Blood vessels

Question 1

What way do arteries carry blood?

Answer 1

Away from the heart Pulmonary truck to lungs Aorta to everything else

Question 2

What is mircocirculation?

Answer 2

Where exchange occurs

Question 3

What do the arterioles feed?

Answer 3

Capillaries

Question 4

What do capillaries exchange with?

Answer 4

Tissue

Question 5

What receives blood from the capillaries?

Answer 5

Venules

Question 6

What do veins do?

Answer 6

Bring blood back to the heart

Question 7

What is the tunica interna continuous with?

Answer 7

Endothelium

Question 8

What is the tunica media made of and why?

Answer 8

Smooth muscle Critical in the control of blood pressure

Question 9

What does the tunica externa contain?

Answer 9

Vasa vasorum nerve fibres Lymphatics Elastin fibres

Question 10

Why do the elastic arteries have a large lumen?

Answer 10

Allow low-resistance conduction of blood

Question 11

Why do all three tunics contain elastin?

Answer 11

Withstand and smooth out large blood pressure fluctuations

Question 12

Where are muscular arteries in relation to elastic arteries?

Answer 12

Distal

Question 13

What do muscular arteries do?

Answer 13

Deliver blood to body organs

Question 14

Describe muscular arteries

Answer 14

Thick tunica media with smooth muscle

Question 15

When are muscular arteries active?

Answer 15

During vasoconstriction

Question 16

Where do arterioles lead?

Answer 16

To capillary beds

Question 17

Describe the shape and function of arterioles

Answer 17

Smallest arteries Control flow into the capillary beds

Question 18

How does the arterioles control blood flow?

Answer 18

Via vasodilation and constriction.

Question 19

What occurs in the blood vessels?

Answer 19

exchange between blood and cells takes place

Question 20

How are blood vessels organised?

Answer 20

Into interconnected capillary beds.

Question 21

Why does the blood vessels contain pre-capillary sphincters and what are they?

Answer 21

Controls the blood into the capillary bed They are bands of smooth muscle

Question 22

Describe capillaries

Answer 22

Smallest blood vessels Consisting of a thin tunica interna, one cell thick

Question 23

How many RBC can pass through the capillaries a time?

Answer 23

One RBC at a time

Question 24

What is on the outer surface of the capillaries and why?

Answer 24

Pericytes, to stabilize their wall

Question 25

What are the three structural types of capillaries?

Answer 25

Continuous Fenestrated Sinusoids

Question 26

Describe continuous capillaries

Answer 26

They are an uninterrupted lining

Question 27

Where are continuous capillaries abundant?

Answer 27

In the skin and muscle

Question 28

What do intercellular clefts (gap in the capillary) allow?

Answer 28

The passage of fluids

Question 29

In the continuous capillaries of the brain, what junctions are completely around the endothelium?

Answer 29

Tight

Question 30

What constitute the blood-brain barrier?

Answer 30

Continuous capillaries of the brain.

Question 31

Where are fenestrated capillaries found?

Answer 31

Small intestines Endocrine glands Kidneys

Question 32

What do fenestrated capillaries involved in?

Answer 32

Active capillary transport Filtrate formation occurs

Question 33

What are fenestrated capillaries characterized by?

Answer 33

An endothelium riddles with pores Greater permeability than other capillaries

Question 34

Where are sinusoid capillaries found?

Answer 34

Liver Bone marrow Lymphoid tissue Some endocrine tissue

Question 35

What do sinusoid tissues allow?

Answer 35

They allow large molecules to pass between blood and surrounding tissue

Question 36

When are venules formed?

Answer 36

When capillary beds unite

Question 37

Why are venules formed?

Answer 37

Allow fluids and WBCs to pass from the bloodstream to tissue

Question 38

What are the smallest venules in the body?

Answer 38

Postcapillary venules

Question 39

What are postcapillary venules composed of?

Answer 39

Endothelium and a few particles

Question 40

How many layers of smooth muscle do large venules have?

Answer 40

one or two

Question 41

How are veins formed?

Answer 41

When venules converge

Question 42

What are veins composed of?

Answer 42

Three tinucs A thin tunica media (less smooth muscle) Thick tunica externa

Question 43

In veins what does the thick tunica externa consist of?

Answer 43

Collagen fibers and elastic networks

Question 44

Where is 65% of the blood supply stored?

Answer 44

Capacitance vessels

Question 45

Name the type of artery

Answer 45

Elastic artery

Question 46

Name the type of artery

Answer 46

Muscular artery

Question 47

Name the type of artery

Answer 47

Arteriole

Question 48

Name the type of vein

Answer 48

Venule

Question 49

Name the type of vein

Answer 49

Medium sized vein

Question 50

Name the type of vein

Answer 50

Large vein

Question 51

What is the blood vessel between arteries and veins?

Answer 51

Capillaries

Question 52

Label the diagram

Answer 52

1. Tunica externa 2. External elastic lamina 3. Smooth muscle of tunica media 4. Internal elastic lamina 5. Tunica interna = endothelium

Question 53

Label the diagram

Answer 53

1. Collateral arteries 2. Arteriole 3. Capillaries 4. Vein 5. Venule 6. Small venule 7. Precapillary sphincters

Question 54

Label the diagram

Answer 54

1. Small artery 2. Arteriole 3. Capillary beds

Question 55

Name the type of capillary

Answer 55

Continuous

Question 56

Name the type of capillary

Answer 56

Fenstrated

Question 57

Name the type of capillary

Answer 57

Sinusoids

Question 58

Label the vein

Answer 58

1. Endothelium 2. Basement membrane 3. Smooth muscle 4. Tunica externa 5. Lumen 6. Valve