CBSE class 10 Biology Chapter : control and coordination --- Trend Setter solved Problems Class 10 Trendsetter solved CBSE Test paper-01 1. How does the nervous tissue cause action? Ans:. When a nerve impulse reaches the muscle,the muscle fibre must move by changing their shape.this is possible as muscle cells have special proteins that change both their shape and arrangement in the cell in response to nervous electrical impulses.when ths happens new arrangements of these proteins give the muscle different shapes. 2.Which organ secretes hormone when the blood sugar rises?name a digestive enzyme released by this organ. Ans: Pancreas secretes hormone insulin when sugar level rises.Digestive enzyme secreted by pancreas is trypsin(that digests protein). 3.What will happen when plant is exposed to unidirectional light? Ans: .Phototropism i.e. bending of stem towards unidirectional flow of light. 4. A particular hormone requires iodine for its synthesis.N
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