Circulatory System

Question 1

What 3 things do all cells require

Answer 1

Oxygen
Nutrients
Release of waste product

Question 2

Circulatory system

Answer 2

Organ system responsible for transport of oxy nut and waste

Question 3

4 main components of circulatory system

Answer 3

Arteries
Capillaries
Veins
Heart

Question 4

RBC

Answer 4

Carrier of oxygen and carbon dioxide

Question 5

What special protein do RBCs contain?

Answer 5

Hemoglobin

Question 6

Hemoglobin

Answer 6

Uses 4 iron ions as cofactors to bind oxygen and carbon dioxide

Question 7

What is blood circulated through?

Answer 7

Blood vessels

Question 8

What includes blood vessels?

Answer 8

Arteries
Capillaries
Veins

Question 9

Arteries

Answer 9

Blood vessels that carry blood away from heart

Question 10

Which blood vessel has thick walls and is very elastic and why?

Answer 10

Arteries

To withstand pulses of pressure from the heart

Question 11

Vasodilation

Answer 11

Increase in diameter of blood vessel
Increased blood flow

Question 12

Vasoconstriction

Answer 12

Decrease in diameter of blood vessel
Decreased blood flow

Question 13

Pulse

Answer 13

Cycle of vaso dilation and constriction as heart pumps blood to arteries

Question 14

Aneurysm

Answer 14

When artery walls thin or weaken and pressure from pulse causes bulge

Question 15

Which artery carries deoxygenated blood?

Answer 15

Pulmonary artery

Question 16

Capillaries

Answer 16

Tiny blood vessels in tissue

Question 17

Which blood vessel contains no muscles?

Answer 17

Capillariee

Question 18

What are capillaries the site for?

Answer 18

Nutrient and gas exchange btw blood and cells

Exchanged through diffusion

Question 19

Veins

Answer 19

Blood vessels that carry blood towards the heart (usually comes from capillaries)

Question 20

Venous valves

Answer 20

Ensure that blood doesn’t move backwards in veins

Question 21

What helps move blood through venous valves in veins?

Answer 21

Muscle contractions

Question 22

Do veins carry oxygenated or deoxygenated blood? Which is the exception?

Answer 22

Deoxygenated blood

Pulmonary vein

Question 23

Varicose veins

Answer 23

Pooling of blood stretches and twists vessels due to weakened venous valves

Question 24

Where do varicose veins occur?

Answer 24

Legs

Question 25

Hemorrhoids

Answer 25

Varicose veins that occur along rectum

Question 26

What do veins do when body temp too high?

Answer 26

Veins near surface expand Blood near surface exchanges heat with environment cooling person down

Question 27

What do veins do when environment too cold?

Answer 27

Veins near body surface constrict so blood doesn’t lose heat to environment

Question 28

What do the pulmonary artery and vein service

Answer 28

Lungs

Question 29

What do carotid artery and jugular vein service?

Answer 29

Brain

Question 30

What do subclavian artery and vein service?

Answer 30

Arms

Question 31

What does femoral artery and vein service?

Answer 31

Legs

Question 32

Heart

Answer 32

Organ responsible for pumping blood throughout circulatory system

Question 33

What separates the left atrium/ventricle from the right side?

Answer 33

Septum

Question 34

Atria

Answer 34

Smaller chambers that receive blood from body

Question 35

Ventricles

Answer 35

Large extremely muscular chambers that pump blood out of heart and to the body

Question 36

Where does deoxygenated blood enter the heart from?

Answer 36

Enters right atrium through one of 2 vena cava veins

Question 37

Superior vena cava

Answer 37

Carries blood that arrives from above heart such as jugular or subclavian veins

Question 38

Inferior vena cava

Answer 38

Carries blood that arrives from below heart such as femoral vein

Question 39

How does blood pass from right atrium to ventricle?

Answer 39

Atrioventricular valve

Question 40

AV valves

Answer 40

Ensure blood being pushed by ventricles doesn’t move back into atria

Question 41

Semilunar valve

Answer 41

Prevent pumped blood from flowing back into ventricle

Question 42

How is the heartbeat created?

Answer 42

By nodes (sinoatrial and AV nodes)

Question 43

Sinoatrial node

Answer 43

Receives electric signals from brain causing atria to contract

Question 44

Atrioventricular node

Answer 44

Receives electric signals from SA nodes causing ventricles to contract

Question 45

Electrocardiograms and each part

Answer 45

Map electrical current during heartbeat P wave indicates contraction of atria QRS wave indicates contraction of ventricles T wave indicates reset of chambers prior to next heartbeat

Question 46

Lubb and how it’s caused

Answer 46

1st sound of heartbeat Caused when ventricles contract closing AV valves

Question 47

Dubb and how it’s caused

Answer 47

2nd sound of heartbeat Caused by closing of semilunar valve after ventricles relax allowing blood to flow back slamming into semilunar valve

Question 48

Heart murmur

Answer 48

When valves don’t close right and blood leaks through

Question 49

Diastolic blood pressure

Answer 49

Pressure of blood while heart is at rest 80mm Hg

Question 50

Systolic blood pressure

Answer 50

Pressure of blood when ventricles contract 120 mm Hg