What are tree rings and how do they form?  Using your knowledge of how trees grow and tree rings form, choose ONE of the following: A) How can tree rings be evaluated to determine the age of wooden artifacts in archeology OR B) How scientists use tree rings to gain information about historical climate. 

There are opportunities for extra credit in this course.

21) In the following diagram, what activity in the cardiac cycle does number 5 indicate?  

18.  In the following diagram, what activity in the cardiac cycle does number 2 indicate?

26) What is the stroke volume for this patient at this moment in time?

39) During of your clinical rotations, you are helping prepare a patient for mobility on the cardiac step-down unit. You place the telemetry leads but are not confident in your recall of the normal orientation. You place them as shown. Image description: Anterior view of a person’s chest with ECG leads placed. Black lead attaches to their left upper chest. White lead attaches to their right upper chest. Brown lead attaches just superior to the xiphoid process. Red lead attaches to the left lower chest. Green lead attaches to the right lower chest.

27. What is this patient’s ejection fraction?

13) A person who has a significant number of left axillary lymph nodes surgically removed is most likely to be at increased risk for what type of complication?

20) In the following diagram, what activity in the cardiac cycle does number 4 indicate?

The following table is data about the velocity and time for an automobile. From this , is the Velocity (m/s)  Time (s)  0 0 3 5 6 10 9 15 12 20