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Reaching the Age of Adolescence — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceReaching the Age of Adolescence4 Marks
Question
Name the hormone which would be released during the following situations:
$a.$ A frightened person.
$b.$ Growth of a child to adult.
$d.$ Development of caterpillar to moth.
$d.$ Development of tadpole to frog.
✓

Answer

$a.$ Adrenaline is secreted from adrenal gland during the stress conditions like fright or fear, anger, worry or embarrassment. The hormone prepares the body to function at maximum efficiency by increasing the heart beat and breathing rate, raising $\text{B.R}$, etc.
$b.$ Growth hormone is secreted from pituitary gland to regulate the normal growth of a person, i.e. growth of a child to adult. Its deficiency in childhood makes a person dwarf, while its excess makes a person very tall $($gigantism$).$
$c.$ Insect hormones control the development of caterpillar to moth, i.e. Metamorphosis.
$d.$ Thyroxine is produced by thyroid gland to control the development of tadpole to frog. Iodine in water is necessary for its production.

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