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Clear, engaging, and visual, Starr and McMillan's HUMAN BIOLOGY teaches you the core concepts of human biology and prepares you to make well-informed decisions in your life. Each chapter opens with an application that highlights the relevance of biology and motivates the study of the topic. You then learn the basic concepts which help you think critically about these issues. Useful pedagogy such as section ending "Take-Home Messages" and a running glossary help you understand key concepts. At the end of the chapter, "Your Future" and "Explore on Your Own" sections demonstrate the impact and personal relevance of the content. Available with InfoTrac Student Collections http://gocengage.com/infotrac.
coronary artery stent (metal mesh) placed to keep artery open B From Frances Sienkiewicz Sizer; Eleanor Noss Whitney, Nutrition: Concepts and Controversies, © 2002 Cengage Learning A plaque ﬂattened by balloon angioplasty Figure 7.20 Bypass surgery and balloon angioplasty are common treaments for clogged coronary arteries. when blood-starved heart muscle no longer receives enough oxygen. Typical warning signs in men include pain or a sensation of squeezing behind the breastbone, pain or
dilate, so more blood flows through them. As a result, the tissue reddens and warms with blood-borne metabolic heat. Histamine also makes capillaries leak. The narrow gaps between the cells of the capillary wall become a bit wider, so plasma Macrophage engulfing an invading cell proteins and phagocytes slip out through them. Water flows out as well. Due to these and other changes, the tissue balloons with fluid. This swelling is called edema. The pain that comes with inflammation is due to edema
covalent bond, atoms share electrons 20 A hydrogen bond links polar molecules 21 2.5 Water: Necessary for Life 22 Hydrogen bonds make water liquid 22 Water can absorb and hold heat 22 Water is a solvent 23 2.6 Focus on Health: Antioxidants Help Protect Cells 23 2.7 Acids, Bases, and Buffers: Body Fluids in Flux 24 The pH scale indicates the concentration of hydrogen ions in fluids 24 Acids give up H1 and bases accept H1 24 A salt releases other kinds of ions 25 Buffers
energyrequiring ones. In the ATP/ADP cycle, the transfer of a phosphate group turns ATP into ADP, then back again to ATP. (© Cengage Learning) 58 Chapter 3 Copyright 2016 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience.
Fermariello/Science Source) C dead, flattened cells of a shaft of hair 78 Chapter 4 Copyright 2016 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time