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3.2 Coordination and control – the endocrine system

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Question 3

A research team records two responses after the same stimulus. The time taken for each response to begin and the time it continues after the stimulus are shown below.

ResponseTime before response beginsTime response continues after stimulus
X12 s4 min
Y0.02 s0.2 s

Which response, X or Y, is controlled by hormones?

Use the data in the table to explain your answer.

[3]
Markscheme

3.2 Coordination and control – the endocrine system Questions

  1. GCSE
  2. /Biology
  3. /3.2 Coordination and control – the endocrine system

84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.

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