On Fig. 3.1, add a label line and the letter X to show the muscular wall of the left ventricle.
Describe the route taken by blood as it travels from A to B in Fig. 3.1.
State the name of blood vessel C in Fig. 3.1.
Fig. 3.3 gives ECG results for the same person at these times: rest; during vigorous physical activity; one minute after physical activity; one hour after physical activity. Link each activity to its ECG using lines. Draw three lines. One line has already been completed for you.
State two additional methods by which the activity of the heart can be monitored.
Tick (✓) three statements that describe anaerobic respiration in humans. alcohol is made carbon dioxide is made glucose is needed lactic acid is made oxygen is needed gives out less energy per substrate molecule than aerobic respiration
State how vigorous exercise changes the rate and depth of breathing.