biology

Nurse cell

Nurse cell is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nurse cell rather than just read about it. In short: In general biology or reproductive physiology, a nurse cell is a cell which provides food, helps other cells and provides stability to neighboring cells. The term nurse cell is used in several unrelated ways in different scientific fields.

Key takeaways

Nurse cell belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nurse cell to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nurse cell from memory before moving on to harder problems.

Reference excerpt

In general biology or reproductive physiology, a nurse cell is a cell which provides food, helps other cells and provides stability to neighboring cells. The term nurse cell is used in several unrelated ways in different scientific fields.

Human physiology Nurse cells are specialized macrophages residing in the bone marrow that assist in the development of red blood cells. They absorb the nuclei of immature red blood cells and may provide growth factors to help the red blood cells mature. In the bone marrow, immature red blood cells (erythroblasts) can be seen grouped in a cluster around a nurse cell. The epithelial cell found in the cortex of the thymus is also called a "nurse cell." These cells produce Thymic hormones that cause T lymphocytes to mature and differentiate.

Parasitology In parasitology, a nurse cell is an infected cell in the disease trichinosis discovered by Dickson Despommier. A trichinella larva enters a cell and develops there, probably as a way of concealing itself from the immune system. The parasite has evolved a way of stimulating blood vessel development around the cell, in order to receive the nutrients it needs. In trichinosis, nurse cells are invariably skeletal muscle cells; these are the only type of cell that can support the parasite.

Mycology In mycology, a nurse cell is any hyphae that supplies food material to spores that have detached from the basidia; used especially in reference to taxa from the family Sclerodermataceae.

Cell biology

In respect to invertebrates, nurse cells are polytenic germline cells that contribute to the development of the oocyte, producing multiple nuclei. In fruit flies (Drosophila), nurse cells surround the developing oocyte and synthesize proteins and RNAs that are to be deposited in it. Nurse cells are highly polyploid (up to 8000C). They dump their cytoplasm, containing RNAs and proteins, into the oocyte via ring canals. Due to their high metabolic activity, nurse cells likely experience the DNA damaging effect of oxidative free radicals produced as a byproduct of this metabolism. This damaging effect would otherwise befall the DNA of the egg cells if they were responsible for their own synthesis. The many genome copies in each nurse cell may provide redundancy of genetic information that would allow the nurse cell to carry out its provisioning function even in the face of considerable oxidative DNA damage.

See also Angiogenesis Sertoli cell Thymic nurse cell

References

Worked examples

Example 1 — a first encounter with Nurse cell

Start with the simplest possible case. Write down what Nurse cell claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nurse cell before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nurse cell ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nurse cell

In research: Nurse cell appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nurse cell in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nurse cell is common in secondary-school and first-year university syllabi. It links to neighbouring topics Parasitology, so understanding it makes those chapters shorter.
In everyday life: Look for Nurse cell outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nurse cell in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nurse cell means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nurse cell out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nurse cell in simple terms?

Why does Nurse cell matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nurse cell?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nurse cell.