WGU D115 Unit 5 Questions and Answers 2023 (Verified
Answers)
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.
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.
explain why the nurse practitioner should ask the patient about her paresthesias
and ataxia.
Without the presence of intrinsic factor, vitamin B12 will not be absorbed effectively from
the gastrointestinal tract.
Describe what causes pernicious anemia.
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
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
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
Low temperature causes vasoconstriction, slowing blood flow, leading to RBC
deoxygenation, which triggers sickling.
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.
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.
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.
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.
Which three enzymes are released when the myocardial muscle is damaged?
Lactic acid dehydrogenase (LDH)
Creatine phosphokinase-myocardial band (CPK-MB)
Cardiac troponin I (cTnI)
Low-density lipoprotein (LDL)
Aspartate aminotransferase (AST)
Creatine phosphokinase-myocardial band (CPK-MB) and lactic acid dehydrogenase
(LDH) are biomarkers released by damaged myocardial cells. Cardiac troponin I (cTnI)
is the most specific indicator of myocardial infarction.
HTN is a risk factor for coronary atherosclerosis. What does it do to afterload?
It also increases afterload and causes ventricular hypertrophy, both of which increase
myocardial oxygen demand.
why it is important to determine if the patient has fainted recently or has blurred
vision.
Answers)
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.
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.
explain why the nurse practitioner should ask the patient about her paresthesias
and ataxia.
Without the presence of intrinsic factor, vitamin B12 will not be absorbed effectively from
the gastrointestinal tract.
Describe what causes pernicious anemia.
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
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
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
Low temperature causes vasoconstriction, slowing blood flow, leading to RBC
deoxygenation, which triggers sickling.
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.
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.
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.
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.
Which three enzymes are released when the myocardial muscle is damaged?
Lactic acid dehydrogenase (LDH)
Creatine phosphokinase-myocardial band (CPK-MB)
Cardiac troponin I (cTnI)
Low-density lipoprotein (LDL)
Aspartate aminotransferase (AST)
Creatine phosphokinase-myocardial band (CPK-MB) and lactic acid dehydrogenase
(LDH) are biomarkers released by damaged myocardial cells. Cardiac troponin I (cTnI)
is the most specific indicator of myocardial infarction.
HTN is a risk factor for coronary atherosclerosis. What does it do to afterload?
It also increases afterload and causes ventricular hypertrophy, both of which increase
myocardial oxygen demand.
why it is important to determine if the patient has fainted recently or has blurred
vision.
