List the following in the correct order of their occurrence within the ST segment on the ECG: ventricular ejection begins, lub sound, opening of semilunar valves, period of isovolumetric contraction, closing of AV valves, ventricular systole begins
What will be an ideal response?
1 . ventricular systole begins
2 . closing of AV valves
3 . lub sound
4 . best time to measure EDV
5 . opening of semilunar valves
6 . ventricular ejection begins
You might also like to view...
The pubic symphysis and intervertebral discs are composed of which type of connective tissue?
a) Adipose tissue b) Elastic cartilage c) Fibrocartilage d) Dense irregular connective tissue e) Reticular connective tissue
A patient has elevated eosinophils and monocytes but normal levels of neutrophils, basophils, and lymphocytes. Which of the following could be causing those levels?
A) a viral infection B) an acute bacterial infection C) a chronic bacterial infection D) a chronic parasitic infection E) a severe allergic reaction
In a workout your muscle cells produce lactate, yet you maintain a constant blood pH because ________.
A. metabolic bases are produced at the same rate by muscle cells to neutralize the acids B. the respiratory system removes excess H+ from the blood before the pH is lowered C. endothelial cells secrete excess H+ to prevent a decrease in pH D. metabolic acids are neutralized in muscle cells before released into the blood E. the body contains chemicals called buffers that resist changes in pH
A unique aspect of hematopoiesis is that
A) white blood cell production always results in the same proportion of leukocytes. B) lymphocytes never die. C) white blood cell development varies with the specific needs of the body. D) neutrophils direct all development from the lymph nodes.