Science
Control and Coordination
Practice questions
A person staggers while walking but thinking and memory are normal. Which part is more likely affected?In which situation can disturbance of the medulla be most dangerous?Contraction of the pupil in bright light demonstrates which deeper principle of coordination?Which statement most accurately shows a limitation of nervous control compared with hormonal control?In which event is the combined effect of nervous and hormonal control most clearly demonstrated?If adrenaline secretion increases, which change helps provide more energy to muscles?If blood sugar is very high and insulin is low, the cause is most directly related to which gland?What is the most accurate relationship between thyroxine deficiency and goitre?If growth hormone is secreted in a very low amount during childhood, which problem becomes more likely?When the level of a hormone in the blood rises and its secretion decreases, which principle is illustrated?Hormones circulate in the blood throughout the body. Why do they act only on certain organs?If a root grows towards water and away from light at the same time, which conclusion is correct?On what basis is pollen-tube growth towards an ovule different from ordinary phototropism?What is the deeper reason behind a tendril coiling around a support?How are folding of Mimosa leaves on touch and coiling of a tendril around a support different?Which option correctly analyses growth-based and non-growth-based plant responses?Why is cytokinin especially useful in actively growing regions?Which option gives the correct scientific basis of control in plants?Which statement correctly explains directional growth of root and stem together?Which option gives the most accurate application of stimulus and response?