3rd Edition

ISBN: 9780073525549

Author: Mariëlle Hoefnagels Dr.

Publisher: McGraw-Hill Education

Concept explainers

Corona Radiata is a collection of nerve fibers present in the brain that carries messages between the brain cells of the cerebral cortex and the brain stem. Both brain stem and cerebral cortex play a role in motor function and sensation and it is the cor…

Neuron Structure

A neuron is defined as the functional unit of the body system called the nervous system. It is significant in transmitting signals that include receiving and sending the signals from a portion of the brain. The neurons are considered specialized cells in…

Afferent Neurons

Neurons are electrically excitable cells in the body specialized for receiving and transmitting information. They are referred to as the structural units of the nervous system. The important parts of a neuron include the cell body, dendrites, and axons.

Motor Homunculus

The term homunculus is Latin and is referred to as ‘little man’. In neuroanatomy, the cortical homunculus is either the motor or sensory distribution along the cerebral cortex of the brain. It was discovered by the great scientist ‘Wilder Penfield and Ed…

Nervous System

The nervous system is the portion of an animal's body that controls and transmits signals between various parts of the body. The central nervous system (CNS) and the peripheral nervous system (PNS) are the two primary components of the nervous system in …

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Textbook Question

Chapter 21, Problem 27WIO

Invasive animal species are disrupting ecosystems around the world. Search the Internet for a list of invasive animal species. Which phyla are represented in the list? What harm do invasive species do? How important is it to try to eradicate invasive species?

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Chapter 21, Problem 26WIO

Chapter 21, Problem 1PIT

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Chapter 21 Solutions

Biology: Concepts and Investigations

Ch. 21.1 - Prob. 1MC Ch. 21.1 - Prob. 2MC Ch. 21.1 - Prob. 3MC Ch. 21.1 - Prob. 4MC Ch. 21.1 - Prob. 5MC Ch. 21.1 - Prob. 6MC Ch. 21.1 - Prob. 7MC Ch. 21.1 - Prob. 8MC Ch. 21.1 - What advantages does segmentation confer?Ch. 21.1 - Prob. 10MC

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Invasive animal species are disrupting ecosystems around the world. Search the Internet for a list of invasive animal species. Which phyla are represented in the list? What harm do invasive species do? How important is it to try to eradicate invasive species?

Solution Summary: The author enumerates the invasive animal species and their phylum and states the importance of removing them from the ecosystem.

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Chapter 21 Solutions