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Subjects

Science

Control and Coordination

नियंत्रण एवं समन्वय

In Class 10 Science, this topic from the chapter “World of Living” explains how organisms detect changes, process information, and respond in an organised way. Students learn about stimuli, neurons, reflex actions, the brain and spinal cord, and the role of the nervous system in coordinating body functions. The topic also introduces plant movements and chemical coordination through plant hormones, along with hormonal control in animals. It helps learners connect structure, communication, and response in living organisms.

Practice questions

What is the correct relation between thyroxine deficiency and iodine deficiency?In which situation will the role of the pituitary gland be most clearly seen?Why does a hormone not affect every cell even after spreading through the blood?Which comparison between nervous control and hormonal control is most correct?If a root receives signals from the direction of water and from gravity, what idea does this question test?What is the main difference between folding of touch-me-not leaves and coiling of a tendril?What is common between pollen tube growth towards the ovule and root growth towards water?Which situation will be called negative phototropism?A stem grows upward and a root grows downward. What will their responses to gravity be called in the same plant?If the thyroid gland does not make enough thyroxine, which general body function may be affected?In which situation is the principle of negative feedback most clearly shown?A runner is under stress just before a race. Which hormone will prepare the body most immediately?What is the main difference between long-term adolescent changes and immediate hand withdrawal?If testosterone secretion from the testes is low, which effect is more likely in an adolescent boy?What is the correct relation between estrogen secretion from the ovaries and changes during adolescence?Which statement correctly describes receptor specificity?If a receptor becomes active for the wrong stimulus, what problem may occur in the response?What is the correct conclusion about division of work in different parts of the brain?A person has difficulty detecting smell but has no problem seeing or hearing. Which conclusion is most suitable?If the target organ of a hormone is present but its receptors have changed what may happen?