Histology

Question 1

fenestrated capillary feature ___

eg.s

Answer 1

50nm pores

mucosa, gut, endocrine glands, kidney glomeruli

Question 2

sinusoidal/discontinuous capillaries are found in the __

Answer 2

liver, spleen, bone marrow

Question 3

Layers of endocardium

Answer 3

endothelium (simple squamous)>basal lamina>thin layer collagen>denser connective tissue(in some areas>subendocardium w conducting fibres, vessels and nerves)

Question 4

Intercalated discs are composed of ___

Answer 4

desmosomes
adherent junctions (actin of 1 cell to that of another)
gap junctions

Question 5

Epicardium structure:

Answer 5

single mesothelium (flattened epithelial) layer>basal lamina>fibroelastic connective tissue>adipose
contain coronary arteries superficially

Question 6

Fibrous pericardium is composed of

Answer 6

fibrocollagenous tissue

Question 7

serous pericardium composed of

Answer 7

mesothelium, basal lamina and connective tissue

Question 8

Pacemaker cells histological stand out features

Answer 8

pale, 4-8microm = v small

few myofibrils, little glycogen and no T-tubule system

Question 9

Conducting myocytes are found in ___

Histological features=

Answer 9

subendocardial layer

abundant glycogen, no T tubules/intercalated discs and sparse actin+myosin=pale w pale centre