Blood Vessels

Question 1

What are the 3 layers of blood vessels?

Answer 1

Tunica intima, Tunica media, Tunica externa

Question 2

Reduces friction between the vessel walls and blood

Answer 2

Tunica Intima

Question 3

Controls vasoconstriction and vasofilation of the vessel

Answer 3

Tunica Media

Question 4

Protects, reinforces, and anchors the vessel to surrounding structures

Answer 4

Tunica Externa

Question 5

Contain large amounts of elastic which enable the vessels to withstand smooth out pressure fluctuations due to heart action

Answer 5

Elastic arteries

Question 6

Deliver blood to specific body organs and have the greatest proportion of tunica mesia of all vessels making them more active in vasoconstriction

Answer 6

Muscular arteries

Question 7

The smallest arteries and regulate blood flow into capillary beds through vasoconstriction and vasodilation

Answer 7

Arterioles

Question 8

Smallest vessels and allow for exchange of substances between the blood and interstitial fluid

Answer 8

Capillaries

Question 9

Most common capillaries and allow passage of fluids and small solutes

Answer 9

Continuous capillaries

Question 10

Capillaries that are more permeable to fluids and solutes that continuous capillaries

Answer 10

Fenestrated capillaries

Question 11

Capillaries that allow large molecles to pass between the blood and surrounding tissues

Answer 11

Sinusoidal capillaries

Question 12

Microcirculatory networks consisting of a vascular shunt and true capillaries, which function as the exchange vessels

Answer 12

Capillary beds

Question 13

Surrounds each capillary at the metarteriole and acts as a valve to regulate blood flow into the capillary

Answer 13

Percapillary Sphincter

Question 14

Difference between diastolic and systolic pressure

Answer 14

Pulse Pressure

Question 15

Cluster of sympathetic neurons in the medulla that controls the changes in the diameter of blood vessels

Answer 15

Vasomotor Center

Question 16

Detect, stretch, and send impulses to the vasomotor center, inhibiting its activity and promoting vasodilation of arterioles and veins

Answer 16

Baroreceptors

Question 17

Detect a rise in carbon dioxide levels of the blood, and stimulate the cardioacceleratory and vasomotor centers

Answer 17

Chemoreceptors

Question 18

Automatic adjustment of blood flow to each tissue in proportion to its needs and is controlled intrinsically by modifying the diameter of local arterioles

Answer 18

Autoregulation

Question 19

Force of fluid against a membrane

Answer 19

Hydrostatic pressure (HP)

Question 20

The force of opposing hydrostatic pressure, is created by the presence of large, nondiffusible molecules that are prevented from moving through the capillary membrane

Answer 20

Colloid osmotic pressure (OP)

Question 21

Any condition in which blood volume is inadequate and cannot circulate normally, resulting in blood flow that cannot meet the needs of a tissue

Answer 21

Circulatory shock

Question 22

Results from a large-scale loss of blood, and may be characterized by an elevated heart rate and intense vasoconstriction

Answer 22

Hypovolemic shock

Question 23

Normal blood volume, but extreme vasodilation, often related to a loss of vasomotor tone, resulting in poor circulation and a rapid drop in blood pressure

Answer 23

Vascular shock

Question 24

Due to prolonged exposure to heat, resulting in vasodilation of cutaneous blood vessels

Answer 24

Transient vascular shock

Question 25

When the heart is too inefficient to sustain normal blood flow and is usually related to myocardial damage

Answer 25

Cardiogenic shock