Please I need help ASAP. S-T D Segment Time (s) o 0.2 0.4 0.6 0.8 Interval Figur
ID: 273717 • Letter: P
Question
Please I need help ASAP.
S-T D Segment Time (s) o 0.2 0.4 0.6 0.8 Interval Figure 18.2 using Figure 18.2, match the following 6) 6) Atrial depolarization. 7) Point after which pressure begins to rise in the aorta 8) Ventricular repolarization. 9) Point that represents the "dup" sound made by the heart. 7) 8) 9) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 10) 10) Normal heart sounds are caused by which of the following events? A) closure of the heart valves B) friction of blood against the chamber walls C) opening and closing of the heart valves D) excitation of the SA node 11) Hemorrhage with a large loss of blood causes A) a lowering of blood pressure due to change in cardiac output B) no change in blood pressure but a slower heart rate C) a rise in blood pressure due to change in cardiac output D) no change in blood pressure but a change in respirationExplanation / Answer
6) atrial depolarisation (A)
7) E
8) E
9) D
10) The answer is closure of heart valve.During each cardiac cycle there ae four heart sounds, but in normal heart only the first and second heart sounds are loud enough to be heard through a stethoscope.The first sound is low pitched,soft and relatively long sounding like lub and second sound is dup which is higher pitch and is shorter and sharper.The first sound is associated with the closure of the AV valves,where as the second sound is associated with the closure of semilunar valve.Opening of valve does not produce any sound.
11) The answer is A.Hemorrage refers to the excessive loss of blood which causes low blood pressure.