50(MCQs) related to the 2nd chapter of class 4th science
(human body)
Skeletal System
- What is the main function of the skeletal system?
A) To move the body
B) To digest food
C) To transmit messages
D) To provide support and protection
Answer: D) To provide support and protection
- Which bone is the longest in the human body?
A) Femur
B) Humerus
C) Tibia
D) Fibula
Answer: A) Femur
- What is the name of the joint that connects the arm to the shoulder?
A) Elbow joint
B) Shoulder joint
C) Wrist joint
D) Hip joint
Answer: B) Shoulder joint
Muscular System
- What is the main function of the muscular system?
A) To move the body
B) To digest food
C) To transmit messages
D) To provide support and protection
Answer: A) To move the body
- Which muscle is responsible for pumping blood throughout the body?
A) Bicep
B) Tricep
C) Heart
D) Diaphragm
Answer: C) Heart
- What is the name of the muscle that separates the chest cavity from the abdominal cavity?
A) Diaphragm
B) Abdominal muscle
C) Intercostal muscle
D) Pectoral muscle
Answer: A) Diaphragm
Nervous System
- What is the main function of the nervous system?
A) To move the body
B) To digest food
C) To transmit messages
D) To provide support and protection
Answer: C) To transmit messages
- Which part of the brain is responsible for controlling movement?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Spinal cord
Answer: B) Cerebellum
- What is the name of the nerve that carries messages from the eye to the brain?
A) Optic nerve
B) Olfactory nerve
C) Vagus nerve
D) Sciatic nerve
Answer: A) Optic nerve
Circulatory System
- What is the main function of the circulatory system?
A) To move the body
B) To digest food
C) To transmit messages
D) To transport oxygen and nutrients
Answer: D) To transport oxygen and nutrients
- Which blood vessel carries oxygenated blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
C) Aorta
D) Vena cava
Answer: B) Pulmonary vein
- What is the name of the blood vessel that carries deoxygenated blood from the body to the heart?
A) Artery
B) Vein
C) Capillary
D) Vena cava
Answer: D) Vena cava
Respiratory System
- What is the main function of the respiratory system?
A) To move the body
B) To digest food
C) To transmit messages
D) To breathe
Answer: D) To breathe
- Which part of the respiratory system is responsible for exchanging oxygen and carbon dioxide?
A) Trachea
B) Bronchi
C) Lungs
D) Diaphragm
Answer: C) Lungs
- What is the name of the tube that carries air from the throat to the lungs?
A) Trachea
B) Bronchi
C) Bronchioles
D) Alveoli
Answer: A) Trachea
Digestive System
- What is the main function of the digestive system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To digest food
Answer: D) To digest food
- Which part of the digestive system is responsible for breaking down food into smaller molecules?
A) Mouth
B) Esophagus
C) Stomach
D) Small intestine
Answer: C) Stomach
- What is the name of the tube that carries food from the mouth to the stomach?
A) Esophagus
B) Trachea
C) Bronchi
D) Duodenum
Answer: A) Esophagus
Integumentary System
- What is the main function of the integumentary system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To regulate body temperature
Answer: D) To regulate body temperature
- Which part of the integumentary system is responsible for producing sweat?
A) Skin
B) Hair
C) Nails
D) Sweat glands
Answer: D) Sweat glands
Endocrine System
- What is the main function of the endocrine system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To produce hormones
Answer: D) To produce hormones
- Which gland is responsible for producing insulin?
A) Pancreas
B) Thyroid gland
C) Adrenal gland
D) Pituitary gland
Answer: A) Pancreas
- What is the name of the hormone that regulates growth and development?
A) Insulin
B) Thyroid hormone
C) Growth hormone
D) Adrenaline
Answer: C) Growth hormone
Urinary System
- What is the main function of the urinary system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To remove waste and excess fluids
Answer: D) To remove waste and excess fluids
- Which organ is responsible for filtering waste and excess fluids from the blood?
A) Kidneys
B) Liver
C) Lungs
D) Heart
Answer: A) Kidneys
- What is the name of the tube that carries urine from the kidneys to the bladder?
A) Ureter
B) Urethra
C) Urinary tract
D) Kidney tubule
Answer: A) Ureter
Reproductive System
- What is the main function of the reproductive system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To produce offspring
Answer: D) To produce offspring
- Which organ is responsible for producing sperm in males?
A) Testes
B) Ovaries
C) Uterus
D) Prostate gland
Answer: A) Testes
- What is the name of the hormone that regulates the menstrual cycle in females?
A) Estrogen
B) Progesterone
C) Testosterone
D) Oxytocin
Answer: A) Estrogen
Immune System
- What is the main function of the immune system?
A) To move the body
B) To transmit messages
C) To provide support and protection
D) To defend against pathogens
Answer: D) To defend against pathogens
- Which cell is responsible for fighting infections in the body?
A) Red blood cell
B) White blood cell
C) Platelet
D) Stem cell
Answer: B) White blood cell
- What is the name of the protein that helps to fight infections in the body?
A) Antibody
B) Antigen
C) Vaccine
D) Immune system
Answer: A) Antibody
Immune System (continued)
- What is the name of the organ that filters the blood and helps to fight infections?
A) Spleen
B) Liver
C) Kidneys
D) Lungs
Answer: A) Spleen
- Which type of immune cell is responsible for remembering specific pathogens?
A) B cell
B) T cell
C) Macrophage
D) Neutrophil
Answer: A) B cell
- What is the name of the process by which the immune system produces antibodies?
A) Active immunity
B) Passive immunity
C) Immunization
D) Vaccination
Answer: A) Active immunity
Human Body Systems (review)
- Which system is responsible for moving the body?
A) Muscular system
B) Skeletal system
C) Circulatory system
D) Nervous system
Answer: A) Muscular system
- Which system is responsible for transmitting messages?
A) Nervous system
B) Muscular system
C) Skeletal system
D) Circulatory system
Answer: A) Nervous system
- Which system is responsible for providing support and protection?
A) Skeletal system
B) Muscular system
C) Circulatory system
D) Nervous system
Answer: A) Skeletal system
- Which system is responsible for transporting oxygen and nutrients?
A) Circulatory system
B) Muscular system
C) Skeletal system
D) Nervous system
Answer: A) Circulatory system
- Which system is responsible for removing waste and excess fluids?
A) Urinary system
B) Circulatory system
C) Muscular system
D) Skeletal system
Answer: A) Urinary syste
Human Body Systems (review)
- Which system is responsible for digesting food?
A) Digestive system
B) Circulatory system
C) Muscular system
D) Nervous system
Answer: A) Digestive system
- Which system is responsible for regulating body temperature?
A) Integumentary system
B) Circulatory system
C) Muscular system
D) Nervous system
Answer: A) Integumentary system
- Which system is responsible for producing hormones?
A) Endocrine system
B) Circulatory system
C) Muscular system
D) Nervous system
Answer: A) Endocrine system
- Which system is responsible for protecting the body from pathogens?
A) Immune system
B) Circulatory system
C) Muscular system
D) Nervous system
Answer: A) Immune system
- Which system is responsible for coordinating body functions?
A) Nervous system
B) Circulatory system
C) Muscular system
D) Skeletal system
Answer: A) Nervous system
Human Body Organs (review)
- Which organ is responsible for pumping blood throughout the body?
A) Heart
B) Lungs
C) Liver
D) Kidneys
Answer: A) Heart
- Which organ is responsible for filtering waste and excess fluids from the blood?
A) Kidneys
B) Liver
C) Lungs
D) Heart
Answer: A) Kidneys
- Which organ is responsible for producing bile to aid in digestion?
A) Liver
B) Pancreas
C) Gallbladder
D) Small intestine
Answer: A) Liver
- Which organ is responsible for storing oxygen for the body?
A) Lungs
B) Liver
C) Kidneys
D) Heart
Answer: A) Lungs
- Which organ is responsible for producing insulin to regulate blood sugar levels?
A) Pancreas
B) Liver
C) Kidneys
D) Heart
Answer: A) Pancreas