WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 20, Problem 8SA
Summary Introduction
To analyze:
Why multicellularity and large body size typically lead to the increased importance of the internal environment in influencing cell functioning.
Introduction:
Multicellular organisms maintain a controlled internal environment, to allow their cells to function properly.
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Which component of the plasma membrane is primarily responsible for forming a physical barrier between the cell’s internal and external environments?
Why is the cell membrane not an absolute barrier between the cytoplasm and the external environment?
Describe the cell membrane and discuss its functions.
Chapter 20 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
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- Cell membrane modifications found on epithelial cells in the small intestine and kidney tubules that prevent movement of material from the intestinal tract into the peritoneal cavity are called ______arrow_forwardGive the biological terms for (a) cellular reproduction and (b) cell death.arrow_forwardDescribe the components of the cell membrane and their role in maintaining homeostasis.arrow_forward
- You are working in a lab and need to help a doctor discover the cause of a disorder related to cellular organelles. Study the list of symptoms given and provide a cellular explanation for the following symptoms experienced by patients. A 42 year old male that has had no major health issue to date complains of weight gain and tiredness. Laboratory results are negative for hepatitis and shows excessive glycogen granules in the liver. In addition there are high levels of fat in the liver (abnormal metabolism) and the male has low testosterone levels. Additional laboratory results show an abnormal calcium balance in the cells. Which organelle(s) may be responsible for these symptoms? Explain your reasoningarrow_forwardCell specializations are usually a modification or elaboration of one of the basic cell functions. (True or fa1se?)arrow_forwardThe plasma membrane __________. a. surrounds the cytoplasm b. separates the nucleus from the cytoplasm c. separates the cell interior from the environment d. both a and carrow_forward
- Define somatic cells.arrow_forwardDiscuss, in general terms, how a cell receives and processes information that lets it know what it should do to respond to external conditions.arrow_forwardThe major function of the plasma membrane is to: define the structure of the organelles. provide genetic information for the cell. synthesize chemicals for metabolism. regulate the passage of molecules and ions.arrow_forward
- All of the following general functions are carried out by all cells except (a). obtaining nutrients and chemical building blocks. (b.) maintaining integrity of the plasma membrane. (c.) replacing cells through cell division. (d.) disposing of wastes.arrow_forwardState the cell theory.arrow_forwardWhat are four things that cells can do to maintain homeostasis?arrow_forward
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