1. Science PSSA Study Session

2. The diagram below shows a human body system.
What are two of the functions performed by this body system?
(1) protects and supports the body (2) produces and transports oxygen within the body (3) produces and excretes waste products (4) controls and coordinates body activities

3. The diagram below shows a human body system.
What are two of the functions performed by this body system?
(1) protects and supports the body (2) produces and transports oxygen within the body (3) produces and excretes waste products (4) controls and coordinates body activities

4. 2. The main function of the human digestive system is to
(1) break down foods for absorption into the blood (2) exchange oxygen and carbon dioxide in the lungs (3) release energy from sugars within the cells (4) carry nutrients to all parts of the body

5. 2. The main function of the human digestive system is to
(1) break down foods for absorption into the blood (2) exchange oxygen and carbon dioxide in the lungs (3) release energy from sugars within the cells (4) carry nutrients to all parts of the body

6. 3. Which three systems of the human body function together to move and control body parts?
(1) nervous, skeletal, and muscular (2) muscular, endocrine, and excretory (3) digestive, excretory, and reproductive (4) circulatory, endocrine, and respiratory

7. 3. Which three systems of the human body function together to move and control body parts?
(1) nervous, skeletal, and muscular (2) muscular, endocrine, and excretory (3) digestive, excretory, and reproductive (4) circulatory, endocrine, and respiratory

8. (1) respiratory (2) endocrine (3) digestive (4) circulatory
4. The labeled organs in the diagram below are part of which human
body system?
(1) respiratory (2) endocrine (3) digestive (4) circulatory

9. (1) respiratory (2) endocrine (3) digestive (4) circulatory
4. The labeled organs in the diagram below are part of which human
body system?
(1) respiratory (2) endocrine (3) digestive (4) circulatory

10. The diagram below shows a part of a human body system.
5. The possible movement represented by the arrows in the diagram
is coordinated by the (1) circulatory system (2) excretory system (3) nervous system (4) reproductive system

11. The diagram below shows a part of a human body system.
5. The possible movement represented by the arrows in the diagram
is coordinated by the (1) circulatory system (2) excretory system (3) nervous system (4) reproductive system

12. 6. The endocrine system produces chemicals that affect organ functions
6. The endocrine system produces chemicals that affect organ functions. These chemicals are called (1) nutrients (2) hormones (3) microbes (4) wastes

13. 6. The endocrine system produces chemicals that affect organ functions
6. The endocrine system produces chemicals that affect organ functions. These chemicals are called (1) nutrients (2) hormones (3) microbes (4) wastes

14. 7. Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which system responds by delivering more oxygen to these cells? (1) digestive (2) nervous (3) circulatory (4) endocrine

15. 7. Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which system responds by delivering more oxygen to these cells? (1) digestive (2) nervous (3) circulatory (4) endocrine

16. 8. Which human body systems are directly involved in reflex actions, such as knee jerk, blinking, and jumping when startled? (1) circulatory and respiratory (2) digestive and excretory (3) nervous and muscular (4) reproductive and skeletal

17. 8. Which human body systems are directly involved in reflex actions, such as knee jerk, blinking, and jumping when startled? (1) circulatory and respiratory (2) digestive and excretory (3) nervous and muscular (4) reproductive and skeletal

18. 9. In which human body system are hormones produced
9. In which human body system are hormones produced? (1) respiratory (2) endocrine (3) nervous (4) digestive

19. 9. In which human body system are hormones produced
9. In which human body system are hormones produced? (1) respiratory (2) endocrine (3) nervous (4) digestive

20. 10. Which body system is responsible for the elimination of liquid and gaseous wastes? (1) nervous (2) skeletal (3) excretory (4) digestive

21. 10. Which body system is responsible for the elimination of liquid and gaseous wastes? (1) nervous (2) skeletal (3) excretory (4) digestive

22. 11. What is the main function of the circulatory system
11. What is the main function of the circulatory system? (1) secrete enzymes (2) digest proteins (3) produce hormones (4) transport materials

23. 11. What is the main function of the circulatory system
11. What is the main function of the circulatory system? (1) secrete enzymes (2) digest proteins (3) produce hormones (4) transport materials

24. The diagram below represents a magnified view of an air sac
in the human lung. The white arrows indicate blood flow.
12. Which two systems are interacting in this diagram? (1) skeletal and muscular (2) nervous and endocrine (3) reproductive and digestive (4) respiratory and circulatory

25. The diagram below represents a magnified view of an air sac
in the human lung. The white arrows indicate blood flow.
12. Which two systems are interacting in this diagram? (1) skeletal and muscular (2) nervous and endocrine (3) reproductive and digestive (4) respiratory and circulatory

26. The diagram below shows several organs in the human digestive system.
13. Explain two ways that food is changed as it passes through the
digestive system. [2] (1) __________________________________________________________________________ (2) __________________________________________________________________________

27. The diagram below shows several organs in the human digestive system.
13. Explain two ways that food is changed as it passes through the
digestive system. [2] Teeth break up food; Salvia glands release saliva to soften food; Stomach releases acid to break down food; Through the small intestine nutrients are absorbed into the body; Large intestine water is removed from waste and absorbed into the body for hydration

28. 14. Humans sweat when they are in the hot sun
14. Humans sweat when they are in the hot sun. How does sweating help humans to maintain a constant body temperature? [1] ____________________________________________________________________________________________________________________________________________________

29. 14. Humans sweat when they are in the hot sun
14. Humans sweat when they are in the hot sun. How does sweating help humans to maintain a constant body temperature? [1] _Sweat evaporates as the body is cooled

30. 15. The kidneys, which remove dissolved wastes from the blood, are organs of the (1) endocrine system (2) excretory system (3) skeletal system (4) nervous system

31. 15. The kidneys, which remove dissolved wastes from the blood, are organs of the (1) endocrine system (2) excretory system (3) skeletal system (4) nervous system

32. 16. Nutrients from digested food enter the blood stream through the process of (1) absorption (2) elimination (3) respiration (4) secretion

33. 16. Nutrients from digested food enter the blood stream through the process of (1) absorption (2) elimination (3) respiration (4) secretion

34. 17. The two human body systems shown below interact to perform several functions for the whole organism. Describe how gas exchange occurs when the circulatory and respiratory systems work together. [2]

35. 17.The two human body systems shown below interact to perform several functions for the whole organism. Describe how gas exchange occurs when the circulatory and respiratory systems work together. [2]
Air is inhaled and enters the lungs. It goes to the alveoli where the absorption of oxygen occurs in the capillaries. The oxygen is carried by red blood cells to body cells for use. Than the red blood flows back to the heart to be directed to the lungs for more oxygen. The loop is repeated.

36. 19. Base your answers to the following questions on the diagram below which shows the process of sexual reproduction.
Identify the sex cell shown at A. [1] __________________________________
Identify the sex cell shown at B. [1] __________________________________
Identify the reproductive process that is occurring at C. [1] ___________________________________
Identify the process that is occurring between E and F. [1] __________________________________

37. 19. Base your answers to the following questions on the diagram below which shows the process of sexual reproduction.
Identify the sex cell shown at A. [1] _______Sperm Cell___________________
Identify the sex cell shown at B. [1] ________Egg Cell___________________
Identify the reproductive process that is occurring at C. [1] _____Fertilization ___________________
Identify the process that is occurring between E and F. [1] ___________Cell Division_____________

38. 20. When do organs begin to develop in humans
20. When do organs begin to develop in humans? (1) in the sperm cell before fertilization (2) before fertilization and after birth (3) in the egg cell after fertilization (4) after fertilization and before birth

39. 20. When do organs begin to develop in humans
20. When do organs begin to develop in humans? (1) in the sperm cell before fertilization (2) before fertilization and after birth (3) in the egg cell after fertilization (4) after fertilization and before birth

40. 21. The vast variety of different traits found in humans results from (1) intensive training and education (2) sexual reproduction and mutations (3) exercise and conditioning (4) birth defects and recessive genes

41. 21. The vast variety of different traits found in humans results from (1) intensive training and education (2) sexual reproduction and mutations (3) exercise and conditioning (4) birth defects and recessive genes

42. 22. Base your answers to the following questions on the diagram below and on your knowledge of science. The diagram shows a model of sexual reproduction. The lines in each cell represent genetic material (chromosomes).
Which letter in the diagram represents a female sex cell? [1] ______________________
Which process is occurring at C? [1] _______________________________
What evidence in the diagram shows that sexual reproduction occurred? [1] ____________________________________________________________________________

43. 22. Base your answers to the following questions on the diagram below and on your knowledge of science. The diagram shows a model of sexual reproduction. The lines in each cell represent genetic material (chromosomes).
Which letter in the diagram represents a female sex cell? [1] ______Egg Cell_______________
Which process is occurring at C? [1] _________Fertilization____________
What evidence in the diagram shows that sexual reproduction occurred? [1] _____The final picture (D) is showing 4 pieces of genetic material____________________

44. 23. In which process is oxygen used to release the energy stored in food? (1) photosynthesis (2) respiration (3) digestion (4) reproduction

45. 23. In which process is oxygen used to release the energy stored in food? (1) photosynthesis (2) respiration (3) digestion (4) reproduction

46. 24. In sexual reproduction, what fraction of genes does each parent contribute to the offspring? (1) 1/4 (2) 1/3 (3) 1/2 (4) 3/4

47. 24. In sexual reproduction, what fraction of genes does each parent contribute to the offspring? (1) 1/4 (2) 1/3 (3) 1/2 (4) 3/4

48. 25. Base your answers to the following questions on the diagram below.
Select one structure labeled in the human system above and explain how it contributes to the way the human system functions. [1]
   Human Structure: _________________________________________________________    Explanation: _____________________________________________________________

49. 25. Base your answers to the following questions on the diagram below.
Select one structure labeled in the human system above and explain how it contributes to the way the human system functions. [1]
   Human Structure: ____Heart/ Blood Vessel_______________________________________________    Explanation: ____The heart pumps blood to the body./ Blood vessel allows blood to be transported._

50. 26. Running to escape danger is an action that requires the nervous system to coordinate the interaction of which two body systems? (1) digestive and endocrine (2) muscular and skeletal (3) reproductive and excretory (4) circulatory and digestive

51. 26. Running to escape danger is an action that requires the nervous system to coordinate the interaction of which two body systems? (1) digestive and endocrine (2) muscular and skeletal (3) reproductive and excretory (4) circulatory and digestive

52. 27. What are produced in both the male and female reproductive systems in humans? (1) sperm (2) nutrients (3) fertilized eggs (4) sex cells

53. 27. What are produced in both the male and female reproductive systems in humans? (1) sperm (2) nutrients (3) fertilized eggs (4) sex cells

54. 28. The interaction of the skeletal and muscular systems to produce locomotion is coordinated by which human body system? (1) circulatory (2) excretory (3) nervous (4) respiratory

55. 28. The interaction of the skeletal and muscular systems to produce locomotion is coordinated by which human body system? (1) circulatory (2) excretory (3) nervous (4) respiratory