Taking the example of any two animal hormones along with their gland of secretion, explain how these hormones help (i) in growth and development and (ii) regulate metabolism, in the body.
Taking the example of any two animal hormones along with their gland of secretion, explain how these hormones help (i) in growth and development and (ii) regulate metabolism, in the body.
Two animal hormones, their glands of secretion, and their roles are explained below:
- Growth Hormone (secreted by the Pituitary Gland):
- Role in Growth and Development: It regulates the growth and development of the body. Balanced secretion of this hormone is essential; its deficiency in childhood leads to dwarfism, while excess secretion causes gigantism.
- Thyroxin (secreted by the Thyroid Gland):
- Role in Metabolism: Thyroxin regulates carbohydrate, protein, and fat metabolism in the body. This ensures the best balance for balanced growth. Iodine is essential for the synthesis of thyroxin by the thyroid gland.
Marking Scheme
- 11.5 marks for explaining Growth Hormone (0.5 mark for Pituitary gland, 1 mark for explaining its role in growth and development).
- 21.5 marks for explaining Thyroxin (0.5 mark for Thyroid gland, 1 mark for explaining its role in regulating carbohydrate, protein, and fat metabolism).
Hint
Think of the master gland at the base of the brain for growth, and the gland in the neck that requires iodine for regulating metabolism.
Quick Oral Answer
Growth hormone is secreted by the pituitary gland and regulates overall body growth. Thyroxin is secreted by the thyroid gland and regulates carbohydrate, protein, and fat metabolism.
Analysis & Explanation
Animal hormones are chemical messengers secreted directly into the blood by endocrine glands to coordinate complex processes like growth, development, and metabolism across the body.
- Growth Hormone is secreted by the pituitary gland, which is located at the base of the brain. It stimulates growth in all organs, particularly bones and muscles.
- Thyroxin is secreted by the thyroid gland located in the neck region. It requires iodine for its synthesis. It controls the metabolic rate of carbohydrates, proteins, and fats, ensuring proper energy release and cellular maintenance.
Common Mistakes
- 1Writing the wrong gland for the hormone (e.g., stating that the thyroid gland secretes growth hormone).
- 2Not specifying that thyroxin regulates carbohydrate, protein, and fat metabolism specifically.
Interesting Facts
Iodized salt is recommended in our diet because iodine is essential for the thyroid gland to make thyroxin, preventing goitre (swollen neck).
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2024?
This question carries 3 marks in the CBSE Class 10 Science 2024 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Control and Coordination" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Hormones in Animals" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2024 paper?
This is a Short Answer question from Section C in the CBSE Class 10 Science 2024 paper.