B The three elements carried ^by blood are red and white ^corpuscles and -----. ^A) Plasma B) Platelets ^A Are nitrogenous wastes ^carried by plasma from the ^liver to the kidney? ^A) Yes B) No ^B What element does hemoglobin ^contain which is essential ^to life? ^A) Magnesium B) Iron ^A One difference between red ^and white blood cells is the ^absence of ----- in RBC's. ^A) Nuclei B) Platelets ^A The exchange of oxygen and ^carbon dioxide occurs in the ^------. ^A) Capillaries B) Venules ^A Nicotine slows digestion and ^constricts blood vessels. ^A) True B) False ^ ^A Emphysema and ----- are common^diseases associated with ^smoking. ^A) Bronchitis B) Bursitis ^B Alcohol is a stimulant that ^speeds up the activity of ^body functions. ^A) True B) False ^A Coffee, tea and cocoa contain ^natural drugs which are ^A) Stimulants B) Depressants ^ ^B When iron in hemoglobin ^combines with oxygen it is ^said to be ^A) Oxidized B) Oxygenated ^
