Question

10 multiple choice 10 points if jeanna is swimming laps, what is happening in her musculoskeletal system? blood vessels in her muscles are widening to allow more blood flow. lactic acid is decreasing, causing her muscles to feel more fatigued. more blood is diverted to the liver and digestive systems to slow down. bones and muscles decrease in speed, causing body temperature to rise.

Explanation:

When a person is swimming laps (engaging in physical activity), the body needs more oxygen and nutrients. To meet this demand, blood vessels in the muscles widen (vasodilation) to allow more blood flow. Lactic acid increases (not decreases) during intense exercise and causes fatigue. During exercise, blood is diverted to muscles (not liver and digestive systems). Bones and muscles don't decrease in speed; rather, muscle contraction speed can increase during exercise and body temperature rises due to increased metabolic activity in muscles, not because bones and muscles slow down.

Answer:

Blood vessels in her muscles are widening to allow more blood flow.