The structures called are intracellular areas with specific functions?

HPSSSB Staff Nurse - 2016

Applied Anatomy

Easy

Appeared in: HPSSSB Staff Nurse - 2016

Explanation

Organelles are specialized, often membrane-bound, structures found within the cytoplasm of eukaryotic cells.
Each organelle performs a specific function essential for the cell's survival, such as energy production, protein synthesis, or waste disposal.
The term itself means "little organs," highlighting their role as the functional compartments of a cell, analogous to the organs in a body.
Examples include the nucleus, which houses genetic material, and mitochondria, which generate energy (ATP).

Option A: Inclusions are non-living, passive substances within the cytoplasm, such as stored nutrients (e.g., glycogen granules, lipid droplets) or pigments. They lack the active, specific metabolic functions characteristic of organelles.
Option B: Organs are macroscopic structures (e.g., heart, lungs, liver) composed of multiple different tissues. They are part of a multicellular organism's body, not structures within a single cell.
Option D: Macromolecules are large organic molecules such as proteins, lipids, carbohydrates, and nucleic acids. They are the chemical building blocks of a cell and its organelles, not the functional compartments or "areas" themselves.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and identification of cellular organelles as background academic context rather than a clinical decision trigger.
Understanding organelle function is fundamental to pathophysiology. Many diseases, such as mitochondrial myopathies or lysosomal storage diseases (e.g., Tay-Sachs), are caused by malfunctioning organelles.
Pharmacology frequently involves targeting specific organelles. For instance, some chemotherapy drugs disrupt the function of microtubules (part of the cytoskeleton), while certain antibiotics target bacterial ribosomes to inhibit protein synthesis.
What if? - If a patient has a genetic defect affecting their peroxisomes, they could develop a condition like Zellweger syndrome. This leads to the accumulation of very-long-chain fatty acids, causing severe neurological, liver, and kidney problems.

How to Approach the Question

This is a factual recall question that tests your knowledge of basic cell biology definitions.
First, analyze the keywords in the question: "intracellular" (meaning inside a cell) and "specific functions" (meaning it has a particular job).
Next, evaluate each option against these two criteria.
Eliminate 'Organs' immediately, as they are multicellular structures, not intracellular.
Eliminate 'Macromolecules,' as they are the chemical building blocks, not the functional compartments.
Differentiate between the remaining two options: 'Inclusions' are for storage and are passive, while 'Organelles' are active, functional units.

Concept Tested & Keywords

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E6 Anatomy Grays 43e Vol 1 Part 1 pp. 31-33, 35-37, 37-39