Question

name
biological feedback investigation
ls1 - 3: i can plan and conduct an investigation to provide evidence that feedback mechanism maintains homeostasis.

1. question / problem: how will increasing body movement (muscle contractions) create feedback by the human body?

a. we will be observing heart rate (beats per minute) and breathing rate (breaths per minute) as our bodys feedback.

1. hypothesis: if my muscles move fast enough, then the heart rate / breathing rate will ______ because...

Explanation:

When muscles move (contract) more vigorously (fast enough), the body's cells require more oxygen to produce energy (through cellular respiration) and also need to get rid of more carbon dioxide (a waste product of cellular respiration). The heart (cardiovascular system) responds by pumping blood faster (increasing heart rate) to deliver more oxygen - rich blood to the muscles and remove carbon dioxide. The lungs (respiratory system) respond by increasing the breathing rate to take in more oxygen and expel more carbon dioxide.

Answer:

If my muscles move fast enough, then the heart rate / breathing rate will increase because the body needs to supply more oxygen to the working muscles (for cellular respiration to produce energy) and remove more carbon dioxide (a waste product of cellular respiration).