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A&P 2 FALL > Ch 20 > Flashcards

Ch 20 Flashcards

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

A

Walls of arteries and veins have 3 layers

21
Q

Chemicals that act as vasodilators

A

Histamine

Nitric oxide

Bradykinin

22
Q

Esophageal veins drain into which two veins ?

A

Left gastric vein

Azygos vein

23
Q

End arteries

A

Common pathway

24
Q

Sinusoids

A

Capillaries

Large gaps in walls

Discontinuous/absent basement membrane

25
Q

Continuous capillaries are found

A

Skin

Muscle

26
Q

ADH

A

Vasopressin

Resistance and BP

27
Q

Hormones help regulate BP

A

Antidiuretic hormone

Aldosterone

Atrial natriuretic peptide

28
Q

Common hepatic artery

A

Supplies the liver, gallbladder, and stomach

29
Q

Viscosity

A

Restistance of fluid to its flow

30
Q

Vasodilation

A

Widening of blood vessel lumen

Relaxation of smooth muscle of tunica media

30
Q

Peripheral resistance factors

A

Blood vessel length

Blood viscosity

Blood vessel radius

31
Q

Thickest layer of wall in arteries

A

Tunica media

32
Q

Vasoconstrictor

A

Stimulates precapillary sphincters

Decreases local blood flow

33
Q

Elastic arteries

A

Largest

34
Q

Filtration

A

Bulk flow of fluid out of blood

35
Q

Reabsorption

A

Bulk flow into blood

36
Q

Hepatic veins

A

Carry blood from lover to inferior vena cava

37
Q

Arteries

A

Covey blood from heart to capillaries

38
Q

Capillaries

A

Microscopic blood vessels

Exchange substances between blood and tissues

39
Q

Veins

A

Drain blood from capillaries

Transport it back into heart

40
Q

Sub endothelial layer composed of

A

Areolar CT

41
Q

Vasa vasorum

A

Small arteries required to supply large vessels

42
Q

Thickest layer in veins

A

Tunica externa

43
Q

Pathway of blood in portal system

A

Artery, capillary bed, portal vein, second capillary bed, vein

44
Q

Net filtration pressure (NFP)

A

Arterial

Bulk flow out of capillary, plasma leaves

Venous

Bulk flow into capillary, plasma enters

45
Q

Lymphatic system

A

Picks up excess fluid

Filters and returns fluid to venous circulation

46
Q

Local blood flow

A

Degree of tissue vascularity

Alternating blood flow

Total blood flow

47
Q

Resistance

A

Amount of friction blood experiences traveling through vessels

Increased resistance decreases total blood flow

Viscosity
Vessel length
Lumen size

48
Q

Chemoreceptors

A

Aortic bodies in arch and charities bodies in EXTERNAL carotids

A&P 2 FALL (5 decks)

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