The structures that are intracellular areas with specific functions are called?

Appeared in: NHM UP Staff Nurse - 2016

Explanation

The term for intracellular structures with specific, vital functions is 'organelles,' which means 'little organs.'.
These structures are distinct, often membrane-bound compartments within the cytoplasm.
Examples include the nucleus (genetic control), mitochondria (energy production), and ribosomes (protein synthesis).
Each organelle performs a unique job essential for the cell's survival, growth, and reproduction.

Option A: Inclusions are non-functional, non-living materials stored in the cytoplasm, such as glycogen or lipid droplets. They lack the complex structure and active metabolic role of organelles.
Option B: Organs (like the heart or liver) are large-scale structures composed of multiple tissues and are found in multicellular organisms. They are not intracellular.
Option D: Macromolecules (like proteins, lipids, and DNA) are the chemical building blocks of cells and organelles, not the functional structures themselves.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition of Cellular Organelles as background academic context rather than a clinical decision trigger.
Many genetic and acquired diseases are linked to organelle dysfunction. For example, lysosomal storage diseases (like Tay-Sachs) result from defects in lysosomal enzymes, leading to the toxic accumulation of substances within cells.
Pharmacology often targets specific organelles. For instance, some antibiotics work by inhibiting bacterial ribosomes, preventing them from making essential proteins.
What if? If a patient presents with unexplained muscle weakness and fatigue, a nurse should recognize these as potential signs of mitochondrial dysfunction. This could prompt further investigation into metabolic or genetic disorders affecting cellular energy production.

How to Approach the Question

First, break down the question's key phrases: 'intracellular' means 'inside the cell,' and 'specific functions' means they have a dedicated job.
Next, evaluate each option against these criteria.
Consider 'Organs.' Are they inside a single cell? No, they are large body parts. Eliminate this option.
Consider 'Macromolecules.' Are they functional structures? No, they are the building materials. Eliminate this option.
Now compare 'Inclusions' and 'Organelles.' Both are intracellular. The key differentiator is 'specific functions.'
Recall that inclusions are passive storage units, while organelles are active, functional 'little organs.' Therefore, 'Organelles' is the best fit for the definition.

Concept Tested & Keywords

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

Practise the full NHM UP Staff Nurse - 2016

Attempt every question from this paper in a timed mock, then review the full solution for each one.