Question

(a) Name the gland that secrete : (i) insulin, (ii) thyroxin (b) Explain with an example how the timing and amount of hormone secreted are regulated in a human body.

Answer 1

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a)i.Insulin is secreted by the gland pancreas.

a)ii.Thyroxin is secreted by the thyroid gland.

b)The timing and amount of hormone released are regulated by a feedback mechanism.

Example: If the sugar level in bloodrise, they are detected by the cells (Islets of Langerhans) of pancreaswhich respond by producing more insulin.

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Answer 2

I)insulin- pancreas,ii) thyroxin-thyroid gland