Question 11 of 25intermediate💡 UnderstandShort Answer3 marks

How does chemical coordination take place in animals?

Correct Answer

Chemical coordination in animals takes place through hormones. Hormones are produced in one part of an organism and move to another part to achieve the desired effect. Unlike electrical impulses transmitted via nerve cells, which have a limited range of tissues they can instruct, chemical signals reach all cells of the body and provide the wide-ranging changes needed for coordination.

For example, when animals face a scary situation, the hormone adrenaline is secreted from the adrenal glands. This chemical signal reaches all cells and helps prepare the body for activities like fighting or running away. A feedback mechanism regulates the action of the hormones to maintain proper control and coordination in the body.

Exercise: QUESTIONS | Q: 1 | (Page Page 12)
For More Understanding

Explanation

The answer draws directly from the textbook context which explains that chemical coordination uses hormones as chemical signals that can reach all cells of the body (unlike limited electrical impulses). The adrenaline example is explicitly mentioned in the context as a hormone secreted from adrenal glands. The feedback mechanism is stated in the 'What you have learnt' section.

Solution Steps

  1. Step 1: Define chemical coordination using hormones from the context

  2. Step 2: Explain how chemical signals differ from electrical impulses (reach all cells vs limited range)

  3. Step 3: Provide the adrenaline example from the context

  4. Step 4: Mention the feedback mechanism that regulates hormone action

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