CBSE Class 3 General Knowledge Our Body MCQs

Question. Which statement is true?
Statement A : Sense organs help in obtaining information about the surroundings.
Statement B : Sense organs do not help in obtaining information about the surroundings.
(a) Statement A is true.
(b) Statement B is true.
(c) Both statements A and B are true.
(d) Both statements A and B are false.
Answer : A

Question. Which of the following organ helps us to make decisions?
(a) Eyes
(b) Ears
(c) Brain
(d) Nerves
Answer : C

Question. Which muscles are the busiest in the human body?
(a) Cheek muscles
(b) Eye muscles
(c) Hand muscles
(d) Leg muscles
Answer : B

Question. Identify our body system by which the waste material is removed from the body.
(a) Circulatory system
(b) Nervous system
(c) Skeletal system
(d) Excretory system
Answer : D

Question. Which of the following constitutes our breathing system?
(a) Mouth, nose and windpipe
(b) Mouth and lungs
(c) Stomach, mouth and windpipe
(d) Nose, windpipe and lungs
Answer : D

Question. Identify the name of the organs of digestive system.
(a) Stomach
(b) Mouth
(c) Small intestine
(d) All of these
Answer : D

Question. Which one of the following process involves the exchange of carbon dioxide and oxygen in the cells?
(a) Circulatory
(b) Respiration
(c) Excretion
(d) All of these
Answer : B

Question. Oxygen and digested food in our body react to form which one of the following?
(a) Energy
(b) Vitamins
(c) Minerals
(d) All of these
Answer : A

Question. Individual cells in our body combine to form a tissue. What is formed by the combination of individual bones?
(a) Skeletal system
(b) Organs
(c) Muscular system
(d) All of these
Answer : A

Question. Which one of the following can control the possibility of heart attack?
(a) Hard exercise
(b) Low fat diet
(c) High fat diet
(d) All of these
Answer : B

Question. Which is the longest bone of the human body?
(a) Stapes
(b) Skull
(c) Ribs
(d) Femur
Answer : D

Question. Which of the following is WRONGLY classified?
(a) Digestive system -- Stomach
Skeletal system --- Skull
(b) Digestive system --- Mouth
Skeletal system ---- Ribcage
(c) Digestive system --- Large intestine
Skeletal system ---- Spine
(d) Digestive system ---- Nostril
Skeletal system ------Heart
Answer : D

Question. In which of the following situations given below is the sense of smell, taste, touch and sight used at the same time?
(a) A blind person moving around
(b) A girl using the telephone
(c) A man doing repair work for his bicycle
(d) A woman making and baking cookies
Answer : D

Question. Which of the following senses works for a tiger in the night?
(a) Sense of touch
(b) Sense of smell
(c) Sense of sight
(d) All of these
Answer : B

Question. What system is in charge of the senses?
(a) The Skeletal System
(b) The Circulatory System
(c) The Digestive System
(d) The Nervous System
Answer : D

Question. What provides information to your brain about external conditions?
(a) Heart
(b) Blood vessels
(c) Nerve receptors
(d) Bones
Answer : C

Question. Which organ of our body belongs to both the respiratory and the excretory system?
(a) Lungs
(b) Skin
(c) Kidneys
(d) Intestine
Answer : A

Question. Which one of the following activities is done by muscles?
(a) Walking
(b) Laughing
(c) Washing
(d) All of these
Answer : D

Question. How many bones are present in the human body?
(a) 200
(b) 150
(c) 206
(d) 350
Answer : C

Question. The bone present inside the head is called
(a) skull
(b) spine
(c) ribcage
(d) none of these
Answer : A

Question. Which of the following statements is correct? 
Statement A : The animals can feel changes around them because they have sense organs.
Statement B : The plants do not feel changes around them because they do not have sense organs.
(a) Statement A is correct.
(b) Statement B is correct.
(c) Statement A and B both are correct.
(d) Neither statement A nor statement B is correct.
Answer : A

Question. We breathe fast after running. Why does it happen?
(a) We require more oxygen after running.
(b) We require less oxygen after running.
(c) We require lots of energy after running.
(d) All of these
Answer : A

Question. Consider the following statements :
Statement 1 : Circulatory system consists of the heart and blood vessels.
Statement 2 : The blood vessels carry blood from the heart to different parts of the body.
Which one of the following is correct about the above statements?
(a) Statement 1 is true and 2 is false.
(b) Statement 1 is false and 2 is true.
(c) Both statements are false.
(d) Both statements are true.
Answer : D

Question. I protect the brain. I consist of bones which are fused firmly together to form a shell-like structure. What am I?
(a) Skull
(b) Ribcage
(c) Spine
(d) Sternum
Answer : A

Question. Match the following and select the correct answer:

(a) A-iii, B-iv, C-i, D-ii
(b) A-iii, B-ii, C-i, D-iv
(c) A-iv, B-iii, C-ii, D-i
(d) A-iii, B-i, C-iv, D-ii
Answer : B

Question. The voice box helps us to speak, make sounds and sing. Where is it found?
(a) Hip
(b) Throat
(c) Head
(d) Foot
Answer : B

Question. How does the blood travel through the body?
(a) Through the spine
(b) Through tubes called vessels
(c) Through the intestines
(d) Through nerves
Answer : B

Question. Breaking of a bone is called ______.
(a) nausea
(b) fracture
(c) malaria
(d) measles
Answer : B

Question. We consume milk in many ways. Which of these items does not come from milk?
(a) Curd
(b) Cream
(c) Butter
(d) Cereal
Answer : B

Question. Select the odd one out in this group:
Mouth, Kidney, Pancreas, Small intestine
(a) Mouth
(b) Kidney
(c) Pancreas
(d) Small intestine
Answer : B

Question. Which one of the following is correct about the given statements?
Statement A:We learn to use muscles.
Statement B:We do not require to learn about the use of muscles.
(a) Statement A is true and B is false.
(b) Statement A is false and B is true.
(c) Both are true
(d) Both are false
Answer : A

Question. Which one of the following is the main coordinating and controlling centre of the body?
(a) Heart
(b) Brain
(c) Lungs
(d) Nerves
Answer : B

Question. Find the incorrect statement:
(a) We breathe faster when we run.
(b) We have two kidneys.
(c) Kidneys are located in our chest.
(d) None of these
Answer : C

Question. Riya is running faster to overtake his brother. Rohit is 100 metre ahead of her.
The heartbeat of Riya
(a) would be slower.
(b) would be faster.
(c) remains same.
(d) none of these
Answer : B

Question. Which is the smallest bone of the human body?
(a) Stapes
(b) Skull
(c) Ribs
(d) Femur
Answer : A

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

Question. Which system helps to produce young ones?
(a) Reproductive
(b) Excretory
(c) Respiratory
(d) Circulatory
Answer : C

Question. To remain healthy it is necessary to
(a) take a balanced diet.
(b) exercise regularly.
(c) drink plenty of water.
(d) all of these
Answer : D

Question. Which one of the following is NOT a function of skeletal system?
(a) Gives shape and support
(b) Protects soft inner parts
(c) Pumps blood to all parts
(d) None of these
Answer : C

Question. Which one of the following is mismatched?
(a) Digestive system – digests the food
(b) Respiratory system - helps to take in oxygen and give out carbon dioxide
(c) Nervous system - helps in movement
(d) Excretory system - makes blood pure
Answer : C

Question. Headache, migraine and tumour are the problems of _______ system.
(a) digestive
(b) nervous
(c) reproductive
(d) muscular
Answer : B

Question. Milk and dairy products are rich in ________.
(a) proteins
(b) fats
(c) calcium
(d) both (a) and (c)
Answer : D