BI13_Ch3 Review - BI 13 (Anatomy and Physiology 1) Review...

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BI 13 (Anatomy and Physiology 1) Review Chapter 3 – Cells: The Living Units INSTRUCTOR’S STUDY QUESTIONS 1. Approximately how many cells are in the human body? 50-100 trillion cells. 2. Identify the cell structures on the text diagram. 3. What is the main component of cytosol? Cytosol is a viscous fluid composed of water (main component), proteins, salts, sugars, and other solutes. 4. What does the term “organelle” mean? Small cellular structures that perform specific metabolic functions for the cell as a whole. 5. What is the largest intracellular structure? The nucleus. 6. What is chromatin? Structures in the nucleus that carry the genes. 7. What is made at the nucleolus? Where is the nucleolus? These are the sites where ribosome subunits are assembled. It also contains DNA for synthesizing rRNA. It is located in the nucleus. 8. What is an example of an anucleate cell in the human body? The only anucleate cell in the human body is the red blood cell. 9. What are some examples of multinucleated cells? Examples of multinucleated cells include skeletal muscle and liver cells. 10. What is the function of ribosomes? Ribosomes are responsible for protein synthesis. 11. What is the structural difference between smooth and rough ER? Rough ER contains ribosomes and smooth ER does not. 12. What is the function of rough ER? The ribosomes manufacture all proteins excreted from the cell; integral proteins and
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This note was uploaded on 08/12/2009 for the course BI 13 taught by Professor Alexasawa,ph.d during the Spring '09 term at College of the Desert.

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BI13_Ch3 Review - BI 13 (Anatomy and Physiology 1) Review...

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