Chapter 3: Transportation – The Circulatory System — Online MCQ Test
BIOLOGY · CLASS 10th · Telangana State Board
Practice Chapter 3: Transportation – The Circulatory System with a free chapter-wise online MCQ test.
This chapter covers: This chapter examines how nutrients gases and waste products circulate throughout living organisms. It covers the internal structure and working mechanism of the human heart blood....
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Chapter 3: Transportation – The Circulatory System — Important Questions & Answers
Which of the following is the primary function of the circulatory system?
- A. Transport of nutrients, gases, and waste products throughout the body
- B. Production of blood cells
- C. Storage of nutrients
- D. Regulation of body temperature only
Answer: A. Transport of nutrients, gases, and waste products throughout the body
The circulatory system's main function is to transport nutrients, oxygen, carbon dioxide, and waste products to and from cells throughout the body.
The circulatory system's main function is to transport nutrients, oxygen, carbon dioxide, and waste products to and from cells throughout the body.
What is the correct sequence of blood flow through the heart chambers?
- A. Right atrium → Right ventricle → Left atrium → Left ventricle
- B. Left atrium → Left ventricle → Right atrium → Right ventricle
- C. Right atrium → Left atrium → Right ventricle → Left ventricle
- D. Right ventricle → Right atrium → Left ventricle → Left atrium
Answer: A. Right atrium → Right ventricle → Left atrium → Left ventricle
Blood flows from the right atrium to the right ventricle, then to the lungs, returns to the left atrium, and finally to the left ventricle before being pumped to the body.
Blood flows from the right atrium to the right ventricle, then to the lungs, returns to the left atrium, and finally to the left ventricle before being pumped to the body.
How many chambers does the human heart have, and what are they called?
- A. 2 chambers: atrium and ventricle
- B. 3 chambers: right atrium, left atrium, and ventricle
- C. 4 chambers: two atria and two ventricles
- D. 5 chambers: two atria, two ventricles, and aorta
Answer: C. 4 chambers: two atria and two ventricles
The human heart has four chambers: right atrium, left atrium, right ventricle, and left ventricle, with the atria receiving blood and ventricles pumping it out.
The human heart has four chambers: right atrium, left atrium, right ventricle, and left ventricle, with the atria receiving blood and ventricles pumping it out.
A patient has blocked coronary arteries. What would be the direct consequence of this condition?
- A. The heart muscles would not receive adequate oxygen, potentially leading to a heart attack
- B. The brain would not receive enough blood supply
- C. Red blood cells would not be produced properly
- D. The kidneys would fail to filter waste products
Answer: A. The heart muscles would not receive adequate oxygen, potentially leading to a heart attack
Coronary arteries supply oxygen-rich blood to the heart muscle itself; blockage prevents adequate oxygenation of cardiac muscle tissue, risking heart attack.
Coronary arteries supply oxygen-rich blood to the heart muscle itself; blockage prevents adequate oxygenation of cardiac muscle tissue, risking heart attack.
During intense physical exercise, a person's heart rate increases significantly. This response involves multiple physiological mechanisms. Which sequence correctly describes what happens?
- A. Increased CO₂ and decreased O₂ in blood → stimulates respiratory and cardiac centers in medulla → increased heart rate and breathing
- B. Muscles demand more ATP → liver produces more glucose → heart rate decreases to conserve energy
- C. Adrenaline is released → blood vessels constrict uniformly → blood pressure drops → heart rate decreases
- D. Increased oxygen availability → reduced metabolic rate → slower cardiac output
Answer: A. Increased CO₂ and decreased O₂ in blood → stimulates respiratory and cardiac centers in medulla → increased heart rate and breathing
During exercise, muscles produce more CO₂ and consume more O₂, causing changes in blood chemistry that stimulate the medulla oblongata to increase heart rate and breathing rate via autonomic nervous system regulation.
During exercise, muscles produce more CO₂ and consume more O₂, causing changes in blood chemistry that stimulate the medulla oblongata to increase heart rate and breathing rate via autonomic nervous system regulation.