Insulin is a protein hormone whose function is to
Correct answer: B. lower blood glucose concentration by promoting uptake and storage
- A. raise blood glucose concentration
- B. lower blood glucose concentration by promoting uptake and storage
- C. digest proteins in the stomach
- D. carry oxygen
Explanation
Secreted by the beta cells of the pancreas, insulin increases the permeability of cells to glucose and stimulates its conversion into glycogen, so blood glucose falls. Glucagon raises it, and the two form a negative feedback pair. Insulin was the first protein to have its full amino acid sequence determined.
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About Importance of Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their biological roles depend on primary, secondary, tertiary and quaternary structure. Coverage includes enzymes, hormones, antibodies, transport proteins, muscle fibres and structural tissues, together with denaturation and the effects of heat, pH and chemicals.
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