Circulatory System

Question 1

Pathway of Blood

Answer 1

1) Vena Cava
2) Right Atrium
3) Right ventricle
4) Pulmonary Artery
5) Lungs
6) Pulmonary veins
7) Left ventricle
8) aorta

Question 2

The right atrium of the heart receives

Answer 2

Deoxygenated blood from the body (through superior vena cava)

Question 3

Right ventricle of the heart sends

Answer 3

deoxygenated blood to the lungs (through the pulmonary artery)

Question 4

Left atrium receives

Answer 4

oxygenated blood from the lungs (pulmonary veins)

Question 5

Left ventricle sends

Answer 5

oxygenated blood to the body (through the aorta)

Question 6

Why are the left ventricle’s walls thicker?

Answer 6

Needs to pump much harder to send blood throughout the body.

Question 7

Tricuspid valve

Answer 7

Allows blood to flow from the right atrium to the right ventricle (3 heads)

Question 8

Bicuspid valve

Answer 8

allows blood to flow from the left atrium to the left ventricle (2 heads)

Question 9

What is Diastole

Answer 9

The relaxed phase of the cardiac cycle is when the chambers fill with blood

Question 10

What is systole

Answer 10

The phase where the heart muscle contracts and pumps blood

Question 11

1st phase of the cardiac cycle

Answer 11

Valves open which causes the filling of the atriums (Diastole)

Question 12

2nd phase of the cardiac cycle

Answer 12

Atrium contraction, filling the ventricles (Diastole)

Question 13

3rd phase of the cardiac cycle

Answer 13

Isovolumetric contraction- ventricles contract with no volume change (systole)

Question 14

4th phase of the cardiac cycle

Answer 14

Ejection phase- blood is pumped from the heart to the pulmonary and aortic valves. (systole)

Question 15

5th phase of the cardiac cycle

Answer 15

Isovolumetric relaxation- ventricles relax and both valves close (systole)

Question 16

What do veins possess that arteries do not

Answer 16

one-way valves that allow the blood to only flow towards the heart

Question 17

Vein cross-section properties

Answer 17

• Large lumen
• large endotellium

Question 18

branches of arteries

Answer 18

arterioles

Question 19

branches of veins

Answer 19

venules

Question 20

What do arteries possess that veins do not?

Answer 20

smooth muscle surrounding the endothelium

Question 21

Arteries responsible for

Answer 21

High conductance

Question 22

Arterioles responsible for

Answer 22

distribution

Question 23

capillaries responsible for

Answer 23

exchange

Question 24

veins responsible for(one word)

Answer 24

capacitance

Question 25

Artery cross-section properties

Answer 25

• Small lumen
• Large endothelium
• smooth muscle
• elastic tissue surrounding the lumen

Question 26

Arteriole cross-section properties

Answer 26

• Bigger lumen
• small endothelium
• Thick smooth muscle
• highly regulated by the nervous system

Question 27

systolic pressure definition

Answer 27

reached at peak of ventricular contraction (120/ top number)

Question 28

Diastolic pressure definition

Answer 28

minimum pressure after ventricle contraction (80/ bottom number)

Question 29

Filtration forces in Starling’s law of capillary filtration

Answer 29

Capillary pressure (Pc)
The osmotic pressure of interstitial space (pi i)

Question 30

Reabsorption forces in Starling’s law of capillary filtration

Answer 30

The osmotic pressure of capillary (pi c)
interstitial space pressure (Pi)

Question 31

When does filtration occur? Reabsorption?

Answer 31

• Filtration occurs when net filtration pressure is positive
• reabsorption occurs when net filtration is negative