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7th Grade Life Science Midterm Study Guide 2016
Digestive System:
1. Which two organ systems work to break down food and deliver it to the body?
2. Trace the path of food through the digestive system starting with the mouth.
3. Explain how both chemical and mechanical digestion are responsible in the mouth?
4. Explain how food gets down the esophagus. What is that process called?
5. Give an example of a carbohydrate. What do you get from it?
6. Give an example of a protein. Do you get energy from it?
7. Give an example of a lipid. What do you get from it?
8. In which two organs does the digestion of food primarily take place?
9. What is the function of the esophagus?
10. Which nutrient is primarily digested in the stomach? What evidence do you have for
11. Where are most of the nutrients absorbed into the bloodstream?
12. What is the main job of the digestive system?
13. Which organ would most likely be the cause if you are experiencing diarrhea?
14. Which organ digests proteins but not lipids? What evidence do you have for
15. The stomach exhibits this type of digestion by churning its contents with muscular
16. Your Halloween candy is likely to be high in these nutrients:
17. Oil is made entirely of these nutrients:
18. How can you prove that your body doesn’t need gravity to move food to the
19. How did you prove that you don’t need to chew food to digest it?
20. During the food-bag lab, we observed that there is a significant decrease in mass
as it passes though the small intestines. What accounts for that decrease?
21. Ms. Leyland orders a hamburger at Burger King so she can have it her way. Her
burger only has beef, lettuce, and mayonnaise between sliced bread. Write
down in what parts of the body each part of the sandwich will be digested.
Circulatory System:
Use the graph to answer the following: (22-24)
22. What is the best way to describe the relationship between area and velocity? In other
words: As area goes up, the velocity…
23. Which blood vessel has the highest speed?
24. Which blood vessel has the highest blood pressure and velocity?
25. Explain why your heartbeat speeds up as you exercise.
26. What is the main job of the circulatory system?
27. Where do nutrients leave the bloodstream to enter body cells?
28. What blood vessels are wrapped around the alveoli in the lungs?
29. What is blood made of? Name all 4 components and their functions.
30. Complete the table below.
Blood Vessel
What happens to the blood while it’s in the lungs?
What color is deoxygenated blood? How do you know this?
What color is oxygenated blood? How do you know this?
Respiratory System:
34. Which organ do you breathe out of when you need extra air? Why?
35. List the correct path of air through the respiratory system.
36. Which two human body organs work together to make sure oxygen is transported to
other areas of the body?
37. What is the main job of the respiratory system?
38. Where does the exchange of oxygen and carbon dioxide occur?
39. Explain how the respiratory and circulatory systems work together?
40. Which organ is most likely the cause of coughing up large amounts of mucus and
shortness of breath?
41. Why are there capillaries in the lungs?
42. Explain the journey of an Oxygen molecule. Include how it enters the body, what
parts of the respiratory system it passes through, and what happens to it
after it exits the alveoli.
Cellular Respiration:
43. What is cellular respiration?
44. What does the circulatory system do to help us get energy in our cells?
45. Write the respiration equation in words?
46. Where do the materials of cellular respiration get processed?
47. How do the digestive, respiratory and circulatory systems work together to
accomplish cellular respiration within the body?
Muscular and Nervous System:
48. What is the function of the nervous system? Explain.
49. What does voluntary and involuntary mean? Which muscles go in each category?
50. How do signals tell your hand to move it away from danger like a flame? Explain.
51. What parts make up the peripheral and central nervous system?
52. Fill in the chart with the 3 types of muscles and their functions.
Type of Muscle