BMS 300 EXAM 3 QUESTIONS WITH VERIFIED
ACCURATE ANSWERS
Diffusion limits - Answers - distance from oxygen or nutrition source
Arteries - Answers - lead away from the heart (ox)
Veins - Answers - carry blood to the heart (deox); return vessels
Capillaries - Answers - where oxygen, carbon dioxide, nutrients and metabolites are
exchanged; cap bed=exchange tubes
Fish cardiovascular system: atrium - Answers - recieves blood from the systematic
vasculature; sends deox blood to the gills
Fish cardiovascular system: ventrical - Answers - pumps blood to the gill and the
system vascular
Fish cardiovascular system: gill structure - Answers - erythrocyte; endothelia cell; blood
vessel
Fish cardiovascular system: gill capillaries - Answers - drawn together to form vesicles
that deliver oxygen rich blood to the tissues
Order of the mammalian heart - 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? - Answers - closed
Endothelia cells - Answers - cells of the pulmonary capillaries; continuous layer within
Pericardium - Answers - coninuous outer layer of mesothelial cells; attached to body
wall; attached to basil lamina
Contraction left side - 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 - Answers - period of ventricular filling (atrial contraction, isovolumetric
ventricular relaxation)
Isometric relaxation - Answers - short 30-60 seconds; sarcomeres smaller
Cardia output - Answers - 4.3 L/min
Ejection phase - Answers - blood leaves the ventricle across the aortic valve
Afterload - 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 - Answers - diastole;
Artial myocardium contraction;
Ventricular myocardium contraction;
Period of isometric contraction; afterload;
Ejection;
Isovolumetric relaxation
Blood supply to the myocardium - 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 - Answers - uninuclear and branched
Cardiomyocyte: desmosomes - Answers - desmosomes (mechanically linked);
Gap junction ( link by electrical synapse);
Cytoplasmic (protein plaque);
Cadherons
Cardiomyocyte: Dihydropurine receptor - 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 - Answers - deliver action potentials to the contractile
cardiomyocytes
Cardiomyocytes: contractile - Answers - generates forces; contracts; 98% of CMC in
heart; calcium binds to troponin C... Calcium induced, calcium released
Sinoarticle vessle - Answers - cluster of contractile CMC, pacemaker
Sinalatrial node (SA) and atrioventricular node - Answers - collection of conductile CMC
ACCURATE ANSWERS
Diffusion limits - Answers - distance from oxygen or nutrition source
Arteries - Answers - lead away from the heart (ox)
Veins - Answers - carry blood to the heart (deox); return vessels
Capillaries - Answers - where oxygen, carbon dioxide, nutrients and metabolites are
exchanged; cap bed=exchange tubes
Fish cardiovascular system: atrium - Answers - recieves blood from the systematic
vasculature; sends deox blood to the gills
Fish cardiovascular system: ventrical - Answers - pumps blood to the gill and the
system vascular
Fish cardiovascular system: gill structure - Answers - erythrocyte; endothelia cell; blood
vessel
Fish cardiovascular system: gill capillaries - Answers - drawn together to form vesicles
that deliver oxygen rich blood to the tissues
Order of the mammalian heart - 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? - Answers - closed
Endothelia cells - Answers - cells of the pulmonary capillaries; continuous layer within
Pericardium - Answers - coninuous outer layer of mesothelial cells; attached to body
wall; attached to basil lamina
Contraction left side - 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 - Answers - period of ventricular filling (atrial contraction, isovolumetric
ventricular relaxation)
Isometric relaxation - Answers - short 30-60 seconds; sarcomeres smaller
Cardia output - Answers - 4.3 L/min
Ejection phase - Answers - blood leaves the ventricle across the aortic valve
Afterload - 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 - Answers - diastole;
Artial myocardium contraction;
Ventricular myocardium contraction;
Period of isometric contraction; afterload;
Ejection;
Isovolumetric relaxation
Blood supply to the myocardium - 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 - Answers - uninuclear and branched
Cardiomyocyte: desmosomes - Answers - desmosomes (mechanically linked);
Gap junction ( link by electrical synapse);
Cytoplasmic (protein plaque);
Cadherons
Cardiomyocyte: Dihydropurine receptor - 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 - Answers - deliver action potentials to the contractile
cardiomyocytes
Cardiomyocytes: contractile - Answers - generates forces; contracts; 98% of CMC in
heart; calcium binds to troponin C... Calcium induced, calcium released
Sinoarticle vessle - Answers - cluster of contractile CMC, pacemaker
Sinalatrial node (SA) and atrioventricular node - Answers - collection of conductile CMC
