MCQs Science Olympiad for Class 4, Chapter - Skeletal and Nervous System

 

Skeletal System

1. What is the main function of the skeleton? a) To protect the organs
   b) To help with digestion
   c) To produce energy
   d) To store food
   Answer: a) To protect the organs

2. Which of these is part of the skeletal system? a) Heart
   b) Lungs
   c) Bones
   d) Muscles
   Answer: c) Bones

3. How many bones are in the adult human body? a) 206
   b) 305
   c) 150
   d) 250
   Answer: a) 206

4. What is the bone in the upper arm called? a) Tibia
   b) Femur
   c) Humerus
   d) Radius
   Answer: c) Humerus

5. Which bone protects the brain? a) Spine
   b) Rib cage
   c) Skull
   d) Pelvis
   Answer: c) Skull

6. What connects bones to muscles? a) Ligaments
   b) Tendons
   c) Cartilage
   d) Nerves
   Answer: b) Tendons

7. What is the soft part inside the bones that makes blood cells called? a) Bone marrow
   b) Cartilage
   c) Ligament
   d) Tendon
   Answer: a) Bone marrow

8. What are the bones that protect the heart and lungs called? a) Rib cage
   b) Skull
   c) Spine
   d) Pelvis
   Answer: a) Rib cage

9. Which of the following is a type of joint in the human body? a) Fixed joint
   b) Slippery joint
   c) Floating joint
   d) Gliding joint
   Answer: a) Fixed joint

10. What is the largest bone in the human body? a) Humerus
    b) Femur
    c) Tibia
    d) Radius
    Answer: b) Femur

11. Which part of the skeleton supports the body and allows movement? a) Rib cage
    b) Spine
    c) Skull
    d) Pelvis
    Answer: b) Spine

12. Which of the following bones is part of the human hand? a) Phalanges
    b) Tibia
    c) Femur
    d) Sternum
    Answer: a) Phalanges

13. What is the name of the bone in the lower leg? a) Radius
    b) Tibia
    c) Humerus
    d) Clavicle
    Answer: b) Tibia

14. Which type of bone is found in the fingers and toes? a) Long bones
    b) Short bones
    c) Flat bones
    d) Irregular bones
    Answer: a) Long bones

15. What is cartilage? a) A type of bone
    b) A soft tissue between joints
    c) A fluid in the bones
    d) A type of nerve
    Answer: b) A soft tissue between joints

16. How many vertebrae make up the human spine? a) 24
    b) 33
    c) 12
    d) 7
    Answer: b) 33

17. What is the function of the ribs? a) Protect the heart and lungs
    b) Support the legs
    c) Allow movement
    d) Provide balance
    Answer: a) Protect the heart and lungs

18. Which part of the skeletal system is responsible for the production of blood cells? a) Skull
    b) Bone marrow
    c) Ligaments
    d) Tendons
    Answer: b) Bone marrow

19. What is the function of joints in the human body? a) To connect muscles
    b) To store minerals
    c) To allow movement
    d) To produce energy
    Answer: c) To allow movement

20. Which of the following bones protects the spinal cord? a) Skull
    b) Rib cage
    c) Vertebrae
    d) Pelvis
    Answer: c) Vertebrae

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Nervous System

21. What is the main function of the nervous system? a) To control body movements
    b) To help with digestion
    c) To transport oxygen
    d) To produce blood cells
    Answer: a) To control body movements

22. What part of the nervous system controls automatic functions like breathing and heartbeat? a) Brain
    b) Spinal cord
    c) Medulla
    d) Nerves
    Answer: c) Medulla

23. What is the largest part of the human brain? a) Cerebellum
    b) Cerebrum
    c) Brainstem
    d) Spinal cord
    Answer: b) Cerebrum

24. Which part of the brain controls balance and coordination? a) Cerebrum
    b) Cerebellum
    c) Medulla
    d) Spinal cord
    Answer: b) Cerebellum

25. What connects the brain to the spinal cord? a) Medulla
    b) Nerves
    c) Cerebrum
    d) Brainstem
    Answer: d) Brainstem

26. What are the cells that carry messages in the nervous system called? a) Neurons
    b) Blood cells
    c) Muscle cells
    d) Bone cells
    Answer: a) Neurons

27. Which of the following is NOT a part of the nervous system? a) Brain
    b) Spinal cord
    c) Nerves
    d) Heart
    Answer: d) Heart

28. What is the function of sensory nerves? a) To help muscles move
    b) To carry messages to the brain
    c) To carry messages to the spinal cord
    d) To provide balance
    Answer: b) To carry messages to the brain

29. Which part of the nervous system is responsible for thinking, learning, and memory? a) Brain
    b) Spinal cord
    c) Nerves
    d) Medulla
    Answer: a) Brain

30. What is the spinal cord’s primary function? a) To carry messages between the brain and the body
    b) To protect the brain
    c) To pump blood
    d) To store memories
    Answer: a) To carry messages between the brain and the body

31. Which of these is a sense organ that helps the nervous system? a) Heart
    b) Eye
    c) Bone
    d) Muscle
    Answer: b) Eye

32. What part of the brain controls thinking, reasoning, and emotions? a) Cerebellum
    b) Cerebrum
    c) Medulla
    d) Spinal cord
    Answer: b) Cerebrum

33. Which of the following is a function of the nervous system? a) Digestion
    b) Muscle movement
    c) Blood circulation
    d) Bone formation
    Answer: b) Muscle movement

34. What part of the nervous system helps in controlling voluntary actions like walking? a) Spinal cord
    b) Nerves
    c) Brain
    d) Medulla
    Answer: c) Brain

35. What is the name of the nerve that carries messages from the brain to the muscles? a) Sensory nerve
    b) Motor nerve
    c) Spinal nerve
    d) Interneuron
    Answer: b) Motor nerve

36. What does the autonomic nervous system control? a) Voluntary actions
    b) Reflex actions
    c) Involuntary functions like heartbeat and digestion
    d) Memory and thinking
    Answer: c) Involuntary functions like heartbeat and digestion

37. What protects the brain and spinal cord? a) Muscles
    b) Bones
    c) Skin
    d) Ligaments
    Answer: b) Bones

38. Which part of the nervous system helps in coordinating and balancing movements? a) Medulla
    b) Cerebrum
    c) Cerebellum
    d) Spinal cord
    Answer: c) Cerebellum

39. What is the function of the optic nerve? a) To control balance
    b) To carry visual information from the eyes to the brain
    c) To carry sound information to the brain
    d) To control movement
    Answer: b) To carry visual information from the eyes to the brain

40. Which system is responsible for quick responses like pulling your hand away from something hot? a) Circulatory system
    b) Respiratory system
    c) Nervous system
    d) Digestive system
    Answer: c) Nervous system

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Combined Questions (Skeletal & Nervous System)

41. Which of the following helps in both moving the body and protecting organs? a) Skeleton
    b) Muscles
    c) Nerves
    d) Blood vessels
    Answer: a) Skeleton

42. Which organ system allows us to move our muscles and respond to the environment? a) Respiratory system
    b) Nervous system
    c) Circulatory system
    d) Digestive system
    Answer: b) Nervous system

43. Which of the following is NOT part of the skeletal system? a) Bones
    b) Tendons
    c) Muscles
    d) Ligaments
    Answer: c) Muscles

44. The brain, spinal cord, and nerves make up which system? a) Skeletal system
    b) Nervous system
    c) Circulatory system
    d) Respiratory system
    Answer: b) Nervous system

45. Which part of the skeletal system helps in the movement of the body? a) Spine
    b) Skull
    c) Muscles
    d) Joints
    Answer: d) Joints

46. Which of the following systems works together to help us move? a) Digestive and skeletal systems
    b) Nervous and muscular systems
    c) Respiratory and circulatory systems
    d) Skeletal and digestive systems
    Answer: b) Nervous and muscular systems

47. Which is an example of a reflex action controlled by the nervous system? a) Walking
    b) Breathing
    c) Blinking when something comes close to the eyes
    d) Digestion
    Answer: c) Blinking when something comes close to the eyes

48. Which of the following parts of the body helps in the protection of the brain? a) Skull
    b) Ribs
    c) Spine
    d) Pelvis
    Answer: a) Skull

49. What type of joint allows for bending and straightening? a) Ball-and-socket joint
    b) Hinge joint
    c) Pivot joint
    d) Fixed joint
    Answer: b) Hinge joint

50. Which part of the nervous system helps us react quickly to danger? a) Cerebellum
    b) Spinal cord
    c) Brainstem
    d) Medulla
    Answer: b) Spinal cord

51. What part of the body helps us move our arms and legs? a) Brain
    b) Muscles
    c) Bones
    d) Skin
    Answer: b) Muscles

52. What protects the spinal cord in the body? a) Ribs
    b) Spine
    c) Skull
    d) Pelvis
    Answer: b) Spine

53. What is the function of the sensory nerves? a) To send signals from the brain to the muscles
    b) To send signals from the brain to the heart
    c) To send signals from the body to the brain
    d) To control the heartbeat
    Answer: c) To send signals from the body to the brain

54. Which part of the nervous system controls the movement of voluntary muscles? a) Autonomic nervous system
    b) Somatic nervous system
    c) Medulla
    d) Spinal cord
    Answer: b) Somatic nervous system

55. What type of muscle is responsible for involuntary actions like heartbeat? a) Voluntary muscle
    b) Cardiac muscle
    c) Smooth muscle
    d) Skeletal muscle
    Answer: b) Cardiac muscle

56. What is the name of the part of the nervous system that helps in balance? a) Cerebrum
    b) Cerebellum
    c) Spinal cord
    d) Brainstem
    Answer: b) Cerebellum

57. What is the name of the long tube that carries messages from the brain to the rest of the body? a) Spinal cord
    b) Medulla
    c) Nerve
    d) Vein
    Answer: a) Spinal cord

58. Which system works with the skeletal system to allow movement? a) Digestive system
    b) Circulatory system
    c) Nervous system
    d) Respiratory system
    Answer: c) Nervous system

59. What is the space between two bones where movement occurs? a) Ligament
    b) Joint
    c) Cartilage
    d) Tendon
    Answer: b) Joint

60. Which of these helps to cushion the bones and prevent them from rubbing together? a) Ligaments
    b) Tendons
    c) Cartilage
    d) Nerves
    Answer: c) Cartilage