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A&P 2 FALL > Ch 20 > Flashcards

Ch 20 Flashcards

(49 cards)

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1
Q

The three unpaired arteries emerging from the descending abdominal aorta

Supply the gastrointestinal tract

A

Superior mesenteric artery

Celiac trunk

Inferior mesenteric artery

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2
Q

Baroreceptors

A

Specialized nerve endings INTERNAL

Respond to stretch in blood vessel walls

Sudden, short term changes in BP

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3
Q

Descending abdominal aorta

A

Supplies branches to supply the abdominal wall and organs

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4
Q

arterioles

A

Smallest arteries

Less than 6 layers of smooth muscle in tunica media

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5
Q

Pulmonary circulation

A

Carbon dioxide removed from blood

Enters alveoli of the lungs

Oxygen exits the alveoli and enters the blood

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6
Q

Tunics

A

Walls of arteries and veins

3 layers

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7
Q

Capillaries

A

Smallest blood vessels

Connect arterioles to venules

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8
Q

External iliac artery

A

Provides main blood supply to the lower limb

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9
Q

Two main Baroreceptors

A

Aortic arch

Carotid sinuses

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10
Q

Capillary bed components

A

True capillaries

Metarteriole

Thoroughfare channel

Post capillary venule

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11
Q

Sinusoids in body

A

Spleen

Bone marrow

Liver

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12
Q

Vasomotion

A

Precapillary sphincters open when a tissue needs nutrients

Pre capillary sphincters close when the tissue needs are met

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13
Q

Hepatic portal system

A

Drains GI tract

Shunts blood to liver

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14
Q

Venules

A

Companion vessels to the arterioles

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15
Q

Sphygmomanometer

A

Measures BP

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16
Q

Brachial artery

A

Compressed by the sphygmomanometer when taking BP

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17
Q

Splenic artery contains

A

Stomach

Pancreas

Spleen

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18
Q

Carotid sinuses

A

Head

Neck

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19
Q

Elastic arteries

A

Subclavian artery

Common carotid artery

Aorta

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20
Q

Tunics

Study These Flashcards
A

Walls of arteries and veins have 3 layers

21
Q

Chemicals that act as vasodilators

Study These Flashcards
A

Histamine

Nitric oxide

Bradykinin

22
Q

Esophageal veins drain into which two veins ?

Study These Flashcards
A

Left gastric vein

Azygos vein

23
Q

End arteries

Study These Flashcards
A

Common pathway

24
Q

Sinusoids

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A

Capillaries

Large gaps in walls

Discontinuous/absent basement membrane

25
Continuous capillaries are found
Skin Muscle
26
ADH
Vasopressin Resistance and BP
27
Hormones help regulate BP
Antidiuretic hormone Aldosterone Atrial natriuretic peptide
28
Common hepatic artery
Supplies the liver, gallbladder, and stomach
29
Viscosity
Restistance of fluid to its flow
30
Vasodilation
Widening of blood vessel lumen Relaxation of smooth muscle of tunica media
30
Peripheral resistance factors
Blood vessel length Blood viscosity Blood vessel radius
31
Thickest layer of wall in arteries
Tunica media
32
Vasoconstrictor
Stimulates precapillary sphincters Decreases local blood flow
33
Elastic arteries
Largest
34
Filtration
Bulk flow of fluid out of blood
35
Reabsorption
Bulk flow into blood
36
Hepatic veins
Carry blood from lover to inferior vena cava
37
Arteries
Covey blood from heart to capillaries
38
Capillaries
Microscopic blood vessels Exchange substances between blood and tissues
39
Veins
Drain blood from capillaries Transport it back into heart
40
Sub endothelial layer composed of
Areolar CT
41
Vasa vasorum
Small arteries required to supply large vessels
42
Thickest layer in veins
Tunica externa
43
Pathway of blood in portal system
Artery, capillary bed, portal vein, second capillary bed, vein
44
Net filtration pressure (NFP)
Arterial Bulk flow out of capillary, plasma leaves Venous Bulk flow into capillary, plasma enters
45
Lymphatic system
Picks up excess fluid Filters and returns fluid to venous circulation
46
Local blood flow
Degree of tissue vascularity Alternating blood flow Total blood flow
47
Resistance
Amount of friction blood experiences traveling through vessels Increased resistance decreases total blood flow Viscosity Vessel length Lumen size
48
Chemoreceptors
Aortic bodies in arch and charities bodies in EXTERNAL carotids

A&P 2 FALL (5 decks)

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