IGCSE Biology Paper-2: Specimen Questions with Answers 203 - 203 of 203

Question 203

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Question

MCQ▾

After a meal, the concentration of blood glucose increase.

What then causes the concentration of blood glucose to return to normal?

Choices

Choice (4)
a.HCl
b.Adrenaline
c.Insulin
d.Amylases

Answer

c.

Explanation

  • Insulin is a hormone, which plays a number of roles in the body’s metabolism.
  • Insulin regulates how the body uses and stores glucose and fat. Many of the body’s cells rely on insulin to take glucose from the blood for energy.
  • Insulin helps control blood glucose levels by signaling the liver and muscle and fat cells to take in glucose from the blood. Insulin therefore helps cells to take in glucose to be used for energy.
  • If the body has sufficient energy, insulin signals the liver to take up glucose and store it as glycogen.
  • The liver can store up to around 5 % of its mass as glycogen.
  • Some cells in the body can take glucose from the blood without insulin, but most cells do require insulin to be present.
  • In type 1 diabetes, the body produces insufficient insulin to regulate blood glucose levels.
Insulin is a hormone

Insulin is a Hormone

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