When Ms. Smith exercises vigorously (for a long time), her muscle cells are unable to obtain oxygen from the blood quickly enough. Her muscles cells.....
*
Captionless Image
send signals to the brain telling it to shut the muscles down.
stop functioning properly, resulting in death.
start anaerobic respiration, producing lactic acid buildup.
start anaerobic respiration, producing lactic acid buildup.
start anaerobic respiration, producing lactic acid buildup.
The correct answer is: start anaerobic respiration, producing lactic acid buildup.
When Ms. Smith exercises vigorously for a long time, her muscle cells may not receive enough oxygen from the blood to meet their energy demands. In response to this lack of oxygen, the muscle cells switch to an alternate mode of energy production called anaerobic respiration.
During anaerobic respiration, the muscle cells break down glucose in the absence of oxygen to produce energy. However, this process is less efficient and leads to the accumulation of lactic acid as a byproduct. The lactic acid buildup contributes to muscle fatigue and can cause a burning sensation or muscle cramps.
It's important to note that this physiological response is temporary, and once Ms. Smith rests and gets sufficient oxygen, her muscle cells will return to aerobic respiration, where oxygen is the primary source of energy.