Question

CONTROL AND CO ORDINATION

WORKSHEET: 1

1. Mention the three main major regions of the brain and mention the function of each one of them.

2. List four plants hormones and write one function of each.

3. What is phototropism? How does it occur in plants? Describe an activity to demonstrate phototropism.

4. Name a hormone secreted by a) pancreas b) pituitary c) thyroid. State one function of each of the hormone.

5. What Is a Reflex Arc? Draw a flowchart showing of events which occur during sneezing.

6. Which gland secretes digestive enzyme as well as hormones?

7. Why is the flow of signals in a synapse from axonal end of one neuron but not the reverse?

8. Give a reason to explain why :

(i) adrenaline helps in dealing emergency situations?

(ii) Secretions of growth hormone should be specific in the human body?

(iii) Some patients of diabetes are treated by giving injections of insulin?

9. How does control and coordination takes place in plants?

10. List the functions of testosterone and estrogenic.

11. What are meanings? What are their functions? Name the fluid, which is filled in between meanings.

12. What is the role of the brain in reflex action?

13. How do auxins promote the growth of a tendril around a support?

14. Why is the use of iodised salt advisable?

15. How does our body respond when adrenaline is secreted into the blood?

16. Why are some patients of diabetes treated by giving injections of insulin?

17. What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

18. Which signals will get disrupted in case of a spinal cord injury?

19. How does pancreas control glucose level of blood?



20. Glucagon is secreted when glucose level of blood falls. It mobilises reserve food like glycogen into glucose. What is pregnancy hormone? Why is it known so?

21. Which system is working when you start sweating during exercise? What is its function?

22. What is synapse? In a neuron cell how is an electrical impulse created and what is the role of synapse in this context?



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Answer 1

Answer:

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Answer 2

Answer:

No 2

Explanation:

Four plant hormones are:

Auxin, gibberellins, cytokinins and abscisic acid.