Concept explainers
The organization of an organism’s nervous system correlates with how the animal interacts with its environment. How do the different nervous systems of clams and squid illustrate this generalization?
To determine: The way in which the different nervous systems of clams and squid interact with its environment.
Introduction: The nervous system controls and coordinates all the activities of the animals. The squids have the more sophisticated nervous system, while the clams have a relatively simple nervous system.
Explanation of Solution
In the animal group, the organization of nervous system often correlates with the environment. Sessile and slow-moving molluscs such as clams have little cephalization and simple sense organs. The active predatory cephalopod molluscs such as squid have the sophisticated nervous system of any invertebrate. They contain a large image forming eyes, and brain with millions of neurons, which correlate with their environment as well as with their learning ability.
Want to see more full solutions like this?
Chapter 49 Solutions
Study Guide for Campbell Biology
- Describe the nervous system of Meerkats, vampire squid and black drongo, and how their communication along and between the neurons.arrow_forwardElaborate networks of neuronal processes that characterize the nervous system and how does it depend upon the outgrowth of specific axons to specific targets?arrow_forwardexplain how nervous systems it evolved in humans in comparison to one lower organismarrow_forward
- What is the role of the nervous system in animals?arrow_forwardWhich is an incorrect statement about simple nerve nets? a- Neurons are randomly poisoned relative to one another. b- They control the contraction and expansion of the gastrovascular cavity. c- They don’t contain nerves. d- They are organized into ganglia.arrow_forwardWhich of the following is NOT a characteristic of the function of the vertebrate nerve cell/ nervous system? a) nerve cells keep the levels of Na + and k+ AT Equilibrium on both sides of the cell membrane at all times b) Nerve cells produce impulses that release neurotransmitters to stimulate other cells C) Nerve cells generate motor output (movement) d) nerve cells use neurotransmitters to regulate other cells e)nerve cells are speacialized in employing specific receptors to react to a specific stimulusarrow_forward
- Draw and explain the concept map of the nervous systemarrow_forwardGlial cells far outnumber neurons and contribute roughly half the weight of the mammalian nervous system. What functions do glial cells perform in the peripheral nervous system and in the central ner-vous system?arrow_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
- Match the following components of the nervous system with their correct descriptions Interneurons Sensory neurons Motor neurons Nerve net Neurons that send signals to effector cells like muscles and glands that affect change Neurons that carry signals from the environment to the central nervous system from the peripheral nervous system Neurons that transmit signals between other neurons, part of the CNS A diffuse arrangement of neurons that are found in jellyfish and other cnidariansarrow_forwardWhich part of the nervous system directly controls the digestive system? a. parasympathetic nervous system b. central nervous system c. spinal cord d. sensory-somatic nervous systemarrow_forwardThe human nervous system is capable of a wide range of functions. What is the basic unit of the nervous system? A. Glial cell B. Meninges C. Neuron D. Cerebrospinal fluidarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College