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Quiz Chapter 3: Transportation

10 questions · Form 3 Science Bab 3: Transportation

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which blood vessel carries oxygenated blood from the lungs back to the left atrium of the heart?

  1. Pulmonary artery
  2. Pulmonary vein
  3. Aorta
  4. Vena cava
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Answer: B

The pulmonary vein is an exception among veins because it carries oxygen-rich blood from the lungs to the left atrium.

2. Which cellular component of blood contains hemoglobin and lacks a nucleus at maturity?

  1. Monocyte
  2. Lymphocyte
  3. Erythrocyte (Red blood cell)
  4. Platelet
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Answer: C

Mature red blood cells (erythrocytes) lack a nucleus to maximize space for hemoglobin, which binds and carries oxygen.

3. What structural feature distinguishes veins from arteries?

  1. Veins have thicker muscular walls than arteries
  2. Veins possess internal valves to prevent blood backflow
  3. Veins carry blood away from the heart under high pressure
  4. Veins have walls that are only one cell thick
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Answer: B

Veins carry low-pressure blood toward the heart and contain internal valves along their length to prevent backflow.

4. Which type of blood vessel features a wall that is only one cell thick?

  1. Artery
  2. Arteriole
  3. Vein
  4. Blood capillary
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Answer: D

Capillary walls consist of a single layer of endothelial cells, enabling fast exchange of nutrients and gases via diffusion.

5. What is the term given to the transport of soluble organic products of photosynthesis through phloem tissue?

  1. Transpiration
  2. Translocation
  3. Osmosis
  4. Guttation
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Answer: B

Translocation is the process by which phloem tissue transports dissolved organic sugars from source leaves to sink tissues.

6. What happens if a person with blood group O receives a blood transfusion from a donor with blood group A?

  1. Nothing happens because O is a universal recipient
  2. Anti-A antibodies in group O plasma agglutinate (clump) the donor's group A red blood cells
  3. Anti-B antibodies in group O plasma destroy all platelets in group A blood
  4. Group A red blood cells change into group O cells immediately
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Answer: B

Group O plasma contains both Anti-A and Anti-B antibodies. Giving group A blood causes Anti-A antibodies to bind and clump the donor's A antigens.

7. A person with blood group O can safely donate blood to which blood groups?

  1. Group O only
  2. Group AB only
  3. Groups A and B only
  4. Groups A, B, AB, and O
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Answer: D

Blood group O red cells carry neither A nor B antigens, so they will not trigger antibody reactions in any recipient group (universal donor).

8. Which environmental factor speeds up the transpiration rate when its value increases?

  1. Air humidity
  2. Wind speed
  3. Carbon dioxide concentration
  4. Atmospheric pressure
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Answer: B

Increased wind speed blows away water vapor accumulating near leaf stomata, maintaining a steep concentration gradient for faster evaporation.

9. What is the function of the septum in the human heart?

  1. To regulate the electrical impulses triggering heartbeats
  2. To separate oxygenated blood on the left side from deoxygenated blood on the right side
  3. To pump blood directly into the pulmonary artery
  4. To prevent backflow of blood from the aorta into the left ventricle
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Answer: B

The septum is a thick muscular wall separating the left and right sides of the heart, preventing mixing of oxygenated and deoxygenated blood.

10. Which vertebrate class possesses a single circulatory system where blood flows through the heart only once per complete circuit?

  1. Pisces (Fish)
  2. Amphibia
  3. Reptilia
  4. Aves (Birds)
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Answer: A

Fish have a single circulatory system: deoxygenated blood goes from the 2-chambered heart to gills, then directly to body tissues, and back to the heart.

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