WGU D115 Unit 5 Questions and Verified
Answers|100% Correct
Which two processes are involved in platelet activation?
Cyclooxygenase-1 (COX-1) inactivation
Aggregation
Adhesion - ANSWER-Platelet activation involves three linked processes: (1)
adhesion, (2) activation, and (3) aggregation. Platelet activation stimuli include
epinephrine, thrombin, and collagen.
Select four common causes of anemia from the list below.
Increased red cell destruction
Chronic blood loss
Severe bleeding
Impaired erythrocyte production
Blood transfusion - ANSWER-Impaired production of erythrocytes, increased red
cell destruction, severe bleeding, and chronic blood loss can cause anemia.
explain why the nurse practitioner should ask the patient about her paresthesias
and ataxia. - ANSWER-Without the presence of intrinsic factor, vitamin B12 will
not be absorbed effectively from the gastrointestinal tract.
Describe what causes pernicious anemia. - ANSWER-Pernicious anemia is
caused by vitamin B12 deficiency, which is often associated with the end stage of
type A chronic atrophic (autoimmune) gastritis. Autoimmune gastritis impairs the
production of IF, which is required for vitamin B12 uptake from the gut.
Select three possible causes of lymphadenopathy from the options below.
Inflammatory condition
Lipid storage disease
Neoplastic disease
Cardiac disease
, Peripheral vascular dysfunction - ANSWER-There are multiple causes of
lymphadenopathy. It may be caused by neoplastic disease, so all
lymphadenopathies must be closely followed and evaluated. Lymphadenopathy
may also be caused by an immunologic or inflammatory condition and by lipid
storage disease; this type of lymphadenopathy is usually widespread, including
the liver and spleen.
What is the most common cause of iron deficiency anemia (IDA) in children
during the first few years of life?
Dietary insufficiencies
Absorption problems
Blood loss
Increased iron requirement - ANSWER-Insufficient dietary iron is the most
common cause of IDA in children during the first few years of life.
Which stressor triggers sickling?
Increased plasma volume
Increased oxygen tension of the blood
Decreased plasma osmolality
Low temperature - ANSWER-Low temperature causes vasoconstriction, slowing
blood flow, leading to RBC deoxygenation, which triggers sickling.
cause of ITP - ANSWER-In 70% of ITP cases, there is an antecedent viral
disease that stimulates production of antiplatelet antibodies that bind to the
plasma membranes of platelets, causing platelet sequestration and destruction
by phagocytes in the spleen and other lymphoid tissues at a rate that exceeds
the ability of the bone marrow to produce them.
What is the likelihood that the patient will recover? with ITP - ANSWER-The
prognosis is excellent; 75% of children recover completely within three months.
By six months after onset, 80% of affected children have regained normal platelet
counts.
What is a function of the pericardial sac?
It provides protection to heart valves and heart chambers.
It provides a physical barrier that protects the heart against infection and
inflammation.
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