1. What is the most abundant type of cell in the human body? A. Neuron B. Epithelial cell C. Red blood cell D. White blood cell E. Vascular smooth muscle cell F. Skeletal muscle cell ANS: C PTS: 1 2. The most abundant substance in the human body and the approximate percentage of that substance in the body is which of the following? A. Protein, 30% B. Protein, 60% C. Water, 30% D. Water, 60% E. Carbohydrate, 30% F. Carbohydrate, 60% ANS: D PTS: 1 3. A large volume of blood is transfused to a person whose baroreceptor blood pressure control system is not functioning. Arterial blood pressure rises from the normal level of 100 to 160 mm Hg. If the same volume of blood is infused into the same person when the baroreceptor system is functioning, and this time the arterial pressure increases from the normal level of 100 mm Hg up to 120 mm Hg, what is the gain of the baroreceptor system? A. –3 B. –2 C. –1 D. 0 E. +1 F. +2 G. +3 ANS: B PTS: 1 4. Which o