Definition

1. Noun (Physiology): A state of abnormally low tension or tone, particularly in muscular tissue.
2. Noun (Chemistry/Biology): The property of a solution having a lower osmotic pressure (lower solute concentration) than another specified solution, typically a bodily fluid like blood or cytoplasm.

Usage Examples

• Noun (Physiology):
  • The infant's muscle hypotonicity was a key symptom noted by the pediatrician.
  • The neurological disorder caused generalized hypotonicity, making it difficult for the patient to maintain posture.
• Noun (Chemistry/Biology):
  • The hypotonicity of the intravenous fluid caused water to move into the patient's red blood cells.
  • When a cell is placed in a solution with significant hypotonicity, it may swell and potentially lyse.

Advanced Usage

• Comparative Hypotonicity: The term is often used in a comparative sense. A solution is described as having relative to another (e.g., "The external solution showed compared to the cell's cytoplasm").
• Clinical Context: In medicine, is a diagnostic finding. "The patient presented with " is a standard clinical observation for conditions affecting muscle or nerve function.

Variants and Related Words

• Hypotonic (adjective): Describing the state of having low tone or low osmotic pressure.
  • The patient had hypotonic muscles.
  • A hypotonic solution was administered.
• Hypotonia (noun): A near-synonym in a medical/physiological context, specifically referring to decreased muscle tone.
  • Benign congenital hypotonia is a condition in infants.

Synonyms

• (Physiology): Flaccidity, low tone, atonia (in specific contexts).
• (Solution): Low osmotic pressure, low solute concentration (relative term).

Antonyms

• (Physiology): Hypertonicity, spasticity, rigidity.
• (Solution): Hypertonicity (higher osmotic pressure), isotonicity (equal osmotic pressure).

Noun

1. (of muscular tissue) the state of being hypotonic
2. (of a solution) the extent to which a solution has a lower osmotic pressure than some other