Question

ANA112 SP20 Study Guide Exam 1 bobote AaBbce Abcd AaBb Abbate About Abote Aue Acte A Spacing it Title Store Surph nemo. re About ABC wance Quote 7) Which body activity would be most affected if a patient lacked an adequate number of erythrocytes (anemia)? A) clotting B) immune response C) hormone transport D) oxygen transport 8) Normal heart sounds are caused by which of the following events? A) excitation of the sinoatrial (SA) node" B) closure of the heart valves C) friction of blood against the chamber walls D) opening of the heart valves 9) During the isovolumetric relaxation phase of the cardiac cycle, A) atrioventricular, aortic, and pulmonary valves are closed" B) atrioventricular valves are closed; aortic and pulmonary valves are open C) atrioventricular valves are open; aortic and pulmonary valves are closed D) atrioventricular, aortic, and pulmonary valves are open 10) If a person were to have substantial blood loss, you would expect to see all of the following physiological events to happen EXCEPT one. Select the least likely response to substantial blood loss. A) increasing vasomotor tone B) increases peripheral resistance C) decreased heart rate D) a weak, thread pulse

Answer 1

7. Oxygen transport is most affected if a patient lacked an adequate number of erythrocytes.

The main work of erythrocytes(Red blood cells) is the transport of oxygen between the lungs and body cells, it is done by a protein present in erythrocytes called Hemoglobin.

8. Normal heart sound are caused by the closure of Heart valves.

Normal heart sounds are known as lub and dub.

lub is caused by the closure of the right and left atrioventricular valve.

dub is caused by the closure of the pulmonary and aortic valve.

9. During the isovolumetric relaxation phase of the cardiac cycle, atrioventricular valves are opened and Aortic, pulmonary valves are closed.

The isovolumetric relaxation phase starts when ventricular pressure drops after contraction, This is the beginning of the diastolic phase.

10. If a person were to have substantial blood loss the there is increased vasomotor tone and peripheral resistance due to hypotension and a weak thread pulse due to hypovolemia and hypotension.

Hypotension increases heart rate.

Answer- Decreased Heart rate