chemotaxis
LowTechnical/Scientific
Definition
Meaning
The movement of a cell or organism in response to a chemical stimulus.
In biology and medicine, the directed movement of cells (such as immune cells or bacteria) toward or away from a chemical gradient; a fundamental process in immune response, inflammation, and microbial behavior.
Linguistics
Semantic Notes
Used almost exclusively in biological, medical, and biochemical contexts. The term implies a directional response rather than random movement.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
None beyond the scientific meaning.
Frequency
Equally rare in both dialects, confined to specialist literature.
Vocabulary
Collocations
Grammar
Valency Patterns
The chemotaxis of [CELL TYPE] towards [CHEMICAL][CELL TYPE] exhibits chemotaxis in response to [STIMULUS]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Not used.
Academic
Common in biology, immunology, and microbiology research papers.
Everyday
Virtually never used.
Technical
Core term in laboratory protocols, medical diagnostics, and pharmacological research.
Examples
By Part of Speech
verb
British English
- The neutrophils will chemotax towards the site of infection.
- These bacteria are able to chemotax efficiently.
American English
- The white blood cells chemotax to the inflamed tissue.
- The pathogen chemotaxes toward nutrient sources.
adverb
British English
- The cells moved chemotactically up the concentration gradient.
- They migrated chemotactically.
American English
- The bacteria swam chemotactically toward the sugar.
- The response proceeded chemotactically.
adjective
British English
- The chemotactic behaviour of the amoeba was recorded.
- They observed a strong chemotactic response.
American English
- The chemotactic gradient guides the cells.
- They measured the chemotactic activity.
Examples
By CEFR Level
- This word is too difficult for A2 level.
- Scientists study how bacteria move toward food; this is called chemotaxis.
- Chemotaxis is an important idea in biology.
- The immune cells use chemotaxis to locate and move towards an infection.
- Positive chemotaxis means movement toward a chemical, while negative means movement away.
- Impaired leukocyte chemotaxis can be a sign of certain immunodeficiency disorders.
- The research paper detailed the molecular mechanisms underlying bacterial chemotaxis in complex environments.
Learning
Memory Aids
Mnemonic
Think 'CHEMical TAXI' – cells act like taxis, moving directionally toward a chemical 'fare'.
Conceptual Metaphor
Cells are scouts following a scent trail.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'химиотаксис' in non-scientific contexts; the term is highly specialised.
- Do not confuse with 'хеморецепция' (chemoreception), which is about detection, not movement.
Common Mistakes
- Misspelling as 'chemo*taxsis*' or 'chemotax*us*'.
- Using it to describe non-living systems.
- Confusing with 'chemokinesis' (non-directional speed change).
Practice
Quiz
What does 'negative chemotaxis' describe?
FAQ
Frequently Asked Questions
No, while commonly discussed for cells like bacteria or leukocytes, the concept can apply to larger organisms like worms or insect larvae moving in response to chemical cues.
Diffusion is the passive, random movement of molecules from high to low concentration. Chemotaxis is the active, directional movement of a whole cell or organism in response to a chemical gradient.
Yes, in pathology. For example, cancer cells can use chemotaxis to metastasize (spread to new areas), and some parasites use it to locate and invade hosts.
Commonly using assays like the Boyden chamber or under-agarose assay, where cells are placed near a chemical gradient and their directional migration is quantified.