Emergency Medical Technician (EMT) Intermediate Practice Exam

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Prepare for the Emergency Medical Technician (EMT) Intermediate Test with focused study methods including flashcards and multiple-choice questions. Practice with hints and detailed explanations to boost your readiness for the exam.

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Where are insulin and glucagon produced in the body?

Liver
Islets of Langerhans
Adrenal glands
Thyroid gland

The correct answer is: Islets of Langerhans

Insulin and glucagon are produced in the Islets of Langerhans, which are clusters of specialized cells located within the pancreas. The pancreas plays a crucial role in regulating blood glucose levels through the secretion of these two hormones. Insulin is produced by the beta cells found in the Islets of Langerhans, and its primary function is to lower blood sugar levels by facilitating the uptake of glucose into the cells. Glucagon, produced by the alpha cells in the same islets, has the opposite effect; it increases blood sugar levels by promoting the conversion of stored glycogen in the liver back into glucose when blood sugar levels are low. The other options do not produce insulin or glucagon. The liver plays a role in glucose metabolism but does not secrete these hormones. The adrenal glands are involved in producing hormones like adrenaline and cortisol, and the thyroid gland is responsible for producing hormones that regulate metabolism, but neither of these glands has functions associated with insulin or glucagon production.