BIO 669 Cardiac Exam Questions and
Answers 100% Solved | Graded A+
The circulatory systems is made of the - ✔✔blood, heart, blood vessels,
lymphatic vessels
heart chambers - ✔✔right atrium and ventricle, left atrium and ventricle
(larger)
heart wall layers - ✔✔epicardium (outer) myocardium (middle muscle)
endocardium (inner)
pumping phases - ✔✔diastole (fill) systole (pump)
action potential SA normal rate - ✔✔60-100
what affects cardiac performance/output? - ✔✔preload, afterload,
contractility
venules - ✔✔smallest veins, receive capillary blood
Venous blood flow - ✔✔venules, into larger and larger veins until it reaches
venae cavae then right atrium
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Vessel walls - ✔✔tunica intima (inner) tunica media (middle) tunica externa
(outer)
blood flow affected by? - ✔✔b/p, restriction or restistance w/in vessels,
viscosity, anatomic defects that cause turbulent or laminar flow,
distensibility of vessels
cardiac output factors - ✔✔resistance and blood volume
where do lymphatic vessels run - ✔✔same sheaths as arteries and veins
lymph drainage direction - ✔✔lymphatic venules in capillary beds,
lymphatic veins of larger and larger sizes, empties into right or left thoracic
duct into right or left subclavian veins
varicosities? - ✔✔areas of veins where blood has pooled, usually
saphenous veins. caused by valve damage
chronic venous insufficiency - ✔✔inadequate blood return over long period
causing ischemic changes in vasculature, skin etc
DVT cause - ✔✔venous stasis (immobility, age, left side HF) spinal cord
injury, vein wall damage (trauma or IV meds) hypercoagulable states
(pregnancy,
oral contraceptives, malignancy, genetic)