VASCULAR SYSTEM QUESTIONS
<ul><li>1.  The HEART maintains a double circulation of the blood around the body </li></ul><ul><li>DRAW & LABEL A DIAGRAM...
<ul><li>RA RV </li></ul>PULMONARY ARTERY LUNGS LV LA BODY (VENULES) (CAPILLARIES) (ARTERIOLES) AORTA PULMONARY VEINS (VENU...
2. What is meant by the terms Systole and Diastole? Systole – Contraction of the hear (0.3) Diastole – Relaxation of the h...
What is BLOOD PRESSURE & How is it measured? BLOOD PRESSURE = BLOOD FLOW X RESISTANCE TO FLOW or PRESSURE EXERTED BY BLOOD...
What is the major factor affecting blood pressure? <ul><li>Exercise and the Cross Sectional Area of the vessels. (The bigg...
<ul><li>What is the average blood pressure for a young adult? </li></ul><ul><li>120 (systolic) </li></ul><ul><li>80 (diast...
<ul><li>What is venous return? </li></ul><ul><li>The blood returning to the heart via the veins. </li></ul>
<ul><li>Describe the route that blood takes from the left atrium via the gastrocnemius? Describe the changes in oxygen and...
<ul><li>Draw and label a diagram to show basic structure of a vein. </li></ul>Large lumen Thin walls Valves
<ul><li>Three factors that help maintain Venous Return </li></ul>SKELETAL MUSCLE PUMP (MUSCLES CONTRACT TO SQUEEZE BLOOD B...
<ul><li>Describe the changes in velocity as blood travels from the aorta to the capillaries and back to the right atrium. ...
<ul><li>Name the vessels & structures primarily responsible for controlling blood pressure & blood flow. </li></ul><ul><li...
<ul><li>. </li></ul>Sketch a diagram to help explain how more blood is redistributed to the working muscles.  What is this...
<ul><li>What controls blood flow and blood pressure? </li></ul><ul><li>Vasomotor Control in the medulla oblongata of the b...
<ul><li>Give one STRUCTURAL and one FUNCTIONAL difference between arteries capillaries and veins. </li></ul><ul><li>Arteri...
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  1. 1. VASCULAR SYSTEM QUESTIONS
  2. 2. <ul><li>1. The HEART maintains a double circulation of the blood around the body </li></ul><ul><li>DRAW & LABEL A DIAGRAM TO SHOW THE 2 CIRCULATORY NETWORKS </li></ul><ul><li>(5) </li></ul>
  3. 3. <ul><li>RA RV </li></ul>PULMONARY ARTERY LUNGS LV LA BODY (VENULES) (CAPILLARIES) (ARTERIOLES) AORTA PULMONARY VEINS (VENULES) (CAPILLARIES) (ARTERIOLES)
  4. 4. 2. What is meant by the terms Systole and Diastole? Systole – Contraction of the hear (0.3) Diastole – Relaxation of the heart (0.5)
  5. 5. What is BLOOD PRESSURE & How is it measured? BLOOD PRESSURE = BLOOD FLOW X RESISTANCE TO FLOW or PRESSURE EXERTED BY BLOOD ON WALLS OF BLOOD VESSELS Measured by a SPHYGOMOMANOMETER
  6. 6. What is the major factor affecting blood pressure? <ul><li>Exercise and the Cross Sectional Area of the vessels. (The bigger the CSA the slower the flow) </li></ul>
  7. 7. <ul><li>What is the average blood pressure for a young adult? </li></ul><ul><li>120 (systolic) </li></ul><ul><li>80 (diastolic) </li></ul><ul><li>High pressure is anything above 140 </li></ul><ul><li>90 </li></ul><ul><li>And is called HYPERTENSION </li></ul>
  8. 8. <ul><li>What is venous return? </li></ul><ul><li>The blood returning to the heart via the veins. </li></ul>
  9. 9. <ul><li>Describe the route that blood takes from the left atrium via the gastrocnemius? Describe the changes in oxygen and CO2 concentration that would occur . </li></ul><ul><li>L.Atrium – mitral valve – l.ventricle – aorta – gastrocnemius – inferior/superior venae cavae. </li></ul><ul><li>Oxygenated blood is carried through haemoglobin to the capillary network. Oxygen is taken in CO2 is then released into the venules then the veins then to the lungs. </li></ul>
  10. 10. <ul><li>Draw and label a diagram to show basic structure of a vein. </li></ul>Large lumen Thin walls Valves
  11. 11. <ul><li>Three factors that help maintain Venous Return </li></ul>SKELETAL MUSCLE PUMP (MUSCLES CONTRACT TO SQUEEZE BLOOD BACK TO THE HEART) VALVES/DIRECT BLOOD FLOW BACK TO THE HEART/PREVENT BACKFLOW. RESPIRATORY PUMP
  12. 12. <ul><li>Describe the changes in velocity as blood travels from the aorta to the capillaries and back to the right atrium. </li></ul><ul><li>As blood travels through the aorta into smaller arteries/arterioles/capillaries the CSA gets smaller therefore decreasing the velocity of blood. </li></ul>
  13. 13. <ul><li>Name the vessels & structures primarily responsible for controlling blood pressure & blood flow. </li></ul><ul><li>Arteries and Arterioles – Vasodilation/constriction </li></ul><ul><li>Vasoconstriction – Reduces blood flow to inactive organs </li></ul><ul><li>Vasodilation – increases blood flow to active muscles </li></ul>
  14. 14. <ul><li>. </li></ul>Sketch a diagram to help explain how more blood is redistributed to the working muscles. What is this known as? VASCULAR SHUNTING
  15. 15. <ul><li>What controls blood flow and blood pressure? </li></ul><ul><li>Vasomotor Control in the medulla oblongata of the brain. </li></ul>
  16. 16. <ul><li>Give one STRUCTURAL and one FUNCTIONAL difference between arteries capillaries and veins. </li></ul><ul><li>Arteries – take blood away from the heart/thick muscular walls </li></ul><ul><li>Capillaries – smallest of blood vessels/thin/gaseous exchange </li></ul><ul><li>Veins – carry deoxygenated blood/valves </li></ul>

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