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1 Name: Page 1 1) Which one of the following situations indicates a serious organ system malfunction? A) Mitochondria stop functioning in a unicellular organism exposed to pollutants. B) White blood cells release enzymes in response to the proteins on inhaled pollen. C) The ovary releases estrogen, which quickly binds to cell receptors. D) Blood flow throughout the entire body is suddenly reduced. 4) The diagram below represents a beaker containing a solution of various molecules involved in digestion. 2) The main function of the human digestive system is to A) process organic molecules so they can enter cells B) change amino acids into proteins and carbohydrates C) rid the body of cellular waste materials D) break down glucose in order to release energy 3) Which two systems are most directly involved in providing molecules needed for the synthesis of fats in human cells? A) immune and muscular B) digestive and circulatory C) excretory and digestive D) reproductive and circulatory Which structures represent products of digestion? A) A and D C) B and E B) B and C D) D and E 5) The pancreas is an organ connected to the digestive tract of humans by a duct (tube) through which digestive enzymes flow. These enzymes are important to the digestive system because they A) change food substances into molecules that can pass into the bloodstream and cells B) form the acids that break down food C) change food materials into wastes that can be passed out of the body D) form proteins needed in the stomach 6) The diagram below represents events involved as energy is ultimately released from food. Which row in the table below best represents the chain of Xs and letters A and B in the diagram? A) 1 B) 2 C) 3 D) 4

2 7) Which sequence represents the correct order of events for the production of necessary complex molecules after food is taken in by a multicellular animal? A) synthesis digestion absorption diffusion circulation B) digestion absorption circulation diffusion synthesis C) diffusion synthesis absorption digestion circulation D) circulation diffusion synthesis absorption digestion Page 2 10) An investigation was set up to study the movement of water through a membrane. The results are shown in the diagram below. 8) The interaction of which two systems provides the molecules needed for the metabolic activity that takes place at ribosomes? A) reproductive and excretory B) immune and nervous C) digestive and circulatory D) respiratory and muscular 9) Which body system is correctly paired with its function? A) excretory produces antibodies to fight diseasecausing organisms B) circulatory transports materials for energy release in body cells C) respiratory collects waste material for digestion D) digestive produces hormones for storage and insulation Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a water solution in which the salt concentration is much higher than the salt concentration in the red blood cells? A) The red blood cells will absorb water and increase in size. B) The red blood cells will first absorb water, then lose water and maintain their normal size. C) The red blood cells will first lose water, then absorb water, and finally double in size. D) The red blood cells will lose water and decrease in size.

3 11) A model cell setup is represented in the "Initial State" diagram below. Questions 12 and 13 refer to the following: Page 3 12) After two hours, the color of the liquid in the beaker shown did not change. This shows that Which one of the following diagrams indicates the areas where each of these substances would be located after 20 minutes? A) A) glucose moved from the artificial cell into the beaker B) starch was digested to glucose in the artificial cell C) starch did not pass out of the artificial cell D) glucose molecules combined to produce starch in the artificial cell 13) The laboratory setup shown would most likely be used to demonstrate A) diffusion B) carbohydrate synthesis C) dehydration D) active transport B) C) D)

4 Questions 14 through 16 refer to the following: Page 4 A student prepared four different red blood cell suspensions, as shown in the chart below. 14) Which suspension in the given chart would contain red blood cells that would appear wrinkled and reduced in volume? 19) The diagram below represents a laboratory setup used by a student during an investigation of diffusion. A) A B) B C) C D) D 15) Change in red blood cell volume is principally due to the movement of A) water B) salt C) oxygen D) serum 16) Which process is most likely involved in the change in red blood cell volume shown in the table? A) replication C) active transport B) evaporation D) diffusion 17) A red onion cell has undergone a change, as represented in the diagram below. This change is most likely due to the cell being placed in A) light C) darkness B) salt water D) distilled water Which statement best explains why the liquid in tube A will rise over a period of time? A) The fluids in both tubes A and B will change from a higher temperature to a lower temperature. B) Water and starch volumes are the same in both tubes A and B. C) The water will pass from a region of lower starch concentration to one of higher starch concentration. D) The starch concentrations are equal on both sides of the membrane. 18) The diagram below represents one metabolic activity of a human. Letters A and B are best represented by which row in the chart? A) Row 1 B) Row 2 C) Row 3 D) Row 4

5 Page 5 20) Which lettered part on the given microscope image should be used to focus the image while using high power?

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