CBSE · Class 7 · Science · Respiration in OrganismsWhat accumulates in our muscles during heavy exercise, causing muscle cramps?
Step-by-Step Solution
During heavy exercise, muscle cells respire anaerobically when oxygen supply is insufficient, leading to the partial breakdown of glucose and accumulation of lactic acid, which causes cramps.
Detailed Options Breakdown
Option : Carbon dioxide
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Respiration in Organisms.
Option 1: Alcohol
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Respiration in Organisms.
Option 2: Lactic acid (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: Water
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Respiration in Organisms.
💡 Study Guide: This question tests core syllabus concepts from Respiration in Organisms. For formulas, key summaries, and mock exam reference guides, read the full Respiration in Organisms Revision Notes.