| 1. | Which of the following statements is correct about receptors ? | |
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Olfactory receptors detect taste and gustatory receptors smell
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Auditory receptors detect smell and olfactory receptors detect taste
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Gustatory receptors detect taste while olfactory receptors detect smell
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Both gustatory and olfactory receptors detect smell
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Report Question| 2. | If there is a deficiency of growth hormone the child becomes _____ ? | |
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Giant
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Dwarf
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Mentally retarded
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Blind
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| 3. | Consider the following statements and choose the incorrect one ? | |
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A gland which does not have a duct and secrets its product directly into the bloodstream is called an endocrine gland.
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A gland which secretes its product into a duct tube is called an exocrine gland.
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Hormones are the chemical substances which coordinate the activities of living organisms and also their growth.
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None of the above.
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| 4. | Identify which of the following statements about thyroxin is incorrect ? | |
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It regulates protein, carbohydrates and fat metabolism in the body.
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Iron is essential for the synthesis of thyroxin.
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Thyroxin is also called thyroid hormone.
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Thyroid gland requires iodine to synthesize thyroxin.
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| 5. | Abscisic acid controls ? | |
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cell division
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leaf fall and dormancy
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shoot elongation
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cell elongation and cell wall formation
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| 6. | The main effect of cytokinin in plants is to ? | |
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prevent the growth of lateral buds
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stimulate cell division
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regulate opening and closing of stomata
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improve the quality of fruits
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| 7. | The leaves of Mimosa are sensitive to ? | |
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heat
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touch
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smell
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light
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| 8. | Reflex arc is formed by ? | |
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muscle -> spinal cord -> receptor
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receptor -> spinal cord -> muscle
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receptor -> brain -> muscles
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muscle -> brain -> receptor
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| 9. | Which part of a nerve cell contains a nucleus ? | |
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Nerve endings
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Cyton
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Dendrite
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Axon
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| 10. | Which part of nervous system controls the reflex activities of the body ? | |
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Cerebellum
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Cerebrum
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Brain
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Spinal cord
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