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Quiz Chapter 10: Transport in Humans and Animals

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

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. What soluble plasma protein is converted by thrombin into insoluble threads during clot formation?

  1. A. Fibrinogen
  2. B. Prothrombin
  3. C. Albumin
  4. D. Globulin
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Answer: A

Thrombin hydrolyzes soluble fibrinogen into insoluble fibrin strands that trap cells to seal wounds.

2. What movement assists the flow of lymph along lymphatic vessels towards the subclavian veins?

  1. A. Pumping action of the heart
  2. B. Contraction of surrounding skeletal muscles and presence of internal valves
  3. C. High arterial blood pressure
  4. D. Active transport by epithelial cells
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Answer: B

Lymphatic vessels lack a central pump; lymph moves via skeletal muscle contractions squeezing vessels, guided by internal one-way valves.

3. The thoracic duct drains lymph collected from most of the body back into which major blood vessel?

  1. A. Right subclavian vein
  2. B. Left subclavian vein
  3. C. Hepatic portal vein
  4. D. Inferior vena cava
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Answer: B

The thoracic duct re-enters the venous bloodstream by emptying lymph into the left subclavian vein.

4. 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.

5. 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.

6. What is the consequence of a blockage in the coronary arteries of the heart?

  1. A. Pulmonary embolism
  2. B. Myocardial infarction (heart attack)
  3. C. Renal failure
  4. D. Cerebral hemorrhage
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Answer: B

Coronary arteries supply oxygen to cardiac muscle. Blockage starves heart cells of oxygen, leading to myocardial infarction.

7. 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.

8. 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.

9. During cardiac contraction, electrical impulses travel from the AV node down the septum through which specialized conducting tissue?

  1. A. Sinoatrial node
  2. B. Bundle of His
  3. C. Coronary sinus
  4. D. Bicuspid valve
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Answer: B

The Bundle of His conducts electrical signals from the AV node down the interventricular septum toward Purkyne fibers.

10. 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.

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