cytoplasm
Let an agent explain the cytoplasm and its components, distinguish cytoplasm from cytosol, nucleus and specialised regions, relay facts from cell biology references, and route detailed biochemical questions to the relevant entries.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain the cytoplasm and its components, distinguish cytoplasm from cytosol, nucleus and specialised regions, relay facts from cell biology references, and route detailed biochemical questions to the relevant entries.
The material within a living cell enclosed by the cell membrane, excluding the nucleus in eukaryotes: the cytosol, a water-based solution of ions, small molecules and proteins, together with the organelles, cytoskeleton and inclusions suspended in it; the site of most metabolism, protein synthesis and transport within the cell.
What it is for: Not for anything; the internal medium of the cell.
It can be explain composition and organisation; distinguish cytoplasm from cytosol and nucleoplasm; explain roles in metabolism and transport; route to organelle and pathway entries.
Distinguishing features
Bounded by the cell membrane
Excludes the nucleus in eukaryotes
Contains cytosol, organelles and cytoskeleton
Crowded, gel-like and dynamic
What it looks like
Not visible to the eye; under the microscope a translucent gel with organelles and granules.
Physical character
water content: about 70-80 percent
pH: about 7.2 pH - cytosol
fraction of cell volume: about 50-80 percent - varies by cell type
How it is recognised
Everything inside the membrane except the nucleus
Cytosol plus organelles and cytoskeleton
The nucleoplasm and the extracellular matrix are outside it
Related models
is a kind of - part of the cell
contains - suspended structures
is contrasted with - excluded from the cytoplasm
is bounded by - the outer limit
In practice
Families and kinds
cytosol
organelles such as mitochondria and endoplasmic reticulum
cytoskeleton
inclusions such as glycogen and lipid droplets
specialised regions such as the cell cortex, sarcoplasm and ooplasm
prokaryotic cytoplasm without membrane-bound organelles
Identifiers
Gene Ontology GO:0005737 cytoplasm
UBERON or CL terms per context cell ontology
Standards and regulation
Gene Ontology and cell ontology definitions
Failure modes and hazards
Confusing cytoplasm with cytosol
Treating it as a uniform fluid
Outdated textbook simplifications
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.cytoplasm
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Structure What the cytoplasm is.
Definition.
Definition
Definition and boundaries.
Definition
Definition.
- What does the cytoplasm include and exclude, and how does it differ from the cytosol? definition
- Is the question about the cytoplasm, the cytosol or the nucleus? boundary
Components
Components.
Components
Components.
- What organelles, cytoskeleton and inclusions does it contain, and how are they organised? definition
- Which entry fits a specific organelle? action
Function What happens there.
Physiology.
Metabolism
Metabolism and synthesis.
Metabolism
Metabolism.
- Which metabolic and synthetic processes take place in the cytoplasm? provenance
- Which entry fits a specific pathway? action
Transport
Transport and signalling.
Transport
Transport.
- How do transport, streaming and signalling work in the cytoplasm? provenance
- Which references are standard? provenance
Properties Physical properties.
Physics.
Composition
Composition.
Composition
Composition.
- What is the composition of the cytoplasm, and how is it measured? measurement
- How does it vary by cell type? measurement
Physics
Crowding and phases.
Physics
Physics.
- What do studies say about crowding, viscosity and phase separation, with findings attributed? provenance
- Which entry fits biomolecular condensates? action
Study Comparison and teaching.
Study.
Comparison
Prokaryotes and specialised cells.
Comparison
Comparison.
- How does the cytoplasm differ in prokaryotes, muscle cells and eggs? provenance
- Which entry fits the specific cell type? action
Teach
Teaching.
Teach
Teaching.
- How is the cytoplasm taught, and which misconceptions arise? provenance
- Which entry fits cell biology? action
What the second pass must settle
- Should cytosol be a separate entry?
- How should ontology terms be linked?
- The registry entry has merged aliases for specialised regions; should they be split off?