alpha receptor: meaning, definition, pronunciation and examples
C2/TechnicalFormal, Scientific, Technical
Quick answer
What does “alpha receptor” mean?
A type of cell-surface receptor in the sympathetic nervous system that responds to the neurotransmitter noradrenaline (norepinephrine), classified as either alpha-1 or alpha-2.
Audio
Pronunciation
Definition
Meaning and Definition
A type of cell-surface receptor in the sympathetic nervous system that responds to the neurotransmitter noradrenaline (norepinephrine), classified as either alpha-1 or alpha-2.
In pharmacology and physiology, a class of adrenergic receptors mediating various physiological responses, such as vasoconstriction, smooth muscle contraction, and neurotransmitter release modulation. Their activation or blockade is the target of many drugs.
Dialectal Variation
British vs American Usage
Differences
Spelling is identical. Pronunciation may differ slightly (see IPA). The neurotransmitter is called 'noradrenaline' in UK medical texts and commonly 'norepinephrine' in US texts, which is reflected in related descriptions.
Connotations
Identical technical connotations in both variants.
Frequency
Equally rare in general discourse. Frequency is identical in specialized scientific literature globally.
Grammar
How to Use “alpha receptor” in a Sentence
The [drug] acts as an antagonist at the alpha receptor.Alpha receptor [activation/blockade] causes [effect].binding to the alpha receptorVocabulary
Collocations
Examples
Examples of “alpha receptor” in a Sentence
verb
British English
- The drug is known to alpha-receptor-block effectively.
- It preferentially alpha-receptor-agonises.
American English
- The medication alpha-receptor-blocks, causing vasodilation.
- This compound is designed to alpha-receptor-agonize.
adverb
British English
- The vessel constricted alpha-receptor-dependently.
- It binds primarily alpha-receptor-specifically.
American English
- The effect was mediated alpha-receptor-dependently.
- The agent acts alpha-receptor-selectively.
adjective
British English
- The alpha-receptor activity was measured.
- An alpha-receptor-mediated response.
American English
- The alpha-receptor response was significant.
- We observed alpha-receptor-specific binding.
Usage
Meaning in Context
Business
Not used.
Academic
Central term in pharmacology, physiology, and medicine. Used in research papers, textbooks, and lectures.
Everyday
Extremely rare. Might be encountered in patient information leaflets for blood pressure medications.
Technical
Primary context. Used in drug design, clinical trials, medical diagnoses, and physiological research.
Vocabulary
Synonyms of “alpha receptor”
Strong
Neutral
Weak
Vocabulary
Antonyms of “alpha receptor”
Watch out
Common Mistakes When Using “alpha receptor”
- Pronouncing 'receptor' with stress on the first syllable (/ˈriːsɛptə/).
- Using 'alpha receptor' without an article when it's countable (e.g., 'an alpha receptor').
- Confusing 'alpha receptor' with 'alpha wave' (brain activity).
FAQ
Frequently Asked Questions
Alpha-1 receptors are typically postsynaptic and cause vasoconstriction and smooth muscle contraction. Alpha-2 receptors are often presynaptic and act as autoreceptors to inhibit further noradrenaline release.
No, they are widely distributed. They are found in blood vessels, the urinary tract, the iris of the eye, the gastrointestinal tract, and the liver, among other tissues.
They are primarily used to treat high blood pressure (hypertension) and symptoms of an enlarged prostate (benign prostatic hyperplasia) by relaxing blood vessels and prostate muscle.
No, it is a highly technical term specific to medicine, pharmacology, and physiology. The average person would encounter it only in specific medical contexts.
A type of cell-surface receptor in the sympathetic nervous system that responds to the neurotransmitter noradrenaline (norepinephrine), classified as either alpha-1 or alpha-2.
Alpha receptor is usually formal, scientific, technical in register.
Alpha receptor: in British English it is pronounced /ˈælfə rɪˈsɛptə/, and in American English it is pronounced /ˈælfə rəˈsɛptər/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of the Greek letter Alpha (α) as the 'first' or 'A' type of adrenergic receptor, often involved in Arterial constriction.
Conceptual Metaphor
A LOCK AND KEY: The alpha receptor is the lock, and noradrenaline (or a drug) is the key that fits it to trigger a cellular response.
Practice
Quiz
What is the primary endogenous agonist for alpha receptors?