SIreviewquestions Flashcards
great cardiac vein drains blood from the heart muscle to
right atrium
autonomic cneters for cardiac function are located in the …
cardiac centers of the medulla oblongata
serous membrane covering the inner surface of the heart is the
endocardium
simple squamous epithelium covering the valves of teh heart constitutes the
endocardium
during diastole a chamber of the heart will
relax and fill with blood
during the cardiac cycle, amount of blood ejected from the left ventricle when the semilunar valve opens is the
stroke volume
true or false: the refractory period of a cardiac muscle is longer than skeletal muscle
true
cardiac output cannot increase indef bc
the available filling time becomes shorter as the heart rate increases
thickest layer of the heart wall is the
myocardium
freshly oxygenated blood is first received by
left atrium
atrial depoliarization coincides with what wave
P wave
what depolarizes next after the AV node>
bundle branches
SA node, AV node, AV bundle, R&L bundle branches, purkinje fibers
electrical impulse pathway thru conducting system of heart
3 factors regulating stroke volume to ensure that the left and right ventricles pump equal vlumes of blood
1) preload, the stretch on the heart before it contracts
2) contractility, the forcefulness of contraction of individual ventricular muscle fibers
3) afterload, the pressure that must be exceeded before blood can be ejected from the ventricles
plasma accounts for 55% of the volume of hole blood and water accounts for __% of plasma volume
92
vascular spasm platelet phase coagulation retraction fibrinolysis
sequence of hemostasis
stem cells responsible for lymphopoiesis located in
thymus, spleen, lymph nodes, red bone marrow,
calcium and vitamin k affect almost every aspect of the ___ process
clotting
waste product bilirubin is formed from __
heme
rely on anaerobic respiration, large part of their volume is hemoglobin, and shape increases membrance surface area
erythrocytes
serious bacterial infection leads to more of these cells in the blood
neutrophilis
reduce blood flow to the kidneys lead to increased__
erythropoiesis
blood cells that attack a specific antigen is a
lymphocyte
leukocyte that releases histamine and other inflammatory chemicals is the
basophil
leukocytes share diapedesis, disease fights, and more active in connective tissues than in blood but not
distorted lobed nuclei
difference between thrombus and an embolus
thrombus must travel to become an embolus
plasma component that forms fibrous skeleton of a clot consists of
firbinogen
blood vessels that play most important role in regulating blood pressure and blood flow to a tissue are the
arterioles
baroreceptors that function in the reg of bp are located in the
carotid sinus
2 way exchange of substances btwn blood and body cells occurs only thru ___
capillaries
large molecules such as peptides and proteins move into and out of the bloodstream by way of __ __
fenestrated capillaries
local control of blood flow due to the action of precapillary sphincters is
autoregulation
blood is transported thru the venous system by means of …
muscular contractions and the respiratory pump
net hydrostatic pressure forces water OUT OF a capillary; net osmotic pressure forces water ___ capillary
into
2 arteries formed by the division of the brachiocephalic trunk are
common carotid and subclavian
unpaired arteries supplying blood to the visceral organs include
the celiac and superior and inferior mesenteric arteries
paired arteries supplying blood to the body walla ndother structures outside the abdominopelvic cavity include the
iliac , femoral, and lumbar arteries
the vein that collects most of the venous blood from below the diaphragm is the
inferior vena cava
tunica intima includes
simple squamous epithelium, loose connective tissue, smooth muscle
inferior vena cava can function as a blood __
reservoir
increase in capillary hydrostatic ressure results in incrased ___ from capillaries to the interstitial space
filtration
which layer of artery wall thickens most in atherosclerosis
tunica intima
which vessels is bilaterally symmetrical of the pair occurs on each side of the body
internal carotid artery
drainage of superficial venous blood from the leg we find that blood enters the great saphenous vein, femoral vein, inferior vena cava, and right atrium but whats missing is
external and common iliacs
