In the following PA radiograph of the thorax, the arrow points to:
A) the stomach.
B) the dome of the right hemidiaphragm.
C) the 12th rib.
D) the lower margin of the left lung.
E) the lower margin of the right lung.
Ans: B
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A midcoronal plane runs crosswise through the body at right angles to the sagittal plane, dividing the body into superior and inferior parts.
Answer the following statement true (T) or false (F)
__________ is interruption of breathing resulting in lack of oxygen
Fill in the blank(s) with correct word
In terms of blood flow, why is it important that atrial diastole occurs just as ventricular systole begins?
A. Blood is continually propelled in a forward motion down its pressure gradient. B. The atria need that time to prepare for the next contraction. C. Ventricular systole pulls the remaining 20% of blood volume from the atria. D. Blood would flow too fast otherwise.
The cardiac cycle includes all of the following events EXCEPT
a. the movement of impulse from the SA node to all regions of the heart wall. b. the closing and opening of the heart valves during each heart beat. c. the number of times the heart beats in one minute. d. the changes in pressure gradients in all chambers of the heart. e. the changes in blood volume in all chambers of the heart.