98. When activated, a zymogen breaks down

25. True or false. Some cranial nerves are sympathetic.

42. True or false. The nervous system typically has a slower time course than the endocrine system.

107. The collecting duct directly empties into the

31. During low light conditions,

9. Angiotensin-Converting Enzyme is found in the 

63. Because vein walls are primarily _____, the veins can ________.

38. Identify this structure:   

54. The electrocardiogram (ECG) only records

29. Lead in our diet would stimulate which basic taste?