What body systems are described in the concept map above?

1. Science Grade 7 Body Systems and Homeostasis Unit 2 (7.6A, 7.7B, 7.12B, 7.12C, 7.12E, 7.13A,7.13B)

2. 1 What body systems are described in the concept mapabove? A Circulatory and excretory B Endocrine and circulatory C Excretory and endocrine D Nervous andendocrine

3. 2 An animal’s liver isveryimportant. It cleans the blood while also playing a key roleindigestion. To which level of biological organization does the liverbelong? Organ Cell Tissue JOrgansystem

4. 3 The function of the human excretory system is to— break food into small molecules that the body canabsorb dispose of wastes and control body fluid composition Cmove materials from the environment into the body Dproduce enzymes the body needs to break downfood

5. 4 Which table best shows some functions of the circulatory, respiratory, digestive, and endocrine systems? F G H J

6. 5 Devon has cystic fibrosis or CF. It is an inherited condition that causes his body to produce excess mucus and lower than normal levels of digestive enzymes. A person with CF often experiences the followingsymptoms: • frequent lunginfections • poor energylevel • lowappetite • Although all of Devon’s body systems are affected by cystic fibrosis, it is mainly a disorder of which two bodysystems? • circulatory and digestive • digestive and skeletal • digestive andrespiratory • circulatory andrespiratory

7. Cells have similar characteristics aslivingthings. brain,nucleus epidermis, cellmembrane stomach,vacuole Jsmall intestine, cellwall For example, vacuoles in a plant cell function to store water, and similarly, the gall bladder in animals stores bile. Which of the following pairs of structures DO NOT have similar functions?

8. 7 This drawing shows a human bodysystem. What is the primary function of this bodysystem? The protection of vital organs frominjury The chemical breakdown of food into smallerpieces The transport of nutrients, water, and oxygen to body cells The production of hormones that regulate growth and metabolism

9. 8 Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smallermolecules. Which statement best describes changes to food during digestion? The muscle contractions result in physical changes, while the action of the peptidase results in chemicalchanges. The muscle contractions and the action of the peptidase both result only in physicalchanges. The muscle contractions result in chemical changes, while the action of the peptidase results in physicalchanges. JThe muscle contractions and the action of the peptidase both result only in chemicalchanges.

10. 9 A student listed how different parts of the body work to aid in the digestion offood. Which of the following is a chemical change that occurs to the food? The reduction in size of food particles as food ischewed The movement of food to the stomach after food isswallowed The breakdown of molecules of food by enzymes and acid in thestomach None of theabove

11. 10 When does the force of gravity hinder the movement of blood in the circulatorysystem? when blood moves from the heart to theabdomen when blood moves from the heart to thebrain when blood moves from the legs to theheart when blood moves from the heart to thelegs F I and IV G II and III H II and IV J III andIV

12. 11 During the hot, dry African summer months, African clawed frogs can dig one-foot deep burrows into the mud. The frogs leave a small hole open to supply air. They can stay in these burrows for up to 10months. These frogs MOST likely live in these burrows in order to— staywarm findmates capture food conservewater

13. 12 Which cell organelle is most similar in function to an organism’s nervoussystem? Cytoplasm Cellmembrane Nucleus JMitochondria

14. 13 During hibernation, the ground squirrel may breathe every four minutes, its heart beats four times a minute, and its body temperature drops from a normal temperature of about 99 degrees to just abovefreezing. What is the purpose ofhibernation? to survive hottemperatures to conserve energy when food isscarce to get neededsleep to hide from predators

15. 14 A person with an infection begins to feel hot and feverish. This response MOST likely helps the body fight infection by— forcing the bacteria to leave thebody trapping harmful bacteria inside the body keeping bacteria from entering the body Jmaking it hard for bacteria to grow in thebody BE SURE YOU HAVE RECORDED ALL OF YOUR ANSWERS ON YOUR ANSWERDOCUMENT STOP