HBS 2011 marking key.pdf - HBS3 2011 marking key (student...

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HBS3 2011 marking key (student version)Section One: Multiple-choice questions1A6C11B16A2C7A12A17D3D8B13B18C4B9B14A19B5C10D15C20DText in grey (like this) are for MCQ that are out of syllabus or without a picture.~*~Section Two: Short-answer questionsQuestion 21 (8 marks)(a)Complete the table below, describing key differences between how the nervous and endocrine systems controlhomeostasis in the body. (4 marks)
Question 22 (12 marks)NOT IN SYLLABUSQuestion 23 (11 marks)NOT IN SYLLABUSQuestion 24 (15 marks)(a)Suggest a hypothesis for this experiment. (1 mark)
(b)Describetwo (2)variables that were controlled in the experiment. (2 marks)
(c)What is the purpose of a placebo? (1 mark)(d)Graph the results in the table on the grid provided below. You may use pencil. (5 marks)
(e)(i)At which time of the day was the new drug most effective? (1 mark)
(e)(ii)At which time of the day was the new drug least effective? (1 mark)
4 am

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Term
Fall
Professor
NoProfessor
Tags
white blood cell, T Cell, B cell

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