MEDIUM
11th West Bengal Board
IMPORTANT
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Calcitonin and parathormone are two hormones which increase and decrease calcium level in the blood respectively.

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Important Questions on Chemical Co-ordination and Regulation

EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 20
Zona glomerulosa of the adrenal cortex mainly secretes cortisol, a glucocorticoid hormone.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 21
Aldosterone is a steroid hormone that helps the reabsorption of water and Na+ from the renal tubules of the kidney.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 22
The number of beta-cells in the pancreas (Islet of Langerhans) is maximum which secretes insulin.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 23
Lack of beta-cells in the pancreas causes hyperglycemia and glycosuria.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 24
Adrenaline is responsible for "fight or flight response".
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 25
Dwarfism is due to a lack of secretion of hGH in which the body fails to grow, and the body proportion becomes childlike.
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 26
Hyposecretion of the thyroid in an adult causes Cushing’s syndrome. 
EASY
11th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 20 - Chemical Co-ordination and Regulation>EXERCISE>Q 27
Hypersecretion of glucocorticoids and aldosterone causes Addison's diseases.