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Why are hormones called ‘chemical messengers’?
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What are the general properties of hormones?
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Give some adaptations in green leaf photosynthesis.
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Which parts of the alimentary canal produce hormones?
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Name the different endocrine glands found in the body of man.
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What is the importance of photosynthesis in the life of the following:
Green plants
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What is the importance of photosynthesis in the life of the following:
Non-green plants
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Is the following gland an exocrine or an endocrine gland?
Salivary gland
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Is the following gland an exocrine or an endocrine gland?
Liver
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Complete the following:
| Gland/Organ | Hormone | Function |
| (i) Stomach | __________ | __________ |
| (ii) Parathyroid | __________ | __________ |
| (iii) __________ | __________ | Lowers blood sugar level. |
| (iv) Adrenal medulla | __________ | __________ |
| (v) Pancreas (Alpha cells) | __________ | __________ |
| (vi) Testes | __________ | __________ |
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What is the importance of photosynthesis in the life of the following:
Animals
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Given below is a table consisting of a set of items belonging to a common category. Complete the table by filling in the category and the odd one in the blanks
| Set | Category | Odd one |
| Adrenaline, Penicillin, Insulin, Thyroxin | __________ | __________ |
| Vasopressin, growth hormone, TSH, ACTH, FSH | __________ | __________ |
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Complete the table given below by filling in the blanks numbered 1 to 8.
| Gland | Hormone Secreted | Effect on Body |
| 1 | 2 | Regulates basal metabolism |
| Pancreas (β-cells) | 3 | 4 |
| 5 | 6 | Increases heart beat |
| 7 | Thyroid stimulating hormone | 8 |
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Hormones are called ‘chemical messengers’.
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Organs like the stomach and intestine are also endocrine glands. Why?
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The release of progesterone in the urine is an indication of pregnancy. Explain.
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How do non-green plants such as fungi and bacteria obtain their nourishment?
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Differentiate: Hormones and Enzyme.
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Differentiate: Insulin and Glucagon.
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Differentiate: Nervous control and Hormonal control.
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