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Quiz Chapter 10: Transport in Humans and Animals

10 questions ยท Form 4 Biology Bab 10: Transport in Humans and Animals

Question 1 of 10Score: 0

What path does blood take in a fish single circulatory system?

Full Question List & Answer Key

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

1. What path does blood take in a fish single circulatory system?

  1. A. Heart -> Body tissues -> Gills -> Heart
  2. B. Heart -> Gills -> Body tissues -> Heart
  3. C. Heart -> Lungs -> Heart -> Body tissues
  4. D. Gills -> Heart -> Body tissues -> Gills
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Answer: B

In fish, blood is pumped from the 2-chambered heart to the gills for oxygenation, flows to body tissues, and returns to the heart.

2. Which characteristic distinguishes human mature red blood cells (erythrocytes) from white blood cells (leukocytes)?

  1. A. Presence of a large nucleus
  2. B. Absence of a nucleus and biconcave disc shape
  3. C. Ability to perform phagocytosis
  4. D. Production of specific antibodies
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Answer: B

Mature human red blood cells lack nuclei and have a biconcave disc shape to maximize hemoglobin capacity and surface-area-to-volume ratio.

3. Which animal possesses an open circulatory system where hemolymph bathes organs directly within a hemocoel?

  1. A. Earthworm
  2. B. Grasshopper
  3. C. Toad
  4. D. Salmon
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Answer: B

Insects like grasshoppers have an open circulatory system with hemolymph flowing into the body cavity (hemocoel).

4. Which sequence correctly traces blood flow through the human pulmonary circulation?

  1. A. Left ventricle -> Aorta -> Body -> Vena Cava -> Right atrium
  2. B. Right ventricle -> Pulmonary artery -> Lungs -> Pulmonary vein -> Left atrium
  3. C. Right atrium -> Pulmonary vein -> Lungs -> Pulmonary artery -> Left ventricle
  4. D. Left atrium -> Pulmonary artery -> Lungs -> Pulmonary vein -> Right ventricle
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Answer: B

Pulmonary circulation moves deoxygenated blood from the right ventricle via pulmonary arteries to lungs, returning oxygenated blood via pulmonary veins to the left atrium.

5. During blood clotting, which enzyme converts inactive prothrombin into active thrombin?

  1. A. Fibrinogen
  2. B. Thrombokinase
  3. C. Erepsin
  4. D. Amylase
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Answer: B

Thrombokinase released by clumped platelets and damaged tissues catalyzes the conversion of prothrombin to thrombin.

6. Which blood component is normally present in blood plasma but absent in interstitial (tissue) fluid?

  1. A. Glucose
  2. B. Large plasma proteins (e.g., albumin, fibrinogen)
  3. C. Oxygen
  4. D. Amino acids
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Answer: B

Large plasma proteins cannot pass through the capillary wall pores due to their size, remaining inside the blood.

7. Which two essential factors are required alongside thrombokinase to activate prothrombin into thrombin?

  1. A. Iron ions and Vitamin C
  2. B. Calcium ions (Ca2+) and Vitamin K
  3. C. Sodium ions and Vitamin D
  4. D. Potassium ions and Vitamin A
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Answer: B

Calcium ions (Ca2+) and Vitamin K act as critical cofactors for prothrombin activation.

8. Which structure in the human heart is known as the natural pacemaker because it initiates electrical impulses for cardiac contraction?

  1. A. Atrioventricular (AV) node
  2. B. Sinoatrial (SA) node
  3. C. Bundle of His
  4. D. Purkyne fibers
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Answer: B

The Sinoatrial (SA) node located in the right atrium generates rhythmic electrical signals that set the pace for heart contractions.

9. Which condition is characterized by the accumulation of cholesterol and fatty deposits on the inner walls of arteries?

  1. A. Arteriosclerosis
  2. B. Atherosclerosis
  3. C. Lymphangitis
  4. D. Hemophilia
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Answer: B

Atherosclerosis involves plaque/fatty deposit build-up inside arterial walls, narrowing the lumen.

10. Why is the circulatory system of an amphibian described as a double incomplete system?

  1. A. It has only one atrium and one ventricle.
  2. B. Blood flows through the heart only once per circuit.
  3. C. Oxygenated and deoxygenated blood partially mix in the single ventricle.
  4. D. It lacks blood vessels completely.
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Answer: C

Amphibian hearts have 2 atria but only 1 ventricle, allowing partial mixing of oxygen-rich and oxygen-poor blood.

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