Destruction of alveolar walls, loss of elasticity of alveoli, and impaired expiration in emphysema lead to which of the following?

A. Pallor is correct because anemia results in reduced red blood cell count or hemoglobin levels, which decreases the blood’s oxygen-carrying capacity. Pallor is most noticeable in areas where the skin is thin or highly vascularized, such as the face, conjunctiva, lips, nail beds, and mucous membranes. This is a classic and often early sign of anemia.

B. Fatigue is correct because tissues and organs receive less oxygen, which is necessary for cellular metabolism and energy production. The reduced oxygen delivery leads to muscle weakness, low endurance, and a persistent feeling of tiredness, even after rest. Fatigue is one of the most common and debilitating symptoms of anemia.

C. Dyspnea is correct because the body tries to compensate for the reduced oxygen-carrying capacity of the blood by increasing respiratory rate and depth. This can cause shortness of breath, especially during exertion or activity, as the lungs attempt to supply more oxygen to the tissues. Chronic anemia can also lead to exertional dyspnea at relatively low levels of activity.

D. Bradycardia is incorrect because anemia typically causes tachycardia, not bradycardia. The heart beats faster to maintain adequate oxygen delivery to vital organs when hemoglobin levels are low. Bradycardia would not be a compensatory response to anemia and may indicate a separate cardiac issue.

E. Dizziness is correct because the brain may receive insufficient oxygen, especially during sudden position changes or physical activity, leading to lightheadedness, vertigo, or fainting (syncope). Dizziness is a reflection of the central nervous system’s sensitivity to hypoxia caused by anemia.

A. Decreased kidney production of erythropoietin is correct because in end-stage renal failure, the kidneys lose their ability to produce adequate amounts of erythropoietin, a hormone that stimulates the bone marrow to produce red blood cells. Without sufficient erythropoietin, red blood cell production decreases, leading to anemia. This is one of the most common causes of anemia in chronic kidney disease.

B. Increased hemoglobin levels in the blood is incorrect because anemia is characterized by decreased hemoglobin levels, not increased. End-stage renal disease leads to reduced red blood cell production, which lowers hemoglobin levels.

C. Decreased red blood cell destruction is incorrect because decreased destruction would actually increase red blood cell count, not cause anemia. In renal failure, anemia is mainly due to decreased production, not reduced destruction.

D. Increased glomerular filtration in the kidneys is incorrect because end-stage renal failure is associated with a decreased glomerular filtration rate (GFR), not increased. Reduced filtration contributes to the accumulation of waste products but does not directly cause anemia in the way decreased erythropoietin does.