WGU D115 Unit 5
Study online at https://quizlet.com/_k34pfr
1. Which two processes are involved in platelet activation?
Cyclooxygenase-1 (COX-1) inactivation
Aggregation
Adhesion: Platelet activation involves three linked processes: (1) adhesion, (2) activation, and (3) aggregation.
Platelet activation stimuli include epinephrine, thrombin, and collagen.
2. Select four common causes of anemia from the list below.
Increased red cell destruction
Chronic blood loss
Severe bleeding
Impaired erythrocyte production
Blood transfusion: Impaired production of erythrocytes, increased red cell destruction, severe bleeding, and
chronic blood loss can cause anemia.
3. explain why the nurse practitioner should ask the patient about her pares-
thesias and ataxia.: Without the presence of intrinsic factor, vitamin B12 will not be absorbed effectively
from the gastrointestinal tract.
4. Describe what causes pernicious anemia.: Pernicious anemia is caused by vitamin B12 defi-
ciency, 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.
5. Select three possible causes of lymphadenopathy from the options below.
Inflammatory condition
Lipid storage disease
Neoplastic disease
Cardiac disease
Peripheral vascular dysfunction: 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.
6. 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
1/8
, WGU D115 Unit 5
Study online at https://quizlet.com/_k34pfr
Increased iron requirement: Insufficient dietary iron is the most common cause of IDA in children
during the first few years of life.
7. Which stressor triggers sickling?
Increased plasma volume
Increased oxygen tension of the blood
Decreased plasma osmolality
Low temperature: Low temperature causes vasoconstriction, slowing blood flow, leading to RBC deoxygena-
tion, which triggers sickling.
8. cause of ITP: 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.
9. What is the likelihood that the patient will recover? with ITP: 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.
10. 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.
It forms a lining that is continuous with the arteries, veins, and capillaries of
the body.
It creates a continuous closed circulatory system.: The pericardial sac provides a physical
barrier that protects the heart against infection and inflammation. It also protects the heart during gravitational
acceleration and deceleration.
11. Which factors determine cardiac output?
Parasympathetic and sympathetic activity
Heart rate and stroke volume
Right and left atrial pressure
Preload and afterload
Previousquestion: Cardiac output is the product of heart rate multiplied by stroke volume.
12. Which three enzymes are released when the myocardial muscle is dam-
aged?
2/8
Study online at https://quizlet.com/_k34pfr
1. Which two processes are involved in platelet activation?
Cyclooxygenase-1 (COX-1) inactivation
Aggregation
Adhesion: Platelet activation involves three linked processes: (1) adhesion, (2) activation, and (3) aggregation.
Platelet activation stimuli include epinephrine, thrombin, and collagen.
2. Select four common causes of anemia from the list below.
Increased red cell destruction
Chronic blood loss
Severe bleeding
Impaired erythrocyte production
Blood transfusion: Impaired production of erythrocytes, increased red cell destruction, severe bleeding, and
chronic blood loss can cause anemia.
3. explain why the nurse practitioner should ask the patient about her pares-
thesias and ataxia.: Without the presence of intrinsic factor, vitamin B12 will not be absorbed effectively
from the gastrointestinal tract.
4. Describe what causes pernicious anemia.: Pernicious anemia is caused by vitamin B12 defi-
ciency, 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.
5. Select three possible causes of lymphadenopathy from the options below.
Inflammatory condition
Lipid storage disease
Neoplastic disease
Cardiac disease
Peripheral vascular dysfunction: 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.
6. 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
1/8
, WGU D115 Unit 5
Study online at https://quizlet.com/_k34pfr
Increased iron requirement: Insufficient dietary iron is the most common cause of IDA in children
during the first few years of life.
7. Which stressor triggers sickling?
Increased plasma volume
Increased oxygen tension of the blood
Decreased plasma osmolality
Low temperature: Low temperature causes vasoconstriction, slowing blood flow, leading to RBC deoxygena-
tion, which triggers sickling.
8. cause of ITP: 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.
9. What is the likelihood that the patient will recover? with ITP: 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.
10. 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.
It forms a lining that is continuous with the arteries, veins, and capillaries of
the body.
It creates a continuous closed circulatory system.: The pericardial sac provides a physical
barrier that protects the heart against infection and inflammation. It also protects the heart during gravitational
acceleration and deceleration.
11. Which factors determine cardiac output?
Parasympathetic and sympathetic activity
Heart rate and stroke volume
Right and left atrial pressure
Preload and afterload
Previousquestion: Cardiac output is the product of heart rate multiplied by stroke volume.
12. Which three enzymes are released when the myocardial muscle is dam-
aged?
2/8
