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PGY/BIO 502 Cardiac Muscle. Exam
Questions And Answers 100% Pass
How many chambers does the heart have? - ANS 4 chambers - 2 upper (atrium) and 2 lower
(ventricles)
Blood vessels - ANS arteries and veins
arteries - ANS carry blood away from the heart
veins - ANS carry blood to the heart
Steps of blood being carried to the heart - ANS -superior and inferior vena cava feeding
blood to the RA
-blood is deoxygenated
-blood travels from RA to the LV
-blood goes out the RV into the pulmonary artery
-goes to the lungs where gas exchange occurs (co2 and o2)
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-hemoglobin turns blood red, pulmonary blood brings blood to left atrium
-blood then goes to the LV and then out the aorta and to the systemic circulation
the circulatory system is a - ANS closed system
what comes out of the right heart goes to the - ANS lungs and then back to the left side and
vice versa
right and left heart blood flow is arranged in - ANS series
right ventricular ejected volume must - ANS equal left ventricular ejected volume because it
is a closed system
Is the LV or RV thicker? - ANS LV
there are relative volumes of LV and RV through a - ANS cardiac cycle
What kind of contraction takes place of the myocardium? - ANS synchronous
the left heart pumps blood - ANS from lungs to body
the right heart pumps blood - ANS from body to lungs, respiratory system
the heart contract and relaxes - ANS every couple of seconds on a regular basis everyday
cells excitation and healthy conditions are - ANS synchronous
, ©EVERLY 2025 ALL RIGHTS RESERVED
the heart regulates contractions using - ANS every muscle cell in a chamber, same for
relaxation
the respiratory system doesn't produce much - ANS resistance
The myocardium is a - ANS functional syncytium
Each gap junction protein is called a - ANS connexon
Each connexon makes a - ANS hemi-channel
Gap junctions are arranged into ________ at the end of ___________ - ANS -plaques
-cardiomyocytes
*means that there's low resistance pathways from one cell to another
Voltage-gated Na+ channels are also
localized to - ANS junctional plaques
Na+ channels are good for - ANS rapid electrical conduction
Consequences of the syncytial nature of cardiac muscle: - ANS 1. Heart chamber contracts as
approximated as a single cell - 100s of cells contract at the same time
2. Understanding single cell function understanding heart function
PGY/BIO 502 Cardiac Muscle. Exam
Questions And Answers 100% Pass
How many chambers does the heart have? - ANS 4 chambers - 2 upper (atrium) and 2 lower
(ventricles)
Blood vessels - ANS arteries and veins
arteries - ANS carry blood away from the heart
veins - ANS carry blood to the heart
Steps of blood being carried to the heart - ANS -superior and inferior vena cava feeding
blood to the RA
-blood is deoxygenated
-blood travels from RA to the LV
-blood goes out the RV into the pulmonary artery
-goes to the lungs where gas exchange occurs (co2 and o2)
, ©EVERLY 2025 ALL RIGHTS RESERVED
-hemoglobin turns blood red, pulmonary blood brings blood to left atrium
-blood then goes to the LV and then out the aorta and to the systemic circulation
the circulatory system is a - ANS closed system
what comes out of the right heart goes to the - ANS lungs and then back to the left side and
vice versa
right and left heart blood flow is arranged in - ANS series
right ventricular ejected volume must - ANS equal left ventricular ejected volume because it
is a closed system
Is the LV or RV thicker? - ANS LV
there are relative volumes of LV and RV through a - ANS cardiac cycle
What kind of contraction takes place of the myocardium? - ANS synchronous
the left heart pumps blood - ANS from lungs to body
the right heart pumps blood - ANS from body to lungs, respiratory system
the heart contract and relaxes - ANS every couple of seconds on a regular basis everyday
cells excitation and healthy conditions are - ANS synchronous
, ©EVERLY 2025 ALL RIGHTS RESERVED
the heart regulates contractions using - ANS every muscle cell in a chamber, same for
relaxation
the respiratory system doesn't produce much - ANS resistance
The myocardium is a - ANS functional syncytium
Each gap junction protein is called a - ANS connexon
Each connexon makes a - ANS hemi-channel
Gap junctions are arranged into ________ at the end of ___________ - ANS -plaques
-cardiomyocytes
*means that there's low resistance pathways from one cell to another
Voltage-gated Na+ channels are also
localized to - ANS junctional plaques
Na+ channels are good for - ANS rapid electrical conduction
Consequences of the syncytial nature of cardiac muscle: - ANS 1. Heart chamber contracts as
approximated as a single cell - 100s of cells contract at the same time
2. Understanding single cell function understanding heart function
