What is the main action of calcitonin?

It lowers blood calcium and phosphate levels by inhibiting bone resorption (breakdown) and increasing their excretion by the kidneys.

Is calcitonin still commonly used as a drug?

Its clinical use has declined significantly with the advent of more potent and convenient osteoporosis treatments like bisphosphonates.

What does a high calcitonin level indicate?

It is a key tumour marker for medullary thyroid carcinoma (MTC), a type of thyroid cancer.

How does calcitonin differ from parathyroid hormone (PTH)?

They have opposing actions. Calcitonin lowers blood calcium, while PTH raises it by stimulating bone resorption and calcium reabsorption in the kidneys.

calcitonin

C2/Technical

UK/ˌkælsɪˈtəʊnɪn/US/ˌkælsɪˈtoʊnɪn/

Technical/Scientific

My Flashcards

Definition

Meaning

A hormone, produced in the thyroid gland, which regulates calcium and phosphate levels in the blood by inhibiting bone resorption.

In clinical contexts, a synthetic form of this hormone used as a drug to treat conditions like osteoporosis and Paget's disease of bone.

Linguistics

Semantic Notes

Exclusively used in medical, physiological, and biochemical contexts. It is functionally antagonistic to parathyroid hormone (PTH).

Dialectal Variation

British vs American Usage

Differences

No significant lexical differences. The conceptual context and terminology are identical.

Connotations

Purely denotative; a precise biological term with no cultural connotations.

Frequency

Used with identical frequency in relevant professional fields in both regions.

Vocabulary

Collocations

strong

calcitonin levelscalcitonin secretioncalcitonin genecalcitonin receptorcalcitonin therapyserum calcitonin

medium

administer calcitoninproduce calcitoninsynthetic calcitoninresponse to calcitonin

weak

high calcitoninlow calcitonintest for calcitonin

Grammar

Valency Patterns

The thyroid gland secretes calcitonin.Calcitonin inhibits osteoclast activity.Patients were treated with calcitonin.

Vocabulary

Synonyms

Neutral

thyrocalcitonin

Weak

calcium-regulating hormone (descriptive, not a true synonym)

Vocabulary

Antonyms

parathyroid hormone (PTH)hypercalcemic agent

Usage

Context Usage

Business

Not used.

Academic

Central in endocrinology and bone metabolism research papers.

Everyday

Virtually never used.

Technical

Used in medical diagnostics, pharmacology, and clinical treatment guidelines.

Examples

By Part of Speech

adjective

British English

calcitonin-based treatment
the calcitonin assay

American English

calcitonin-related peptide
a calcitonin test

Examples

By CEFR Level

Calcitonin is an important hormone for bones.

Doctors may measure calcitonin levels to help diagnose certain thyroid conditions.

The therapeutic efficacy of synthetic calcitonin in managing acute bone pain was demonstrated in the cohort study.

Learning

Memory Aids

Mnemonic

Think: 'CALCIum TONes it dowN' – it tones down calcium levels in the blood.

Conceptual Metaphor

A BIOLOGICAL THERMOSTAT FOR CALCIUM.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Direct cognate 'кальцитонин' is correct. No trap.

Common Mistakes

Confusing calcitonin with calcitriol (active vitamin D).
Misspelling as 'calcitronin' or 'calcitonine'.
Misstating its source (thyroid, not parathyroid).

Practice

Quiz

Fill in the gap

A key function of is to lower blood calcium levels by inhibiting bone breakdown.

Multiple Choice

Calcitonin is primarily produced by which of the following?

FAQ

Frequently Asked Questions

: It lowers blood calcium and phosphate levels by inhibiting bone resorption (breakdown) and increasing their excretion by the kidneys.
: Its clinical use has declined significantly with the advent of more potent and convenient osteoporosis treatments like bisphosphonates.
: It is a key tumour marker for medullary thyroid carcinoma (MTC), a type of thyroid cancer.
: They have opposing actions. Calcitonin lowers blood calcium, while PTH raises it by stimulating bone resorption and calcium reabsorption in the kidneys.