13. -Choose from the following descriptions the most suitable for atrium A. They
ID: 3513696 • Letter: 1
Question
13. -Choose from the following descriptions the most suitable for atrium A. They are the discharging chambers. Their walls are much more massive than the ata They work at less pressure. They pump blood toward atria B. They are the receiving chambers. Their walls are much more massive than They work at less pressure. They pump blood toward atria. C. They are the receiving chambers. Their walls are less massive than the ventricular walls. They work at less pressure. They receive the blood from the veins. D. The y are the discharging chambers. Their walls are more massive than the atrial walls. They work at high pressure. They pump blood out of the heart to the great vessel. They are the receiving chambers. Their walls are less massive than the ventricle walls. They work at high pressure. They pump blood out of the heart to the great vessel. E. 14.- Say the right approach about the diastole and heart valves: During the diastole the mitral and tricuspid valves remain closed and the aortic and pulmonary A. B. C. D. During the diastole all the valves of the heart remain close semilunar open. During the diastole the mitral and tricuspid valves remain open and the aortic and pulmonary semilunar close During the diastole the mitral and pulmonary valves remain open and the aortic and Tricuspid open E. During the diastole all the valves of the heart remain open. 15. - This artery follows the anterior interventricular sulcus and supplies blood to the interventricular septum and anterior walls of both ventricles: A. Circumflex Artery B. Left Coronary Artery C. Left Anterior Descending Artery D. Right Marginal Artery E. Posterior Interventricular ArteryExplanation / Answer
13. C
The atria are receiving chambers. Their walls are less massive than the ventricular walls (about one third). They work at low pressure. They receive blood from veins. (Right atrium receive deoxygenated blood from the inferior and superior vena cava while the left receive oxyge ated blood from pulmonary veins).
14. B
During diastole the bicuspid and tricuspid valves remains open while the aortic and pulmonary semilunar valves closed. This is because the pressure within the ventricles is less than atrium and the major vessels so due to the back pressure form aorta and pulmonary vessel the semilunar valves gets closed.
15. C
Left anterior descending artery.
It is a branch of left coronary artery.
It supplies the interventricular septum and anterior walls of both vemtricles.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.