1. Movement of solute molecules from regions of higher to regions of lower concentrations
is called
A. osmosis
B. diffusion
C. active transport
D. permeability

2. A red blood cell will swell or burst when placed in a(n)
A. isotonic solution
B. hypotonic solution
C. hypertonic solution
D. saturated solution

3. Entry of glucose from the blood into tissue cells occurs by
A. active transport
B. facilitated diffusion
C. simple diffusion
D. osmosis

4. The rate of diffusion of molecules passing through the membrane depends upon
A. the magnitude of concentration difference across the membrane
B. the permeability of the membrane to the diffusion substance
C. the surface area of the membrane
D. All of these choices are true

5. Which of the following statements about the membrane potential is TRUE?
A. it is normally equal to zero volts
B. the inside of the membrane is positively charged compared to the
outside
C. it results in part from the presence of fixed anions within the cell
D. it is due in part to the greater permeability of the membrane to Na+ than
to K+