LO1 - The Cardiovascular System

Question 1

What are the two types of cholesterol ?

Answer 1

HDL’s - GOOD
LDL’s - BAD

Question 2

What cell prevents infections ? - name all three

Answer 2

White blood cell’s
- lymphocytes
- neutrophils
- monocytes

Question 3

Arteries

Answer 3

Takes blood away from the heart

Question 4

Veins

Answer 4

Takes blood into the heart

Question 5

Pulmonary artery

Answer 5

Takes blood out your heart to the lungs

Question 6

Pulmonary veins

Answer 6

Brings blood from the lungs to the heart

Question 7

Vena cava

Answer 7

Deoxygenated blood from the body’s organs returns to the heart in this main vein

Question 8

Atrio-ventricular valves

Answer 8

Only open in one direction to make sure a one way system is created so then blood always moves forward from the atria to the ventricles preventing back-flow

Question 9

Semi-lunar valves

Answer 9

Only open one direction to make sure a one way system is created so that blood always moves forward and is carried away from the heart preventing back-flow

Question 10

Purkyne fibres

Answer 10

Carry the current down the middle of the ventricles to the Apex of the heart

Question 11

The process of an ECG ?

Answer 11

P- Atrium contracting (SAN)
Q- slight delay (AVN)
R- ventricles contract (Pukryne fibres)
S- ventricles relax push blood out of the heart via arteries
T- atrium will start to refill with blood. New cycle beginning

Question 12

Hydrostatic pressure

Answer 12

Causes by your heart contracting > forces plasma out of the capillaries (diffusion) > capillaries > tissue fluid (cells) - urea, glucose, plasma

Question 13

Oedema

Answer 13

Build up of tissue fluid, skin swollen
- indication that they have a heart problem