Question

the nurse is talking with the twin brother of a patient with schizophrenia. the brother asks the nurse if schizophrenia is hereditary, related to birth defects, or caused by stress. what information should the nurse provide the patients brother regarding the pathology of the disease?

select all that apply.

the heritability of the disease is estimated to be 70-90%.
the disease is inherited from the mothers side of the family.
relatives of those with schizophrenia have no greater risk of developing the disease.
the development of schizophrenia has been linked to the labor and delivery phase of pregnancy.
there is evidence that both genetic vulnerability and stressful life events can trigger symptoms of schizophrenia.

Explanation:

Analyze genetic and heritability factors of schizophrenia

The heritability of schizophrenia is highly significant, with twin and family studies estimating it to be approximately 70% to 90%. It is a polygenic disorder, meaning it is not inherited solely from one parent's side (such as exclusively the mother's side), and relatives of individuals with schizophrenia have a significantly higher risk of developing the disease compared to the general population.

Analyze environmental and developmental risk factors

Schizophrenia development is linked to obstetric complications, including difficulties during the labor and delivery phase of pregnancy (e.g., hypoxia, birth complications). Additionally, the etiology is best explained by the diathesis-stress model, which posits that a combination of genetic vulnerability and environmental stressors triggers the onset of symptoms.

Evaluate the given options

• Option 1: True. Heritability is estimated to be 70-90%.
• Option 2: False. It is polygenic and not linked exclusively to maternal inheritance.
• Option 3: False. Relatives have a significantly higher risk.
• Option 4: True. Labor and delivery complications are linked to increased risk.
• Option 5: True. Both genetic vulnerability and stressful life events trigger symptoms.

Answer:

• The heritability of the disease is estimated to be 70-90%. (Correct answer)
• The disease is inherited from the mother's side of the family.
• Relatives of those with schizophrenia have no greater risk of developing the disease.
• The development of schizophrenia has been linked to the labor and delivery phase of pregnancy. (Correct answer)
• There is evidence that both genetic vulnerability and stressful life events can trigger symptoms of schizophrenia. (Correct answer)