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BMS 300 exam 3 with correct answers
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BMS 300 exam 3 with correct answers
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BMS 300 exam 3 with correct answersdiffusion limits - ** VERIFIED ANSWERS **✔✔distance from oxygen or nutrition source
arteries - ** VERIFIED ANSWERS **✔✔lead away from the heart (ox)
veins - ** VERIFIED ANSWERS **✔✔carry blood to the heart (deox); return vessels
capillaries - ** VERIFIED ANSWERS **✔✔where oxygen, carbon dioxide, nutrients and metabolites
are exchanged; cap bed=exchange tubes
fish cardiovascular system: atrium - ** VERIFIED ANSWERS **✔✔recieves blood from the
systematic vasculature; sends deox blood to the gills
fish cardiovascular system: ventrical - ** VERIFIED ANSWERS **✔✔pumps blood to the gill and the
system vascular
fish cardiovascular system: gill structure - ** VERIFIED ANSWERS **✔✔erythrocyte; endothelia
cell; blood vessel
fish cardiovascular system: gill capillaries - ** VERIFIED ANSWERS **✔✔drawn together to form
vesicles that deliver oxygen rich blood to the tissues
order of the mammalian heart - ** VERIFIED ANSWERS **✔✔oxygen poor blood get pumped
through inferior and superior vena cava, then into RA, through tricuspid valve or R. atrioventricular
valve into the RV and out through the pulmonary valve into the pulmonary artery to lungs, from
lungs oxygen rich blood enters the heart through the pulmonary vein into the LA; then goes through
bicuspid valve or L. atrioventricular valve into the LV and out of the heart through the aorta valve
into the aorta to carry oxygen rich blood to tissues
what kind of system is the mammalian heart? - ** VERIFIED ANSWERS **✔✔closed
,endothelia cells - ** VERIFIED ANSWERS **✔✔cells of the pulmonary capillaries; continuous layer
within
pericardium - ** VERIFIED ANSWERS **✔✔coninuous outer layer of mesothelial cells; attached to
body wall; attached to basil lamina
contraction left side - ** VERIFIED ANSWERS **✔✔contraction of the atremyocardium; contraction
of the ventricular myocardium; cant change volume of heart, pressure increases, force generated on
the blood in the ventricle; as ventricle contracts, AV valve shuts and aorta valve open; muscle more
thick than right side; low pressure return from lungs
diastole - ** VERIFIED ANSWERS **✔✔period of ventricular filling (atrial contraction,
isovolumetric ventricular relaxation)
isometric relaxation - ** VERIFIED ANSWERS **✔✔short 30-60 seconds; sarcomeres smaller
cardia output - ** VERIFIED ANSWERS **✔✔4.3 L/min
ejection phase - ** VERIFIED ANSWERS **✔✔blood leaves the ventricle across the aortic valve
afterload - ** VERIFIED ANSWERS **✔✔pressure on the ventricular myocardium after a
contraction begins
For the left ventricle, pressure in the aorta during ventricular ejection determines the afterload.
Afterload ^ mean arterial pressure )
cardiac cycle - ** VERIFIED ANSWERS **✔✔diastole;
artial myocardium contraction;
ventricular myocardium contraction;
period of isometric contraction; afterload;
ejection;
, isovolumetric relaxation
blood supply to the myocardium - ** VERIFIED ANSWERS **✔✔through the coronary arteries->
arterioles-> capillaries (exchange bed) -> coronary sinus -> right atrium; require a capillary bed to
deliver oxygen and nutrients; blood flow to the myocardial capillary beds occurs during distaole
structure of cardiomyocyte - ** VERIFIED ANSWERS **✔✔uninuclear and branched
cardiomyocyte: desmosomes - ** VERIFIED ANSWERS **✔✔desmosomes (mechanically linked);
gap junction ( link by electrical synapse);
cytoplasmic (protein plaque);
cadherons
cardiomyocyte: Dihydropurine receptor - ** VERIFIED ANSWERS **✔✔v-g calcium channel; sense
positive charge and the gate opens; allows calcium in ( calcium induced, causes the RYR to open..
Calcium released)
cardiomyocytes: conductile - ** VERIFIED ANSWERS **✔✔deliver action potentials to the
contractile cardiomyocytes
cardiomyocytes: contractile - ** VERIFIED ANSWERS **✔✔generates forces; contracts; 98% of CMC
in heart; calcium binds to troponin C... calcium induced, calcium released
sinoarticle vessle - ** VERIFIED ANSWERS **✔✔cluster of contractile CMC, pacemaker
sinalatrial node (SA) and atrioventricular node - ** VERIFIED ANSWERS **✔✔collection of
conductile CMC
flow of conductile CMC - ** VERIFIED ANSWERS **✔✔sinoatrial node
AV node
bundle of his
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