35. Which is NOT a vessel that brings blood directly into the right atrium?        

22. Hemorrhage with a large loss of blood causes ________.        

25. The receiving chambers of the heart include the ________.        

17. Which of the following is NOT true regarding fenestrated capillaries?        

1. An obstruction in the superior vena cava would decrease the flow of blood from the head and neck to the heart.

41. Which of the following is NOT a step in urine formation?

50. A spike in ____ triggers ovulation in females.

38. The functional unit of the kidney is the 

22. Which molecule’s blood concentration has the least effect on breathing rate?

4. In the process of hemostasis, which step occurs first?