Lab 3: Blood Vessels

Question 1

Blood vessel functions (5)

Answer 1

1. Unidirectional flow of blood to heart
2. Selectively permit exchange of nutrients within tissues
3. Assist the formation of blood clots at sites of injury
4. Regulates Systemic Blood Pressure
5. Regulates body temperature

Question 2

Arteries carry blood _________ from the heart.

Answer 2

away

Question 3

What are arterioles?

Answer 3

branch from arteries

Question 4

What roles do capillaries play in blood vessels?

Answer 4

gas exchange

Question 5

What gives way to veins?

Answer 5

Venules

Question 6

Veins: Carry blood _________ the heart.

Answer 6

toward

Question 7

What are the exception to arteries and veins and the type of blood they move? (oxygenated versus deoxygenated)

Answer 7

Arteries: Coronary Circuit

Veins: Coronary Circuit

Question 8

What do arteries contain that gives them their elasticity?

Answer 8

internal elastic lamina

Question 9

What are the three layers of arteries?

Answer 9

1. Tunica Externa
2. Tunica Media
3. Tunica Intirna

Question 10

What is tunica externa?

Answer 10

connective tissue

Question 11

What is tunica media?

Answer 11

Smooth muscle and elastic tissue

Question 12

What is tunica intima?

Answer 12

epithelial and connective tissue

Question 13

What are the three types of arteries?

Answer 13

1. Elastic Arteries
2. Muscular Arteries
3. Arterioles

Question 14

What are the functions of elastic arteries? (3)

Answer 14

Generate PRESSURE PULSE as they expand and recoil with each beat.

Contain LOTS of elastic fibers.

Elastic recoil helps PROPEL blood.

Question 15

What are the functions of muscular arteries?

Answer 15

ALSO propel blood.

Vessel walls contain SMOOTH MUSCLE, which allows for regulation of blood pressure

Change blood pressure by altering the radius of the lumen!

Circulatory Shock

Question 16

What is circulatory shock?

Answer 16

Widespread dilation of vessels leading to dramatic loss of blood pressure.

Question 17

What are the functions of arterioles?

Answer 17

They branch into capillary beds

They have a very thin tunica externa

Question 18

What are capillaries composed of in terms of cell layers?

Answer 18

Tunica Interna/intima ONLY

Question 19

What are capillaries the site of?

Answer 19

nutrient exchange

Question 20

What are the three types of capillaries?

Answer 20

Continuous
Fenestrated
Sinusoid

Question 21

Describe continuous capillaries.

Answer 21

vessel walls are smooth and continuous.

Question 22

Describe fenestrated capillaries.

Answer 22

vessel walls contain large pores.

Question 23

Describe sinusoid capillaries.

Answer 23

vessel walls have large gaps.

Question 24

Different levels of permeability allow for different solute exchange: you must know one example per type. What are they?

Answer 24

Blood Brain Barrier Continuous

Intestines/Kidneys F

Question 25

Capillaries do not exist in isolation but form networks known as ________________.

Answer 25

capillary beds

Question 26

Capillary beds are supplied by single ____________ and drained by single _____________.

Answer 26

arterioles venules

Question 27

In capillary beds, the ____________________ _________________ is on the arteriole side.

Answer 27

precapillary sphincter

Question 28

Sphincters help tissues take turns using blood flow known as __________________.

Answer 28

vasomotion

Question 29

Venules contain two types of cell layers, what are they?

Answer 29

Tunica externa Tunica Intima

Question 30

Veins are distinct from arteries in several ways:

Answer 30

Larger lumens than arteries More numerous than arteries Very thin walls Use valves and skeletal muscle contraction to move blood

Question 31

Veins have larger lumens than arteries, there they work under _______________ pressures.

Answer 31

very low

Question 32

Veins are more numerous than arteries, which means that blood in veins can be used in case of blood loss, which is also known as _______________________.

Answer 32

venous reserve.

Question 33

Veins participate in _________________________.

Answer 33

thermoregulation

Question 34

What are the two ways that blood is returned to the heart when the heart is not strong enough by itself to push the blood back to itself?

Answer 34

One-way Valves Skeletal Muscle Pump

Question 35

What is palpable pressure waves created by the alternating contraction/relaxing cycle of the beating heart?

Answer 35

Pulse pressure

Question 36

Only __________ exhibit a pulse.

Answer 36

arteries

Question 37

Difference between apical and radial pulse is known as?

Answer 37

Pulse deficit

Question 38

What pulse is taken by auscultating apex of heart with a stethoscope?

Answer 38

Apical pulse

Question 39

What is a blood pressure cuff known as?

Answer 39

Sphygmomanometer

Question 40

What is the pulse deficit in a healthy individual ON QUIZ!!!!

Answer 40

ZERO 0000000

Question 41

What are the blood pressure sounds called? (QUIZZZ)

Answer 41

Korotkoff sounds