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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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Chapter
Section
BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Lycopene, which is abundant in tomatoes, is thought to have a potential benefit in protecting against many types of cancers. In the study, the results of which are shown in the Figure, mice were exposed to tobacco smoke or normal air. The amount of lung tissue damage caused by each exposure was measured in mice that were given tomato juice (1) or water (2). To estimate the destruction of the alveolar wall, a destructive index (DI) was calculated from histological slides of the lung. All lungs will show some level of damage, but a DI above 10% is considered significant destruction.

Chapter 46, Problem 1ITD, Lycopene, which is abundant in tomatoes, is thought to have a potential benefit in protecting

What is the effect of tobacco smoke on the lung tissue in these mice?

Source: Based on S. Kasagi et al. 2006. Tomato juice prevents senescence-accelerated mouse P1 strain from developing emphysema induced by chronic exposure to tobacco smoke. American Journal of Physiology–Lung Cellular and Molecular Physiology 290:L396–L404.

Summary Introduction

To review:

The effect of tobacco smoke on the lung tissue in mice on the basis of results shown in the figure below:

Biology: The Dynamic Science (MindTap Course List), Chapter 46, Problem 1ITD

Introduction:

Lungs are spongy, air-filled organs located below the ribcage and above the diaphragm. These are important organs of the respiratory system, which consist of the trachea (windpipe), bronchi, bronchioles, and alveoli.

Explanation

Tobacco smoke contains toxins that are harmful to the lung tissues. When tobacco smoke is inhaled, it moves through the mouth to upper airway and finally reaches the alveoli. Toxins from the tobacco smoke are adsorbed and deposited in the airways and alveoli. These toxins are carcinogenic and substantial exposure to these toxins place smokers at risk of various respiratory diseases including lung malignancies...

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