Chapter 4 - Chapter 4 Cellular Metabolism Page 116 1 What...

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Chapter 2 Chemical Basis of Life Page 51 Questions 1. Why is a knowledge of chemistry essential to understanding physiology? a. Because body functions depend on cellular functions that, in turn, result from chemical changes. 2. What is biochemistry? a. Chemistry of living organisms; helps explain physiological processes but also helps in developing new drugs and methods for treating diseases. Page 53 Questions 1. What is the relationship between matter and elements? a. Matter is anything that has weight and takes up space. All matter is composed of fundamental substances called elements . 2. Which elements are most common in the human body? a. Carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorous – Make up more than 95% of the human body (BULK Elements) b. Elements required in small amounts are called trace elements. c. Ultratrace elements are toxic in large amounts but vital in small amounts – arsenic. 3. Where are electrons, protons, and neutrons located within an atom? a. The nucleus houses protons and neutron and electrons move around the nucleus. Protons and neutrons are about equal weight. 4. What is an isotope? a. Atoms that have the same atomic number but a different atomic weight because of a different amount of neutrons. 5. What is atomic radiation? a. Comes from unstable isotopes – the energy they emit is called atomic radiation. i. Alpha – particles from atomic nuclei, each of which includes two protons and two neutrons that move slowly and cannot easily penetrate matter. ii.
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This note was uploaded on 02/12/2009 for the course SCI 1234 taught by Professor Mrs.thomas during the Spring '09 term at Hinds CC.

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Chapter 4 - Chapter 4 Cellular Metabolism Page 116 1 What...

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