The red blood cells of type AB blood have on their surfaces:
Antigen B only.
Neither antigens A nor B
Antigen A only.
Antigens A and B
The Correct Answer is D
This is because blood type AB has both A and B antigens on the surface of red blood cells.
Antigens are protein molecules that can trigger an immune response if they are foreign to the body.
Choice A is wrong because antigen B only is present in blood type B.
Choice B is wrong because neither antigens A nor B are present in blood type O.
Choice C is wrong because antigen A only is present in blood type A.
Normal ranges for blood types vary by population, but according to the NHS, about 3% of people in the UK have blood type AB.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small intestines.
The lacteals merge to form larger lymphatic vessels that transport chyle (a milky fluid containing fat and lymph) to the thoracic duct where it is emptied into the bloodstream at the subclavian vein.
Choice A is wrong because it is the opposite of the true statement.
Lacteals are not false, they are real structures that play an important role in fat absorption and transport.
Correct Answer is A
Explanation
Capillary walls consist of a single layer of epithelial cells, and they exchange substances in the blood for substances in the tissue fluid surrounding body cells.
This single layer of cells is called the endothelium and it forms the barrier between the blood and the interstitial fluid.
The endothelium can be either continuous or fenestrated, depending on the tissue type and function.
The capillaries are very thin and allow red blood cells to flow through them single file.
The capillaries also have a layer of a glycoprotein called the glycocalyx that covers their luminal surface.
Choice B. False is wrong because it contradicts the definition and structure of capillaries.
Capillaries are not made of multiple layers of cells, nor do they prevent the exchange of substances between the blood and the tissue fluid.
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