8 Klass Biologija Dragomilov Laboratornaja Rabota 6 Spishi.ru Apr 2026

If your heart rate returns to near-resting levels within 3–5 minutes, your cardiovascular system is functioning normally. A slow recovery may indicate a lack of physical fitness. Evaluation of Results:

During physical activity, muscles require more oxygen and nutrients. The heart beats faster to pump blood more quickly to meet this demand and to remove carbon dioxide ( CO2cap C cap O sub 2 If your heart rate returns to near-resting levels

Sit down and measure your pulse again after 3 minutes of rest. Example: 75 bpm . Conclusion/Answers: The heart beats faster to pump blood more

Laboratory Work №6: Changes in Heart Rate (HR) During Physical Activity Measure your pulse for 15 seconds and multiply by 4

Sit quietly for 2–3 minutes. Measure your pulse for 15 seconds and multiply by 4. Example: 18 beats in 15 sec × 4 = 72 bpm . Activity: Perform 20 deep squats in 30–40 seconds.

Immediately measure your pulse for 15 seconds and multiply by 4. Example: 30 beats in 15 sec × 4 = 120 bpm .

Depending on your specific edition of the textbook, Laboratory Work №6 might alternatively be "The Composition of Inhaled and Exhaled Air." If your lab involves limewater and blowing through a straw, the answer is that exhaled air turns limewater cloudy because it contains more carbon dioxide than atmospheric air.