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Transcript
Unit Test Homeostasis-DO NOT WRITE ON THE EXAM. RECORD ALL ANSWERS ON YOUR ANSWER SHEET. 1. If a cell is placed in salt water, water will leave the cell by: A. Diffusion B. Concentration gradient C. Osmosis D. Active Transport 2. Which of these is an example of homeostasis in a multicellular organism? A. Inheriting a gene B. Growing larger and stronger C. Drinking an excessive amount of sugar water D. Regulating body temperature 6. A cell which normally lives in a 10% saltwater solution was moved into another solution. Which of these solutions would cause the cell to increase in size at the greatest rate? A. 0% saltwater solution B. 5% saltwater solution C. 10% saltwater solution D. 20% saltwater solution 7. Diffusion can be defined as particles moving: A. from left to right. B. from right to left. C. from an area of high concentration to an area of low concentration. D. from an area of low concentration to an area of high concentration. Examine the following diagram of the cell membrane: 8. The tendency of organisms to maintain a stable internal environment is called A. Cellular Organization B. Homeostasis C. Active Transport D. Metabolism 3. What kind of a molecule is Structure A? A. Homogenate B. Phospholipid C. Protein D. Organelle 4. Which of these body systems is responsible for the removal of metabolic wastes from the blood? A. Respiratory B. Circulatory C. Urinary (Excretory) D. Digestive 5. A particular toxin prevents cellular production of usable energy. Cells that are affected by this toxin are unable to carry out many of their normal functions. Which of these organelles would be most directly harmed by this toxin? A. Ribosomes B. The Nucleus C. Mitochondria D. The Vacuole Examine the following diagram of the cell membrane: 9. Of the parts labeled above, which part of the cell membrane is hydrophobic? A. Part 1 B. Part 2 C. Structure B D. Outside the Cell Unit Test Homeostasis-DO NOT WRITE ON THE EXAM. RECORD ALL ANSWERS ON YOUR ANSWER SHEET. 10. A student observes a unicellular organism under a microscope. After a while, the organism begins to split into two cells, as shown in the diagram. Which of these structures does the organism shown above use to move itself? A. Cilia B. Ribosomes C. Flagella D. Pseudopodia 11. Which part of the cell is responsible for capturing sunlight and making food for the cell? A. Golgi Apparatus B. Chloroplasts C. Mitochondria D. Cytoplasm 12. Spartina, a cord grass, grows in salt marshes and stores salt in its roots. This makes the salt concentration in its roots greater than that of the surrounding water. What most likely occurs in response to this salt concentration in the roots? A. Salt moves into the roots B. Water moves into the roots C. Nutrients move out of the roots D. Water moves out of the leaves into the air 13. The difference between active and passive transport involves: A. the level of activity of one over the other. B. the use of energy of one over the other. C. the direction of transport of one over the other. D. the rate of transport of one over the other. 14. Nutrients taken in by the body are broken down during cell processes. Some products of these cell processes can be harmful if not removed from the body. Describe how harmful waste products are removed from the body. In your response, be sure to: identify the parts of a cell that are involved in waste removal identify the body systems involved in the removal of waste products explain how the body systems work together to remove waste from the body Write your response to Question 14 on the back of your answer document. 15. The exchange of oxygen and carbon dioxide between the body and the air occurs in the lungs. This exchange of gases takes place at the cellular level. What part of the cell is primarily responsible for this exchange? A. The Cell Membrane B. The Nucleus C. The Cell Wall D. The Ribosome 16. Euglena uses which of these to move? A. B. C. D. Cilia Vacuole Flagella Pseudopodia Unit Test Homeostasis-DO NOT WRITE ON THE EXAM. RECORD ALL ANSWERS ON YOUR ANSWER SHEET. 17. Which of these organelles use oxygen to produce energy for the cell? A. Nuclei B. Ribosomes C. Endoplasmic Reticulum D. Mitochondria 18. A student designed an experiment to see if plants grow better when watered with a sugar solution. He divided the plants into six groups, measured the initial height of each plant, and calculated the average height for each group. Once a week for two months, he watered the plants in each group using a different sugar solution for each plant group. At the end of two months, he measured the final height of each plant and calculated the average height for each group. The student’s data are shown in the table below. 19. A cell moves particles from a region of low concentration to a region of high concentration by: A. active transport. B. osmosis. C. passive transport. D. diffusion. 20. The structure most responsible for maintaining cell homeostasis is the: A. Cytoplasm B. Cell Wall C. Cell Membrane D. Mitochondria 21. Which cell structure contains molecules that direct cell activities? A. Nucleus B. Ribosome C. Mitochondrion D. Chloroplast 22. A student observed different types of cells under a microscope. Four of the cells he observed are shown below: Which of these statements explains why the plants in Groups E and F died? A. The high sugar content caused too much water to move out of the root cells. B. The high sugar content caused too much water to move into the root cells C. The high sugar content prevented the plant from capturing energy. D. The high sugar content clogged the pores in the cell membrane Cell 3 is an example of a(n): A. Prokaryotic Cell B. Animal Cell C. Plant Cell D. Fungi Cell Unit Test Homeostasis-DO NOT WRITE ON THE EXAM. RECORD ALL ANSWERS ON YOUR ANSWER SHEET. 23. A student is setting up an experiment using a type of bag that is permeable to water, but not to sugar. She will fill and weigh three bags and place each bag into a different beaker. The diagram below shows the contents of the bags and the beakers at the start of the experiment. If the beakers are left alone, which of the bags will increase in size after 24 hours? A. The bag in Beaker 1 B. The bag in Beaker 2 C. The bag in Beaker 3 D. The bags in Beakers 1 & 3 24. If I place a potato in a solution and the next day the mass of the potato decreased, it was placed in a(n) ___________________ solution A. Hypotonic B. Hypertonic C. Isotonic D. Cannot be determined from the information given. 25. The respiratory system brings oxygen into the body from the environment. Which of these body systems is directly involved in the delivery of oxygen to the major organs of the human body? A. The Nervous System B. The Digestive System C. The Excretory System D. The Circulatory System 26. Keratin is a protein found in hair. Where in a cell is keratin made? A. The nucleus B. The vacuole C. The ribosomes D. The mitochondria 27. Which of these structures are found in plant cells but not in animal cells? A. B. C. D. A cell membrane Chloroplasts Endoplasmic Reticulum Mitochondria Use the following diagram and information to answer questions 28 and 29 below: 28. Starch turns blue-black in the presence of iodine solution. A selectively permeable dialysis sac containing a starch solution is placed into a beaker of iodine solution. If the dialysis sac is permeable only to water and iodine, what will the solutions in the beaker and the sac look like after two hours? A. The iodine solution in the beaker will turn blue-black; the starch solution will not change. B. The starch solution in the dialysis sac will turn blue-black; the iodine solution will not change. C. Neither solution will turn blue-black. D. Both solutions will turn blue-black. 29. Which of these processes is demonstrated by the experiment shown in the diagram? A. Active transport B. Isotonic solutions C. Equilibrium D. Diffusion Unit Test Homeostasis-DO NOT WRITE ON THE EXAM. RECORD ALL ANSWERS ON YOUR ANSWER SHEET. Write your response to Question 30 on the back of your answer document. 30. A student cut three identical slices from a potato. She determined the mass of each slice and placed them into labeled beakers. She then added a different solution to each beaker. After 20 minutes, she removed each potato slice from its solution, dried it with a paper towel, and determined its mass. Results of this experiment are shown in the table below. Beaker Solution Change in Mass 1 Distilled Water Gained 3 grams 2 5% Salt Solution Lost 0.3 grams 3 15% Salt Solution Lost 4.6 grams Name and define the process that caused the change in mass for each potato. Explain why each potato slice had a different mass after 20 minutes.