the neurons.arrow_forwardDescribe the roles of and differentiate between the divisions of the vertebrate nervous system (afferent, efferent, somatic, autonomic, sympathetic, parasympathetic).arrow_forward
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