This section is Section 2 of 3.

Speed as well as accuracy is important in this section. Work quickly, or you might not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. Each question is worth one mark.

You must complete the answers within the time limit. Calculators are NOT permitted.

Good Luck!

Which of the following could result in a homeostatic response?

1. A rise in an internal condition.

2. A reduction in an internal condition.

3. A rise in an external condition.

4. A reduction in an external condition.

1.
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    Explanation

    The correct answer is F.

    All 4 Statements are correct. To maintain a constant internal environment, a rise and reduction in internal and external conditions can be counteracted by hormones, to restore the original balanced state. Although it may seem that external conditions should not be included in the answer, external conditions are not specified here – they can apply to external stimuli, which can be cause nervous responses, action of chemicals on the body (restricted to the skin), which can be counteracted by hormones etc.

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