Chemical Coordination and Integration — Important Questions
ICSE · Class 11 · Biology
60 important questions from Chemical Coordination and Integration for ICSE Class 11 Biology, with answers. Part of the ICSE Class 11 Biology syllabus.
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Important Questions from Chemical Coordination and Integration
Which hormone promotes water reabsorption from the distal convoluted tubule of the nephron?
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ADH (vasopressin)
ADH (antidiuretic hormone/vasopressin) promotes reabsorption of water from the distal convoluted tubule, concentrating urine.
Diabetes insipidus is caused by deficiency of which hormone?
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ADH
Diabetes insipidus results from ADH deficiency, leading to large volumes of dilute tasteless urine and intense thirst.
Which hormone stimulates uterine contractions during childbirth?
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Oxytocin
Oxytocin, stored in the posterior pituitary, causes uterine muscle contractions during parturition and also triggers milk ejection.
Calcitonin is secreted by which cells of the thyroid gland?
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Parafollicular (C) cells
Calcitonin is secreted by parafollicular (C) cells of the thyroid gland and lowers blood calcium levels.
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