Unit 2 Topic 1 Flashcards
What layer of the heart contains adipose tissue?
epicardium
What layer of the heart is thickest?
myocardium
What layer of the heart has fibers and simple squamous epithelium?
endocardium
What are purkinje fibers specialized for?
rapid conduction of action potentials for coordinated ventricular contraction
What are the collection of cardiac myocytes that are found in the subendocardial layer of the heart?
purkinje fibers
What component of the intercalated disk is perpendicular to the myofibrils and provide structural attachment?
Transverse component
Where are fascia adherens found?
boundaries of cells
What is the function of maculae adherens?
bind cells together and reinforce fascia adherens
What component of the intercalated disk are parallel to myofibrils and provide functional attatchment?
lateral component
What component of the intercalated disk includes gap junctions that provide ionic continuity to create a synctium and allow coordniated depolarization?
Lateral
What takes blood away from the heart?
arteries
What type of artery is resistant to large pressure changes and allow stretch and recoil?
elastic
What type of artery dampens oscillations in blood pressures and are the majority of arteries?
muscular
What regulates blood pressure and are highly active in vasoconstriction and vasodilation?
arterioles
What takes blood to the heart?
veins
What operates at a lower pressure: veins or arteries?
veins
What has large, irregular shaped lumen: arteries or veins?
veins
What has no internal elastic lamina in the tunica intima, but a small amount of connective tissue?
veins
Do arteries or veins contain valves?
veins if they are below the heart
What has the smallest diameter: arteries, veins, or capillaries?
capillaries
What is composed of simple squamous epithelium with an underlying basement membrane and is the site of gas/nutrient/waste exchange?
capillaries
What type of capillaries are sealed with zona occuldens at the edges are are found in the CNS, lung, CT, and muscle?
continuous
What is limited in the continuous capillaries?
transport is limited to transcytosis and diffusion
What capillaries are transcellular openings or windows in endothelium?
fenestrated
Where are fenestrated capillaries found?
kindney, endocrine, and intestines
What capillary has large gaps between cells?
sinusoids
What capillary has large gaps for movement of fluid, proteins, or cells to pass easily?
sinusoids
