What describes the pathologic changes of sickle cell anemia?
a. Sickle-shaped cells carry excess oxygen.
b. Sickle-shaped cells decrease blood viscosity.
c. Increased red blood cell destruction occurs.
d. Decreased red blood cell destruction occurs.
C
Feedback
A Sickled red cells have decreased oxygen-carrying capacity and transform into the
sickle shape in conditions of low oxygen tension.
B When the sickle cells change shape, they increase the viscosity in the area where
they are involved in the microcirculation.
C The clinical features of sickle cell anemia are primarily the result of increased
red blood cell destruction and obstruction caused by the sickle-shaped red blood
cells.
D Increased red blood cell destruction occurs.
You might also like to view...
Those who cope less effectively may exhibit which of the following? (Select all that apply.)
a. Avoids avoidance c. Is demanding b. Confronts reality d. Is rigid
Which action is most likely to undermine the political power of a nursing department?
1. The nurse executive reports on the accomplishments of the nursing staff at each board meeting. 2. The nurses in the hospital often ask for and do favors for one another. 3. The nurse manager wears a business suit to meetings. 4. The nurse executive does more talking than listening in meetings.
A patient with a history of emphysema, diabetes, and hyperlipidemia is in the critical care unit on a ventilator. The nutrition assessment notes that the patient has a protein and vitamin deficiency and is underweight
Which formula for nutritional assessment is most appropriate? a. Elemental protein formula b. Fiber-added formula c. High medium–chain triglyceride formula d. Lactose-free formula
A patient has microcytic hypochromic anemia. Which of the following pathogenic mechanisms may cause anemia in this patient? (select all that apply)
a. Decreased erythrocyte life span b. Failure of mechanisms of compensatory erythropoiesis c. Disturbances of the iron cycle d. Increased basal metabolic rate e. Swelling in the tissues