| 1. | How many pairs of cranial nerves are present in man ? | |
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41
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31
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12
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21
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Report Question| 2. | The main function of abscisic acid in plants is ? | |
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to increase the length of cells.
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to promote growth of stem.
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to promote cell division.
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to inhibit growth.
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| 3. | Ageing in human beings is caused by disappearance of which of the following glands ? | |
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Thyroid
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Thymus
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Pituitary
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Adrenal
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| 4. | you have to choose the statement which is/ are incorrect ? | |
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Our nervous system also passes information from one internal system to another.
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The nervous system is made up of the smallest special cell called neurons.
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The function of nervous system is to co-ordinate the activities of our body.
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The control and coordination in higher animals called vertebrates take place through nervous system as well as hormonal system called endocrine system.
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| 5. | Which is the correct sequence of the components of a reflex arc ? | |
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Receptors -> Sensory neuron -> Spinal cord -> Motor neuron -> Muscle
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Receptors -> Spinal cord -> Sensory neuron -> Motor neuron -> Muscle
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Receptors -> Motor neuron -> Spinal cord -> Sensory neuron -> Muscle
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Receptors -> Muscles -> Sensory neuron -> Motor neuron -> Spinal cord
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| 6. | The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age ? | |
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Testosterone from thyroid gland and estrogen from pituitary gland.
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Testosterone from testes and estrogen from ovary.
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Estrogen from adrenal gland and testosterone from pituitary gland.
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Oestrogen from testes and testosterone from ovar.
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| 7. | Response of plant roots towards water is called ? | |
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Geotropism
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Hydrotropism
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Phototropism
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Chemotropism
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| 8. | Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells ? | |
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Sensory nerves
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Cranial nerves
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Relay nerves
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Motor nerves
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| 9. | A diabetic patient suffers from deficiency of which hormone ? | |
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Oestrogen
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Insulin
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Testosterone
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Thyroxine
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| 10. | The hormone that is used to keep flowers fresh is ? | |
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abscisic acid
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auxin
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cytokinin
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gibberellins
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