1. How do molecules naturally move when a concentration gradient is present? a. From an area of high concentration to an area of low concentration
b. From an area of low concentration to an area of high concentration
c. The molecules do not move to any specific concentration
d. The molecules will move between both high and low concentrations equally
2. When a vesicle fuses with the cell membrane and releases cell waste to the outside of the cell, this process is called?
a. endocytosis
b. phagocytosis
c. pinocytosis
d. exocytosis
3. The movement of water molecules across a selectively permeable membrane like below is known as? "Goes with the image of the beaker"
a. Exocytosis
b. Phagocytosis
c. Osmosis
d. Endocytosis
4. Which of the following statements is FALSE regarding the isotonic solution demonstrated in the image below? "goes with the image of the blood cell"
a. water will move equally in both directions
b. the cell will stay the same size
c. the cell will shrivel
d. it has equal water and solute concentrations
5. Based on the diagram below, in which direction will water move and why?
"goes with the image of the water column"
a. There is more water than solute on side I, so water will move towards side II.
b. There is more water than solute on side II, so water will move towards side I.
c. Water will move equally back and forth because the solutes on sides I and II are equal.
d. There is an equal amount of water on both sides so water will not move.

Medical researchers have a particular interest in mice because the mouse carries almost the same set of genes as humans. Of the organs studied, which organ in a mouse has the LEAST mitochondria in its cells? "goes with the graph"
a. Heart, left ventricle
b. Heart, left atrium
c. Liver
d. Pituitary gland