Population dynamics

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1. To function efficiently, many aspects of the human body's internal environment must be maintained within tolerable limits.

2. Physiological homeostasis is the name given to the maintenance of the internal environment despite changes in the external environment.

3. Homeostasis operates on the principle of negative feedback control. By this means a change in the internal environment is detected by receptors which send messages to effectors. These trigger responses which negate the deviation from the norm and return the internal environment to its set point.

4. Population dynamics is the study of population changes and the factors which cause them.

5. A population increases until it reaches the carrying capacity of the environment and then it remains relatively stable.

6. A population is prevented…


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