A Sustained Muscle Contraction Due to a Lack of Relaxation

question 43

Multiple Choice

A sustained muscle contraction due to a lack of relaxation between successive stimuli is called

• A)tonus.
• B)tetanus.
• C)an all-or-none response.
• D)fatigue.
• E)a spasm.

---

Definitions:

ATP

Adenosine triphosphate, a high-energy molecule found in the cells of the human body, serving as a primary energy carrier.

Lemon Juice

A tart, acidic liquid obtained from lemons, widely used in cooking and beverages for its flavor and high vitamin C content.

Household Ammonia

A cleaning solution made from diluting ammonia gas in water, widely used as a disinfectant and cleaner.

Catabolic

Relating to or involving the breakdown of complex molecules into simpler ones, often with the release of energy, part of the metabolic process.