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Organ Histo > Chapter 4 > Flashcards

Chapter 4 Flashcards

1
Q

where are purkinje fibers found in the heart?

A

subendocardial ct layer

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2
Q

layers of the heart wall

A

endocardium, myocardium , pericardium

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3
Q

perkinje fibers store this molecule

A

glycogen

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4
Q

in myocardial structure the interclated discs are made of a transverse portion called this____ and are made by these two proteins

A

rise of stairs, macula adherens, fascia adherens

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5
Q

the longitudinal portion of chairs is called this and composed of these proteins

A

step of stairs, large gap junctions

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6
Q

specialized cardiac muscle that are involved in hormone secretion

A

myoendocrine cells

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7
Q

what is the cardiac skeleton composed of?

A

dense irregular ct

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8
Q

what is the function of the septum memrbanceum of the cardiac skeleton?

A

provides an origin and insertion for cardiac myocites

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9
Q

chest pain brought on by exertion stemming from slow progressive narrowing of the coronary vessels therefore less oxygen

A

angina

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10
Q

abnormal heart rythms caued by damage or death occurring ot purkinje fibers and other conducting tissues

A

dysrhythmia

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11
Q

infection in the pericardial cavity therefore inflammation of the serous pericardium (visceral and parietal)

A

pericarditis

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12
Q

tunica intima is a continuation of this in the heart

A

endocardium

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13
Q

tunica media is a continuation of this in the heart

A

myocardium

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14
Q

tunica adventitia is a continuation of htis in the heart

A

epicardium

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15
Q

outer portion of tunica media contains these

A

vasa vasorum

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16
Q

what major luminal wall layer is thickest/most dominant within the elastic arteries?

A

tunica media

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17
Q

what is the tunica media primarily made of in elastic arteries?

A

fenestrated elastic laminae

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18
Q

what is the tunica intima made of in elastic arteries?

A

attenuated endothelium

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19
Q

what is the tunica adventitia made of in elastic arteries?

A

loose fibroelastic ct

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20
Q

which major luminal wall layer is thickest/dominant withing muscular arteries?

A

tunica media

21
Q

what is the tunica media of muscular arteries primarily composed of?

A

smooth muscle

22
Q

what is the general tissue type that makes up the tunica adventitia of arteries?

A

CT

23
Q

which type of artery has the most developed internal elastic lamina

A

muscular artery

24
Q

which is the thinnest of the major luminal wall layers in arteries?

A

Tunica intima

25
Q

hardening of primarily large arteries. Tunica intima becomes infiltrated with soft lipids causing lumen diameter to decreae

A

arteriosclerosis (atherosclerosis)

26
Q

short terminal arteriole branches that lack a true tunica intima

A

metarterioles

27
Q

these function to control lumen size and therefore the amount of blood into the capillaries

A

AVA (arteriovenous anastomsis)

28
Q

cell junctions fumctions in capillaries

A

move marcromolecules and allows cell movement

29
Q

most common capillary type

A

continuous capillaries

30
Q

function of pericytes in continuous capillaries

A

healing and blood flow regulation

31
Q

which structure lacks a true tunica media

A

metarterioles

32
Q

associated with channels called thoroughfares

A

metarterioles

33
Q

structure with thicker tunica media and tunica adventitia

A

AVA

34
Q

structure found in all cappillary beds

A

metarterioles

35
Q

structure that redirects away from capillary beds

A

AVA

36
Q

structure that enhances exchange between blood and tissues

A

sinusoids

37
Q

which cell type with reparitive potential is found exterior to capillaries and venules

A

perioctyes

38
Q

how do veins vary from arteries

A

not as uniform, often larger, and higher number

39
Q

functions of valves in veins

A

prevent backflow and work with skeletal muscle to keep blood moving

40
Q

postcapillary venule layers

A

only has a tunica intima

41
Q

collecting venule layers

A

tunica intima and tunica adventitia, no tunica media

42
Q

muscular venule layers

A

All three are present

43
Q

size of vein where all three levels are present, valves are common, and the tunica adventita is usually the thickest/most dominant

A

medium

44
Q

enlarged and winding superficial veins in the legs stemming from loss of skeletal muscle tone, degradation of vessel wall, and valve incompetence

A

vericose veins

45
Q

varicose veins in lower esaphagus, common in alcoholics, caused by portal hypertension

A

esophageal varices

46
Q

varicose veins at the end of the anal canal

A

hemorrhoids

47
Q

do lymphatic capillaries have pericytes?

A

no

48
Q

do lymphatic capillary endothelial cells join together using tight junctions

A

no

49
Q

do medium and large lymphatic vessels have 3 major luminal wall layers

A

yes

Organ Histo (6 decks)

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