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Life Processes in Animals

Science · Class 7 · All

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Which waste product is removed mainly through the lungs?

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All 15 questions in this quiz

  1. What is the main message of the chapter "Life Processes in Animals"?

    1. Only digestion is necessary for survival.
    2. Different organ systems work together to perform essential life processes that keep animals alive and healthy.
    3. Animals do not require respiration.
    4. Excretion is not important.

  2. Why is a balanced diet important for life processes?

    1. It supplies essential nutrients needed for growth, energy, and repair.
    2. It completely prevents aging.
    3. It removes the need for water.
    4. It eliminates the need for exercise.

  3. Which organ stores urine before it is removed from the body?

    1. Kidney
    2. Liver
    3. Urinary bladder
    4. Stomach

  4. Which system transports nutrients and oxygen throughout the body?

    1. Digestive system
    2. Respiratory system
    3. Circulatory system
    4. Skeletal system

  5. Which waste product is removed mainly through the lungs?

    1. Urea
    2. Carbon dioxide
    3. Salt
    4. Glucose

  6. Which organ helps exchange oxygen and carbon dioxide during respiration?

    1. Liver
    2. Lungs
    3. Kidneys
    4. Brain

  7. What is the main function of red blood cells?

    1. Fight infections
    2. Carry oxygen to body cells
    3. Form blood clots
    4. Digest food

  8. Which organ is the main site of nutrient absorption?

    1. Mouth
    2. Stomach
    3. Small intestine
    4. Large intestine

  9. Which blood vessels carry blood away from the heart?

    1. Veins
    2. Arteries
    3. Capillaries
    4. Nerves

  10. What is the first organ where digestion begins?

    1. Stomach
    2. Mouth
    3. Small intestine
    4. Large intestine

  11. Which organ is mainly responsible for removing waste products from the blood?

    1. Heart
    2. Kidneys
    3. Lungs
    4. Stomach

  12. Which gas do animals inhale during respiration?

    1. Carbon dioxide
    2. Nitrogen
    3. Oxygen
    4. Hydrogen

  13. Which organ pumps blood throughout the body?

    1. Liver
    2. Brain
    3. Heart
    4. Kidney

  14. What is the main function of the digestive system?

    1. To pump blood
    2. To break down food into simpler substances that the body can absorb
    3. To remove waste from the body
    4. To help in movement

  15. Which of the following is a life process in animals?

    1. Respiration
    2. Digestion
    3. Excretion
    4. All of the above