Question

1. a pulmonary infarction actually means:

○ pulmonary incompetence
○ slowed blood flow
○ lung blood flow blockage
○ pulmonary valve stenosis

1. the term _______ refers to the lack of development of normal numbers of erythrocytes in the blood.

○ sickle cell anemia
○ iron deficiency anemia
○ aplastic anemia
○ sideroblastic anemia

Explanation:

Question 52

• Pulmonary incompetence relates to valve function, not infarction.
• Slowed blood flow is not the definition of infarction (which is blockage - induced tissue death).
• Pulmonary infarction occurs when blood flow to the lung is blocked (e.g., by an embolus), leading to tissue death.
• Pulmonary valve stenosis is a valve narrowing, not infarction. So the correct option is the one about lung blood flow blockage.

• Sickle Cell Anemia is about abnormal red blood cell shape.
• Iron Deficiency Anemia is due to iron lack for hemoglobin.
• Aplastic Anemia is characterized by the bone marrow not producing enough red blood cells (lack of development of normal erythrocyte numbers).
• Sideroblastic Anemia involves abnormal iron utilization in red blood cell production. So the correct term is Aplastic Anemia.

Answer:

lung blood flow blockage (the option with this text)

Question 53