Question

Required information An experiment was performed in which a healthy subject engaged in three exercises, with instrumentation in place to control and measure a variety of physiological variables. The data collected are shown in the table below. Part 5 of 7 Exercise Respiratory rate Tidal volume Dead space Heart rate Cardiac stroke volume Systemic artery Po2 Pulmonary artery Po2 Hematocrit Exercise #1 22 breaths/min 700 mL/breath 130 mL 153 beats/min 80 mL/beat 100 mmHg 40 mmHg 45% Exercise #2 25 breaths/min 610 mL/breath 130 ml 136 beats/min 90 mL/beat 100 mmHg 20 mmHg 45% Exercise #3 18 breaths/min 850 mL/breath 130 mL 144 beats/min 85 mL/min 100 mmHg 30 mmHg 45% Rank the systemic arterial O2 transport rate during the three exercise experiments from highest to lowest.

Answer 1

Lung volumes

vital capacity is the maximum amount of air that can be breathed out after breathing in as much air as possible. Taking part in regular aerobic exercise has been shown to increase a person's vital capacity.

Tidal volume is the amount of air breathed in with each normal breath. The average tidal volume is 0.5 liters (500 ml).

Total lung capacity is the total amount of air that the lungs can hold after the biggest possible breath. The average total lung capacity is about 6 liters (6000 ml).

Exercise 3 has the highest systemic arterial O2 transport rate, exercise 1 has intermediate systemic arterial O2 transport rate, and exercise 2 has the lowest systemic arterial O2 transport rate