7. Cardiac Histology Flashcards

1
Q

What are the two parts of the transverse region of the intercalated disc?

A

Fascia adherens: actin filaments

Desmosomes: intermediate filaments

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2
Q

In what layer are the coronary vessels found?

A

In the epicardial fat

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3
Q

What are lipofuscin granules?

A

Small bodies of materials digested by lysosomal function. They accumulate near the nuclei as a part of aging.

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4
Q

What helps smooth muscle cells contract uniformly?

A

Gap junctions

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5
Q

Where are the T Tubules in the myocardium located?

A

On top of the Z discs

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6
Q

What is released by myoendocrine cells?

What is its function?

A

Atrial natriuretic factor.

Tells the kidney to increase the glomeriolar filtration rate.

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7
Q

What anchors the contractile apparatuses of smooth muscle to the cell wall?

A

Dense bodies

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8
Q

What two structures sit on top of Z discs?

A

T Tubules

Intercalated disks

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9
Q

What do we find in the longitudinal region of the intercalated disc?

A

Gap junctions

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10
Q

What is the epicardium made of?

A

Fibrocollagenous connective tissue with a mesothelium lining.

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11
Q

What are dense bodies made of?

A

Desmin and vimentin

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12
Q

What type of cardiac myocyte lacks T tubules and has less than normal intercalated discs?

A

Cardiac myocytes of the purkinje fibers

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13
Q

What is the special name for the T Tubules of smooth muscle?

A

Caveolae

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14
Q

What is the endocardium made of?

A

Endothelium and a thin layer of loose CT

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