Definition

Noun: A specialized sensory cell or structure that detects and responds to specific chemical substances in its environment, converting this chemical signal into a nerve impulse that is sent to the brain.

Usage

A "chemoreceptor" is a biological term used to describe a type of receptor in living organisms. It is typically used in scientific, medical, and biological contexts to explain how systems like taste, smell, and internal regulation (e.g., blood gas levels) function.

Examples

• Noun:
  • Taste buds on the tongue are a type of chemoreceptor that respond to molecules in food.
  • The chemoreceptors in the carotid artery monitor the levels of oxygen and carbon dioxide in the blood.
  • Insects use antennae packed with chemoreceptors to detect pheromones.

Advanced Usage

• Central vs. Peripheral Chemoreceptors: This distinction is important in physiology. Peripheral chemoreceptors (e.g., in the carotid and aortic bodies) detect changes in blood oxygen, carbon dioxide, and pH. Central chemoreceptors, located in the brainstem, primarily respond to changes in carbon dioxide levels in the cerebrospinal fluid to regulate breathing.

Variants and Related Words

• Chemoreception (n): The physiological process of detecting chemical stimuli.
• Chemosensory (adj): Relating to the perception of chemical stimuli.

Synonyms

• Chemical sensor: A more general, sometimes technical term.
• Sensory receptor: A broader category that includes chemoreceptors as well as receptors for light, pressure, temperature, etc.

Related Phrases / Collocations

• Oxygen chemoreceptor: Specifically detects oxygen levels.
• Carbon dioxide chemoreceptor: Specifically detects carbon dioxide.
• Olfactory chemoreceptor: A chemoreceptor involved in the sense of smell.
• Gustatory chemoreceptor: A chemoreceptor involved in the sense of taste.

Noun

1. a sensory receptor that responds to chemical stimuli