All of the following are endocrine glands except:

Appeared in: IGNOU PB Bsc Entrance-2022

Explanation

Salivary glands are classified as exocrine glands, not endocrine glands.
Exocrine glands are characterized by the presence of ducts, which they use to secrete their products (like saliva) onto an epithelial surface or into a cavity.
In contrast, endocrine glands are ductless and release their products (hormones) directly into the bloodstream to travel throughout the body.

Option B: The adrenal glands are a core part of the endocrine system. They are located on top of the kidneys and secrete essential hormones like cortisol, aldosterone, and adrenaline.
Option C: The pituitary gland is a major endocrine gland, often called the 'master gland' because it controls the functions of many other endocrine glands.
Option D: The thyroid gland is a vital endocrine gland located in the neck. It produces thyroid hormones (T3 and T4) that regulate the body's metabolism.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Difference between endocrine and exocrine glands as background academic context rather than a clinical decision trigger.
Understanding the difference between endocrine and exocrine glands is fundamental for diagnosing and managing a wide range of conditions, from hormonal imbalances (like diabetes or thyroid disorders) to digestive issues.
Nurses frequently administer hormone replacement therapies (e.g., insulin, thyroxine) for endocrine disorders and manage symptoms related to exocrine dysfunction (e.g., dry mouth from salivary gland issues).
What if the question was about the pancreas? The pancreas is a unique organ because it has both endocrine functions (islets of Langerhans secreting insulin and glucagon into the blood) and exocrine functions (acinar cells secreting digestive enzymes into the duodenum via ducts).

How to Approach the Question

First, identify the core concept in the question stem, which is 'endocrine glands'.
Note the keyword 'except'. This signals that you must find the option that does NOT fit the category.
Define 'endocrine gland' in your mind: a ductless gland that secretes hormones directly into the bloodstream.
Systematically evaluate each option against this definition.
Adrenal, Pituitary, and Thyroid glands all fit the definition of endocrine glands.
The Salivary gland secretes saliva through ducts into the mouth. Since it has ducts, it is an exocrine gland, making it the correct answer.

Concept Tested & Keywords

Concept Tested: Difference between endocrine and exocrine glands.
Stem keywords: endocrine glands, except
Lead-in keywords: except
Negative lead-in flag: The question uses the word 'except', asking to identify the option that does not belong to the group of endocrine glands.

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E6 Histology Inderbir 11e pp. 64-66, 152-154, 135-137

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