Interesting Human Heart Facts! Trivia Quiz

1. Which of the following statements is True :

The right ventricle is thicker than the left ventricle

The left ventricle is thicker than the right ventricle

The left and right ventricles have the same thickness

The left ventricle pump deoxygenated blood to the lungs

The left ventricle is thicker than the right ventricle because it needs to pump oxygenated blood to the rest of the body, while the right ventricle only needs to pump deoxygenated blood to the lungs. The left ventricle has a larger workload and therefore requires more muscle mass to generate the necessary force for efficient circulation.

Explanation

The left ventricle is thicker than the right ventricle because it needs to pump oxygenated blood to the rest of the body, while the right ventricle only needs to pump deoxygenated blood to the lungs. The left ventricle has a larger workload and therefore requires more muscle mass to generate the necessary force for efficient circulation.

2. The partial obstruction of a coronary artery is called :

Angina pectoris

Myocardial infarction

Necrosis

Heart attack

Angina pectoris is the correct answer because it refers to the partial obstruction of a coronary artery. This condition causes chest pain or discomfort due to reduced blood flow to the heart muscle. It is different from myocardial infarction, which is a complete blockage of a coronary artery leading to the death of heart muscle cells. Necrosis is a general term for cell death, and a heart attack is another term for myocardial infarction.

Explanation

Angina pectoris is the correct answer because it refers to the partial obstruction of a coronary artery. This condition causes chest pain or discomfort due to reduced blood flow to the heart muscle. It is different from myocardial infarction, which is a complete blockage of a coronary artery leading to the death of heart muscle cells. Necrosis is a general term for cell death, and a heart attack is another term for myocardial infarction.

3. The Moderator band is located in :

Right ventricle

Left ventricl

Both right and left ventricle

None of the above

The moderator band is a muscular structure located in the right ventricle of the heart. It is also known as the septomarginal trabecula and plays a role in the conduction of electrical signals within the heart. It helps to coordinate the contraction of the ventricles, ensuring efficient blood flow. Therefore, the correct answer is the right ventricle.

Explanation

The moderator band is a muscular structure located in the right ventricle of the heart. It is also known as the septomarginal trabecula and plays a role in the conduction of electrical signals within the heart. It helps to coordinate the contraction of the ventricles, ensuring efficient blood flow. Therefore, the correct answer is the right ventricle.

4. Which of the following forms the most of the posterior surface of the heart (base) :

Right atrium

Right ventricle

Left atrium

Left ventricle

The left atrium forms most of the posterior surface of the heart (base) because it is located towards the back of the heart and is the chamber that receives oxygenated blood from the lungs. It is positioned behind the right atrium and ventricle, and the left ventricle is located more towards the front of the heart. Therefore, the left atrium contributes the most to the posterior surface of the heart.

Explanation

The left atrium forms most of the posterior surface of the heart (base) because it is located towards the back of the heart and is the chamber that receives oxygenated blood from the lungs. It is positioned behind the right atrium and ventricle, and the left ventricle is located more towards the front of the heart. Therefore, the left atrium contributes the most to the posterior surface of the heart.

5. The posterior interventricular artery is mostly branched from :

Arch of the aorta

Left coronary artery

Right coronary artery

None of the above

The posterior interventricular artery is mostly branched from the right coronary artery. The right coronary artery is one of the main arteries that supplies blood to the heart. It originates from the aorta and travels along the surface of the heart, branching into various smaller arteries. One of these branches is the posterior interventricular artery, which runs along the back of the heart and supplies blood to the posterior part of the ventricles. Therefore, the correct answer is the right coronary artery.

Explanation

The posterior interventricular artery is mostly branched from the right coronary artery. The right coronary artery is one of the main arteries that supplies blood to the heart. It originates from the aorta and travels along the surface of the heart, branching into various smaller arteries. One of these branches is the posterior interventricular artery, which runs along the back of the heart and supplies blood to the posterior part of the ventricles. Therefore, the correct answer is the right coronary artery.

6. The Parasympathetic Nervous System :

Inhibit the GIT and the heart

Stimulate the GIT and the heart

Inhibit the GIT but stimulate the heart

Stimulate the GIT but inhibit the heart

The parasympathetic nervous system stimulates the gastrointestinal tract (GIT) by increasing digestive secretions, promoting peristalsis, and increasing blood flow to the digestive organs. However, it inhibits the heart by decreasing heart rate and reducing the force of contractions. This allows the body to conserve energy and focus on digestion and rest.

Explanation

The parasympathetic nervous system stimulates the gastrointestinal tract (GIT) by increasing digestive secretions, promoting peristalsis, and increasing blood flow to the digestive organs. However, it inhibits the heart by decreasing heart rate and reducing the force of contractions. This allows the body to conserve energy and focus on digestion and rest.