19. The trigone is so named because of the shape of the urinary bladder.

12. High blood pressure triggers granular cells of the juxtaglomerular complex to release renin.

34. Which stomach secretion is necessary to convert pepsinogen into pepsin?

14. Blood pressure in the renal glomerulus is lower than in most parts of the body in order to conserve body water.

15.  Which of the following is NOT a function of the spleen?        

15. The proximal convoluted tubule is the portion of the nephron that attaches to the collecting duct.

35. ____ are inorganic elements in your diet that are required in small amounts for your body to work properly.

34. Which of the following is NOT found in saliva?        

16. Identify the lymph node.

5. In the kidneys, the countercurrent mechanism involves the interaction between the flow of filtrate through the nephron loop of the juxtamedullary nephrons (the countercurrent multiplier) and the flow of blood through the limbs of adjacent blood vessels (the countercurrent exchanger). This relationship establishes and maintains an osmotic gradient extending from the cortex through the medulla’s depths, allowing the kidneys to dramatically varying urine concentration.