22. Which tissue type is capable of information flow and or A. muscle B. connective C. nervous D. epithelial E. fat processing 23. In humans, most of the chemical digestion of food takes place in the A esophagus B. stomach C. large intestine D. small intestine E. mouth 24. Within th circulatory system, exchange happens through the walls of A. all blood vessels B. veins only C. capillaries only D. arteries only 25. The “dupp” heart sound occurs A. when the ventricles contract. B. when the ventricles relax. 26. Hemoglobin is A. a protein found in the plasma. B. a digestive enzyme C. a protein produced by and found in human red blood cells. D. a protein produced by and found in human white blood cells E. a protein produced by platelets as they help clot the blood. 27. Which type of muscle is voluntary? A. Smooth B. Skeletal C. Cardiac D. Both skeletal and cardiac E. Both smooth and cardiac 8. Chemical digestion begins in the A. mouth B. esophagus C. stomach D. liver E. small intestine