The Effect Of Exercise On The Maintenance Of Homeostasis

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St Joseph's College Gregory Terrace

Year 12 Biology
Assessment Item 6:
Extended Experimental Investigation
Part A
Term 1 2014

The Effect of Exercise on the Maintenance of Homeostasis
Name: Jonah McLennan
Class: C
Teacher: Mrs Hart
Group Members: James Wilkinson, Samuel Stark, Christopher Daly, Thomas Yip, Andrew McWhinney, Joshua Zuill. Due Date: Monday 10th March 2014 (Week 7)

Abstract
The levels of an internal environment have been vastly researched to gain a better understanding of homeostasis and its mechanisms. However the immediate objective of this study is to not only investigate homeostasis and the relevance of its essential components, but to also relate findings to the relevance of level of fitness. This shall be investigated by exposing two test subjects to a period of exercise, then recording the measurements of the relevant variables. The results will link the findings obtained, to evidence derived from; systems, processes and biological terminology. The results of the experiment identified that level of fitness has no determination on the ability to return to homeostasis, disproving the hypothesis. However it was determined that level of fitness does have an effect on the ability to handle stress within an internal environment which is created by exercise. This study will add onto other research conducted, to create a better understanding on the effect of exercise and the maintenance of homeostasis.

Contents

Title Page……………………………………………………………………….. Page 1 Abstract…………………………………………………………………………. Page 2 Contents………………………………………………………………………… Page 3

Introduction
Rationale………………………………………………………………… ……….. Page 4 Background Information……………………………………………………. Page 4 – 6 Aim…………………………………………………………………………………….. Page 6 Hypothesis…………………………………………………………………………. Page 6

Methods
Materials……………………………………………………………………………. Page 6 Procedure…………………………………………………………………………… Page 7 Fair Experiment…………………………………………………………………… Page 7 – 8 Risk……………………………………………………………………………………… Page 8

Results
Presentation of Results……………………………………………………….Page 9 – 11 Interpretation of Results……………………………………………………. Page 11 – 13

Discussion
Explanation of data…………………………………………………………... Page 13 – 18 Evaluation of Experiment………………………………………………….. Page 18

Conclusion………………………………………………………………………..Page 19

References…………………………………………………………………………Page 20

1. Introduction
1.1 Rationale
Homeostasis is a key element in enabling the body to tolerate exercise. Homeostasis allows the internal environment of an organism to respond to increased stress levels associated with exercise; therefore allowing organisms to maintain increased levels of activity. 1.2 Background Information

Claude Bernard, a famous French Physiologist, pointed out in 1959 that ‘while an animal lives in an external environment, the cells of the body lie within an internal environment, and that the relative stability of the internal environment allows animals to live in an external environment that can vary considerably.’ (Gross, 1998). Homeostasis (homeo, steady; stasis, standing) is the term for the condition in which an organism’s internal environment is maintained in an optimal state (Bernstein & Bernstein, 1996). An animal cell has two fundamental tasks; to sustain life as an individual unit, and to contribute in some specialised way to the survival of other cells (Bernstein & Bernstein, 1996). Thus, if the cells are functioning at their optimal level, then the organism will function at its optimum. For cells to function at an optimal level the cells basic requirements need to be met and cellular metabolism needs to be maintained. Metabolism refers to all the chemical and energy changes that take place within the body. The maintenance of...
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