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- 1. Multiple Choice
Which is NOT an anatomical structures of the CV system?
Blood
Blood vessels
periosteum
Heart
- 2. Multiple Choice
Which blood vessels carry blood to or from the lungs?
superior vena cava
aorta
pulmonary artery
pulmonary vein
- 3. Multiple Choice
When the heart is in systolic phase it is contracting, true or false?
true
false
- 4. Multiple Choice
What is the pacemaker of the heart?
SA Node
AV Node
Perkinje Fibres
Bundles of His
- 5. Multiple Choice
What causes a delay in the electrical activation of the heart?
SA Node
AV node
Perkinje Fibres
Bundle of His
- 6. Multiple Choice
Which section of the blood vessel contains the smooth muscle?
Adventitia
Tunic Externia
Tunic Media
Tunic Intima
- 7. Multiple Choice
How many cells thick are capillaries?
1
2
3
4
- 8. Multiple Choice
How do veins aid venous return to the heart?
non return valves
narrow lumen
thick tunic media
muscles squeeze blood back towards the heart
- 9. Multiple Choice
How are erythrocytes designed to carry O2?
high heamoglobin content
Anuclear
Move in ameboid fashion
biconcave disk
- 10. Multiple Choice
Approximately what is the hematocrit in humans?
30-35%
35-40%
40-45%
45-50%
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