Chapter 7: Human Body Systems and Interactions

Question 1

The __________ system is responsible for breaking down food into nutrients.

Answer 1

digestive

Question 2

The main organ of the circulatory system is the __________.

Answer 2

heart

Question 3

Oxygen is absorbed into the blood through tiny air sacs called __________.

Answer 3

alveoli

Question 4

The brain and spinal cord are part of the __________ system.

Answer 4

nervous

Question 5

The __________ system removes waste products from the body.

Answer 5

excretory

Question 6

White blood cells are part of the __________ system.

Answer 6

immune

Question 7

The system that allows humans to produce offspring is the __________ system.

Answer 7

reproductive

Question 8

The __________ system transports oxygen, nutrients, and waste throughout the body.

Answer 8

circulatory

Question 9

The large intestine is part of the __________ system.

Answer 9

digestive

Question 10

Sweat is one way the __________ system removes waste from the body.

Answer 10

excretory

Question 11

The __________ are the main organs of the respiratory system.

Answer 11

lungs

Question 12

The __________ connect muscles to bones.

Answer 12

tendons

Question 13

The bones and muscles together form the __________ system.

Answer 13

musculoskeletal

Question 14

The __________ system helps protect the body from diseases.

Answer 14

immune

Question 15

The spinal cord sends messages to and from the brain in the __________ system.

Answer 15

nervous

Question 16

The __________ system includes the ovaries and testes.

Answer 16

reproductive

Question 17

The heart pumps __________ through the body.

Answer 17

blood

Question 18

The __________ system includes the kidneys and bladder.

Answer 18

excretory

Question 19

The nervous system helps maintain balance by controlling __________.

Answer 19

movement

Question 20

The body’s ability to stay in balance is called __________.

Answer 20

homeostasis

Question 21

The system that helps you breathe is the __________ system.

Answer 21

respiratory

Question 22

The liver and pancreas help with __________.

Answer 22

digestion

Question 23

The __________ system allows movement by contracting muscles.

Answer 23

muscular

Question 24

Bones meet at __________, which allow movement.

Answer 24

joints

Question 25

The immune system relies on the __________ system to move white blood cells.

Answer 25

circulatory

Question 26

Which system is primarily responsible for transporting oxygen and nutrients throughout the body? A. Respiratory B. Circulatory C. Digestive D. Nervous

Answer 26

Answer: B Explanation: The circulatory system transports blood, which carries oxygen and nutrients.

Question 27

What is the main organ of the respiratory system? A. Heart B. Liver C. Lungs D. Kidneys

Answer 27

Answer: C Explanation: The lungs are responsible for gas exchange—taking in oxygen and releasing carbon dioxide.

Question 28

What part of the body filters waste from the blood? A. Stomach B. Lungs C. Kidneys D. Intestines

Answer 28

Answer: C Explanation: The kidneys filter waste from the blood and produce urine.

Question 29

Which system protects the body from disease? A. Immune B. Circulatory C. Digestive D. Skeletal

Answer 29

Answer: A Explanation: The immune system defends the body against pathogens and disease.

Question 30

Which two systems work together to allow movement? A. Respiratory and Digestive B. Nervous and Immune C. Muscular and Skeletal D. Circulatory and Respiratory

Answer 30

Answer: C Explanation: Muscles move the bones of the skeleton, allowing movement.

Question 31

What is the purpose of the digestive system? A. To filter blood B. To produce hormones C. To break down food and absorb nutrients D. To transport oxygen

Answer 31

Answer: C Explanation: The digestive system breaks down food and absorbs nutrients.

Question 32

Which system helps regulate body temperature through sweating? A. Circulatory B. Immune C. Digestive D. Excretory

Answer 32

Answer: D Explanation: The excretory system eliminates waste, including sweat through the skin.

Question 33

Where does gas exchange occur in the lungs? A. Trachea B. Alveoli C. Bronchi D. Diaphragm

Answer 33

Answer: B Explanation: Alveoli are tiny air sacs where oxygen and carbon dioxide are exchanged.

Question 34

Which organ system controls your body's response to external stimuli? A. Immune B. Nervous C. Circulatory D. Skeletal

Answer 34

Answer: B Explanation: The nervous system processes sensory information and sends signals to the body.

Question 35

Which system is responsible for removing urine from the body? A. Digestive B. Circulatory C. Excretory D. Nervous

Answer 35

Answer: C Explanation: The excretory system includes organs that remove liquid waste.

Question 36

Which system contains the brain and spinal cord? A. Respiratory B. Digestive C. Immune D. Nervous

Answer 36

Answer: D Explanation: The brain and spinal cord make up the central nervous system.

Question 37

What connects bones to other bones? A. Tendons B. Ligaments C. Muscles D. Cartilage

Answer 37

Answer: B Explanation: Ligaments connect bone to bone at joints.

Question 38

Which body system produces hormones that regulate growth and development? A. Circulatory B. Endocrine C. Digestive D. Excretory

Answer 38

Answer: B Explanation: The endocrine system secretes hormones that regulate body functions.

Question 39

Which organ stores urine before it is released? A. Liver B. Kidney C. Bladder D. Pancreas

Answer 39

Answer: C Explanation: The bladder stores urine until it is excreted.

Question 40

What system do the ovaries belong to? A. Muscular B. Nervous C. Reproductive D. Immune

Answer 40

Answer: C Explanation: The reproductive system includes organs that produce gametes.

Question 41

Which part of the blood fights infections? A. Red blood cells B. White blood cells C. Plasma D. Platelets

Answer 41

Answer: B Explanation: White blood cells attack and destroy harmful organisms.

Question 42

Which system includes muscles that contract to create movement? A. Nervous B. Digestive C. Muscular D. Immune

Answer 42

Answer: C Explanation: Muscles contract to move bones, enabling body movement.

Question 43

Which system is activated when you get a fever? A. Nervous B. Respiratory C. Circulatory D. Immune

Answer 43

Answer: D Explanation: The immune system triggers responses like fever to combat infection.

Question 44

The circulatory system includes the heart, blood, and __________. A. Lungs B. Intestines C. Blood vessels D. Bones

Answer 44

Answer: C Explanation: Blood vessels are part of the circulatory system that carry blood.

Question 45

Homeostasis refers to the body's ability to maintain __________. A. Energy B. Internal balance C. Waste D. Oxygen

Answer 45

Answer: B Explanation: Homeostasis keeps internal conditions like temperature and pH stable.

Question 46

Which system delivers messages through electrical signals? A. Immune B. Nervous C. Circulatory D. Muscular

Answer 46

Answer: B Explanation: The nervous system uses electrical signals for fast communication.

Question 47

Sweating during exercise helps your body maintain __________. A. Blood sugar B. Heart rate C. Body temperature D. Breathing rate

Answer 47

Answer: C Explanation: Sweating is a cooling mechanism that helps regulate body temperature.

Question 48

The lungs are involved in which two body functions? A. Smelling and hearing B. Breathing and waste removal C. Digestion and growth D. Circulation and balance

Answer 48

Answer: B Explanation: The lungs help with breathing and removing waste gases like CO₂.

Question 49

Which system is most responsible for controlling voluntary muscle movement? A. Digestive B. Circulatory C. Nervous D. Endocrine

Answer 49

Answer: C Explanation: The nervous system controls voluntary muscle movements.

Question 50

Which system includes bones, joints, and ligaments? A. Immune B. Musculoskeletal C. Circulatory D. Excretory

Answer 50

Answer: B Explanation: The musculoskeletal system supports the body and enables movement.