18th Edition

ISBN: 9781323717271

Author: Urry, Cain, Wasserman, Minorsky, Reece

Publisher: PEARSON C

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 50.6, Problem 2CC

MAKE CONNECTIONS. Ø Peristalsis contributes to the locomotion of many annelids and to the movement of food in the digestive tract (see Concept 41.3). Using the muscles of your hand and a toothpaste tube as a model of peristalsis, how would your demonstration differ for the two processes?

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Chapter 50.6, Problem 1CC

Chapter 50.6, Problem 3CC

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Chapter 50 Solutions

Campbell Biology: Custom Edition

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MAKE CONNECTIONS. Ø Peristalsis contributes to the locomotion of many annelids and to the movement of food in the digestive tract (see Concept 41.3). Using the muscles of your hand and a toothpaste tube as a model of peristalsis, how would your demonstration differ for the two processes?

Solution Summary: The author compares the demonstration of peristalsis between annelids locomotion and the movement of food in the digestive tract with the help of a toothpaste tube and hand muscles.

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Chapter 50 Solutions