Health & Illness - Chapter 9 Questions With Complete
Solutions
1. A father and mother are carriers of phenylketonuria (PKU).
Their 2-year-old daughter has PKU. The couple tells the nurse
that they are planning to have a second baby. Because their
daughter has PKU, they are sure that their next baby won't be
affected. What information will the nurse use to formulate a
response?
a. The odds of having another baby with PKU are very slim.
b. Each baby has a 50% chance of being affected.
c. Males are not affected by PKU.
d. The parents are both carriers so each baby has a 25% chance
of being affected. Correct Answers ANS: D
The chance is one in four that each child produced by this
couple will be affected by PKU disorder. This couple still has an
increased likelihood of having a child with PKU. Having one
child already with PKU does not guarantee that they will not
have another. No correlation exists between gender and
inheritance of the disorder, because PKU is an autosomal
recessive disorder.
1. Which are known to delay fetal lung maturity? Select all that
apply. Express answer in small letters, followed by a comma and
a space—e.g., a, b, c.
a.
Maternal hypertension
,b.
Gestational diabetes
c.
Chronic glomerulonephritis
d.
Infection
e.
Maternal corticosteroid use
f.
Epilepsy Correct Answers ANS: B, C
Gestational diabetes and chronic glomerulonephritis can delay
fetal lung maturity. Certain maternal conditions that cause
decreased maternal placental blood flow, such as maternal
hypertension, placental dysfunction, infection, or corticosteroid
use, accelerate lung maturity.
2. The nurse is providing genetic counselling for an expectant
couple who already have a child with trisomy 18. What should
the nurse do?
a.Tell the couple they need to terminate the pregnancy within 2
to 3 weeks.
b. Explain that the fetus has a 50% chance of having the
disorder.
c.Discuss options, including amniocentesis, to determine
whether the fetus is affected.
d.Refer the couple to a psychologist for emotional support.
Correct Answers ANS: C
, Genetic testing, including amniocentesis, would need to be
performed to determine whether the fetus is affected. The couple
should be given information about the likelihood of having
another baby with this disorder so that they can make an
informed decision. A genetic counsellor is the best source for
determining genetic probability ratios. The couple eventually
may need emotional support, but the status of the pregnancy
must be determined first.
2. Which are autosomal dominant disorders?
a.
Myotonic dystrophy
b.
PKU
c.
Marfan syndrome
d.
Dwarfism
e.
Maple syrup urine disease
f.
Cystic fibrosis Correct Answers ANS: A, C, D
Examples of autosomal dominant disorders are Marfan
syndrome, neurofibromatosis, myotonic dystrophy, Stickler
syndrome, Treacher Collins syndrome, and achondroplasia
(dwarfism).
3. The nurse is assessing the knowledge of new parents with a
child born with maple syrup urine disease (MSUD). Which is
accurate related to MSUD?
Solutions
1. A father and mother are carriers of phenylketonuria (PKU).
Their 2-year-old daughter has PKU. The couple tells the nurse
that they are planning to have a second baby. Because their
daughter has PKU, they are sure that their next baby won't be
affected. What information will the nurse use to formulate a
response?
a. The odds of having another baby with PKU are very slim.
b. Each baby has a 50% chance of being affected.
c. Males are not affected by PKU.
d. The parents are both carriers so each baby has a 25% chance
of being affected. Correct Answers ANS: D
The chance is one in four that each child produced by this
couple will be affected by PKU disorder. This couple still has an
increased likelihood of having a child with PKU. Having one
child already with PKU does not guarantee that they will not
have another. No correlation exists between gender and
inheritance of the disorder, because PKU is an autosomal
recessive disorder.
1. Which are known to delay fetal lung maturity? Select all that
apply. Express answer in small letters, followed by a comma and
a space—e.g., a, b, c.
a.
Maternal hypertension
,b.
Gestational diabetes
c.
Chronic glomerulonephritis
d.
Infection
e.
Maternal corticosteroid use
f.
Epilepsy Correct Answers ANS: B, C
Gestational diabetes and chronic glomerulonephritis can delay
fetal lung maturity. Certain maternal conditions that cause
decreased maternal placental blood flow, such as maternal
hypertension, placental dysfunction, infection, or corticosteroid
use, accelerate lung maturity.
2. The nurse is providing genetic counselling for an expectant
couple who already have a child with trisomy 18. What should
the nurse do?
a.Tell the couple they need to terminate the pregnancy within 2
to 3 weeks.
b. Explain that the fetus has a 50% chance of having the
disorder.
c.Discuss options, including amniocentesis, to determine
whether the fetus is affected.
d.Refer the couple to a psychologist for emotional support.
Correct Answers ANS: C
, Genetic testing, including amniocentesis, would need to be
performed to determine whether the fetus is affected. The couple
should be given information about the likelihood of having
another baby with this disorder so that they can make an
informed decision. A genetic counsellor is the best source for
determining genetic probability ratios. The couple eventually
may need emotional support, but the status of the pregnancy
must be determined first.
2. Which are autosomal dominant disorders?
a.
Myotonic dystrophy
b.
PKU
c.
Marfan syndrome
d.
Dwarfism
e.
Maple syrup urine disease
f.
Cystic fibrosis Correct Answers ANS: A, C, D
Examples of autosomal dominant disorders are Marfan
syndrome, neurofibromatosis, myotonic dystrophy, Stickler
syndrome, Treacher Collins syndrome, and achondroplasia
(dwarfism).
3. The nurse is assessing the knowledge of new parents with a
child born with maple syrup urine disease (MSUD). Which is
accurate related to MSUD?
