Starter Qs 1. The diagram below shows some blood vessels within muscle tissue of an athlete. The direction of blood flow is indicated by the arrows. a) X = artery/arteriole; Y = capillary Name the type of blood vessels labelled X and Y (1) Name two substances which are at a higher concentration in the blood at point P than at point S. (1) Tissue fluid surrounds the muscle cells. Some of this fluid is reabsorbed into the bloodstream. How else is tissue fluid removed from around the muscle cells? (1) b) oxygen, glucose, amino acids, fatty acids, glycerol, vitamins, minerals 1a) X = artery/arteriole; Y = capillary 1b) oxygen, glucose, amino acids, fatty acids, glycerol, vitamins, minerals 1c) By the lymphatic system / lymphatic vessels / lymphatic capillaries / lymph. c) By the lymphatic system / lymphatic vessels / lymphatic capillaries / lymph.

Calculations CO = HR x SV A: 5.8/60 = 0.09 B: 6.1/68 = 0.08 C: 7.2/72 = 0.1 D: 7.6/78 = 0.09 ANSWER: C HR x SV 80 x 120 =

Calculations CO = HR x SV The graph below shows how pulse rate and stroke volume change with the rate of oxygen uptake What is the cardiac output when the oxygen uptake is 0.6 L/min ? What is the cardiac output when the oxygen uptake is 1.6 L/min? 2006 old HB

Calculations CO = HR x SV The graph below shows how pulse rate and stroke volume change with the rate of oxygen uptake What is the cardiac output when the oxygen uptake is 0.6 L/min ? When oxygen uptake = 0.6… HR = 80 and SV = 120 BUT we need to change 120 cm3 into L (/1000) CO = HR x SV CO = 80 x 0.12 CO = 9.6 L/min HR x SV 80 x 120 =

Calculations CO = HR x SV The graph below shows how pulse rate and stroke volume change with the rate of oxygen uptake What is the cardiac output when the oxygen uptake is 1.6 L/min ? When oxygen uptake = 1.6… HR = 110 and SV = 150 BUT we need to change 150 cm3 into L (/1000) CO = HR x SV CO = 110 x 0.15 CO = 16.5 L/min HR x SV 80 x 120 =

Starter Qs 1. 2.

Quick Check - PPQs… Answer = A Answer = B

Starter Qs 1. 2.

The person’s heart beat is: ______ bpm Answer = B The person’s heart beat is: ______ bpm

Starter Qs For each statement below decide if it is true or false. For every false statement, correct the underlined word: 1. Another term for the pacemaker is the atrio-ventricular node 2. The atrio-ventricular node is located in the right atrium muscular wall 3. During ventricular systole, the pressure decreases 4. During ventricular systole, the volume of blood in the heart increases 5. During diastole, the AV valves are opened. Sino-atrial node Junction between atria and ventricles Diastole Decreases

C A C