A doctor advised a person to take an injection of insulin because
(a) his blood pressure was low
(b) his heart was beating slowly
(c) he was suffering from goitre
(d) his sugar level in blood was high
Answer: D
Solution: The specialised cells called as beta cells in Islets of Langerhans in the pancreas produce insulin. It plays a key role in absorption of blood sugar by the cells. Thus, the patient who is advised to take insulin injections might be suffering from high blood sugar level in the body.