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Exam 1: BIOS 255 / BIOS255 (Latest Update
2026) Questions with Answers | Grade A | 100% Correct
- Chamberlain
1. Blood Flow: Vena Cava, Right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve, lungs, pul-
monary veins, left atrium, bicuspid valve/mitral valve, left ventricle, aortic semilunar valve, aorta
2. Which components are found in the plasma of blood?: albumin
sodium
water
3. What is the primary function of the coronary sinus?: To drain deoxygenated blood from
the myocardium.
4. What is a role of calcium?: A crucial role in blood clotting by activating platelets
5. Extra cellular fluid: plasma 55%
butty coat 1%
Red blood cells 45%
6. visceral pericardium: The serous membrane lining the surface of the heart.
7. The electrical conduction in the heart in order:: SA node, AV node, Bundle of His, Purkinje
fibers
8. Prevents back flow of blood from the right ventricle into the right atrium: The
tricuspid valve
9. characteristics of cardiac muscle: striated, involuntary control, multinucleated cells
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,https://www.stuvia.com/user/Edufiles
10. Responsible for delivering oxygenated blood to cells of the myocardial layer
of the heart: coronary arteries
11. The amount of blood ejected from the ventricle upon contraction.: stroke volume
12. EKG: electrocardiogram
13. P wave: atrial depolarization
14. Carries sympathetic signals to increase heart rate and contractility.: Vagus Nerve
(CN X)
15. Contains the thickest myocardium: left ventricle
16. Receives deoxygenated blood from the pulmonary veins: left ventricle
17. The structure responsible for initiating each heartbeat and determining the
heart rate is: sinotrial node/ SA Node
18. semilunar valves: pulmonary and aortic valves located between the right ventricle and the pulmonary artery
and between the left ventricle and the aorta
19. interventricular septum: partition between the right and left ventricles
20. A measure of the percentage of whole blood occupied by RBC's: Hematocrit
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Exam 1: BIOS 255 / BIOS255 (Latest Update
2026) Questions with Answers | Grade A | 100% Correct
- Chamberlain
1. Blood Flow: Vena Cava, Right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve, lungs, pul-
monary veins, left atrium, bicuspid valve/mitral valve, left ventricle, aortic semilunar valve, aorta
2. Which components are found in the plasma of blood?: albumin
sodium
water
3. What is the primary function of the coronary sinus?: To drain deoxygenated blood from
the myocardium.
4. What is a role of calcium?: A crucial role in blood clotting by activating platelets
5. Extra cellular fluid: plasma 55%
butty coat 1%
Red blood cells 45%
6. visceral pericardium: The serous membrane lining the surface of the heart.
7. The electrical conduction in the heart in order:: SA node, AV node, Bundle of His, Purkinje
fibers
8. Prevents back flow of blood from the right ventricle into the right atrium: The
tricuspid valve
9. characteristics of cardiac muscle: striated, involuntary control, multinucleated cells
https://www.stuvia.com/user/Edufiles 1/5
,https://www.stuvia.com/user/Edufiles
10. Responsible for delivering oxygenated blood to cells of the myocardial layer
of the heart: coronary arteries
11. The amount of blood ejected from the ventricle upon contraction.: stroke volume
12. EKG: electrocardiogram
13. P wave: atrial depolarization
14. Carries sympathetic signals to increase heart rate and contractility.: Vagus Nerve
(CN X)
15. Contains the thickest myocardium: left ventricle
16. Receives deoxygenated blood from the pulmonary veins: left ventricle
17. The structure responsible for initiating each heartbeat and determining the
heart rate is: sinotrial node/ SA Node
18. semilunar valves: pulmonary and aortic valves located between the right ventricle and the pulmonary artery
and between the left ventricle and the aorta
19. interventricular septum: partition between the right and left ventricles
20. A measure of the percentage of whole blood occupied by RBC's: Hematocrit
https://www.stuvia.com/user/Edufiles 2/5
