The spleen:
Resembles a large lymph node divided into lobules.
Produces T lymphocytes.
Filters lymph.
Consists of two lobes and is located in the mediastinum.
The Correct Answer is A
It is a major component of the lymphatic system and contains T and B lymphocytes.
Choice B is wrong because the spleen does not produce T lymphocytes, but rather stores them.
T lymphocytes are produced in the thymus.
Choice C is wrong because the spleen does not filter lymph, but rather blood. It traps bloodborne microbes and produces an immune response to them.
Choice D is wrong because the spleen consists of one lobe and is located in the upper left abdomen below the diaphragm.
The description in choice D matches the thymus, not the spleen.
The normal size of the spleen in adults is about 12 cm long, 8 cm broad, and 3-4 cm thick, weighing about 200 g.
The normal range of splenic index (the product of length, width, and thickness) is 120-480 cm.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Circulation is the movement or flow of something, especially blood or air, through a circuit or a specific course.
Circulation supplies oxygen and nutrients to and removes wastes from tissues. This is essential for the survival and functioning of cells and organs.
Choice A is wrong because circulation does not inflate the lungs.
The lungs are inflated by the pressure difference between the air inside and outside the chest cavity.
Choice C is wrong because circulation does not deliver waste to tissues.
Circulation removes wastes from tissues and delivers them to the excretory organs such as the kidneys and the lungs.
Choice D is wrong because circulation does not deliver carbon dioxide to tissues and removes excess oxygen.
Circulation does the opposite: it delivers oxygen to tissues and removes carbon dioxide.
Carbon dioxide is a waste product of cellular respiration that needs to be eliminated from the body.
Correct Answer is B
Explanation
Persons with type AB blood are sometimes called universal recipients, not donors. This means they can safely receive a blood transfusion using any other blood type. Choice A is wrong because it confuses type AB blood with type O negative blood.
Type O negative blood is considered the universal donor type because it has no antigens on the surface of red blood cells and can be given to people of any blood type.
Type AB-positive blood is also considered the universal plasma donor type because it has both A and B antigens and can be given to patients with any blood type.
Plasma is the liquid part of blood that carries cells and proteins throughout the body.
The presence or absence of antigens and the Rh factor determine how a person’s immune system reacts to a blood transfusion or organ transplant.
Antigens are substances that can trigger an immune response if they are foreign to the body.
The Rh factor is a protein that can be either present (+) or absent (-) on the surface of red blood cells.
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