Which gland or organ does not function properly in Type 1 Diabetes Mellitus?

MP CHO -2019 (Shift-1)

Medical Surgical Nursing

Easy

Appeared in: MP CHO -2019 (Shift-1)

Explanation

In Type 1 Diabetes Mellitus, the body's own immune system mistakenly attacks and destroys the insulin-producing beta (β) cells, which are located in the islets of Langerhans within the pancreas.
This autoimmune destruction results in an absolute or complete deficiency of insulin, the primary hormone responsible for lowering blood glucose.
Without insulin, glucose cannot move from the bloodstream into the cells to be used for energy, causing blood glucose levels to rise significantly (hyperglycemia).

Option A: The pituitary gland is the 'master gland' that regulates many other endocrine glands, but it does not produce insulin or cause the autoimmune destruction seen in Type 1 DM.
Option C: The adrenal glands produce hormones like cortisol and adrenaline, which can raise blood sugar levels as part of the stress response, but they are not the primary site of malfunction in Type 1 DM.
Option D: The kidneys are victims of long-term, poorly controlled diabetes, not the cause. High blood sugar levels over many years can lead to diabetic nephropathy (kidney disease).

Clinical Relevance

Nursing practice connection: Knowing Pathophysiology of Type 1 Diabetes Mellitus helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding that the pancreas is the site of failure in Type 1 DM is crucial for patient education. Nurses must explain that the body no longer produces insulin, making lifelong insulin therapy non-negotiable.
This knowledge underpins all nursing care for Type 1 DM, including blood glucose monitoring, insulin administration (via injection or pump), and teaching the signs of hypoglycemia and hyperglycemia.
What if? If the patient had Type 2 Diabetes, the primary issue would not be a lack of insulin production (at least initially), but rather insulin resistance, where the body's cells don't respond effectively to insulin. The pancreas is still involved, but the mechanism is different, and initial treatment often involves oral medications, diet, and exercise.

How to Approach the Question

First, identify the key term in the question: 'Type 1 Diabetes Mellitus'.
Recall the basic pathophysiology of this specific disease. The core problem in Type 1 DM is related to insulin.
Ask yourself: Which organ is responsible for producing insulin?
Scan the options: Pituitary gland, Pancreas, Adrenal gland, Kidneys.
Select the pancreas, as it is the organ containing the beta cells that synthesize and secrete insulin.
Mentally eliminate the other options by recalling their primary functions (pituitary as master gland, adrenals for stress hormones, kidneys for filtration) to confirm your choice.

Concept Tested & Keywords

Q6c-cYmT_UMk_U_ojSGPyk

E6 Physiology Essentials Sembulingam 10e Part 2 p. 69-71

E6 textbook of Applied Biochemistry and Nutrition & DieteticsHarbans Lal (pp 26-464 of 479) p. 46-48

E6 Anatomy Applied Ashalatha 4e p. 224-226