Hemolytic disease of the newborn (HDN) can occur if the
mother:
Student
Answer:
Is Rh-positive and the fetus is Rh-negative
Is Rh-negative and the
... [Show More] fetus is Rh-positive
Has type A blood and the fetus has type O
Has type AB blood and the fetus has type B
Instructor
Explanation:
HDN can occur only if antigens on fetal erythrocytes differ from antigens on
maternal erythrocytes. Maternal-fetal incompatibility exists only if the
mother and fetus differ in ABO blood type or if the fetus is Rh-positive and
the mother is Rh-negative. This erythrocyte incompatibility does not exist in
any of the other options.
Points Received: 2 of 2
Comments:
Question 2. Question :
Examination of the throat in a child demonstrating signs and
symptoms of acute epiglottitis may contribute to which lifethreatening complication?
Student
Answer:
Retropharyngeal abscess
Laryngospasms
Rupturing of the tonsils
Gagging induced aspiration
Instructor
Explanation:
Examination of the throat may trigger laryngospasm and cause respiratory
collapse. Death may occur in a few hours. This selection is the only option
that accurately identifies the life-threatening complication that can result from
-589875941 MultipleChoice 68 True
0 -589875941 MultipleChoice 68
an examination of the throat of a child who demonstrates the signs and
symptoms of acute epiglottitis.
Points Received: 2 of 2
Comments:
Question 3. Question :
If the sinoatrial (SA) node fails, then at what rate (depolarizations
per minute) can the atrioventricular (AV) node depolarize?
Student
Answer:
60 to 70
40 to 60
30 to 40
10 to 20
Instructor
Explanation:
If the SA node is damaged, then the AV node will become the heart’s
pacemaker at a rate of approximately 40 to 60 spontaneous depolarizations per
minute.
Points Received: 2 of 2
Comments:
Question 4. Question :
What is the ratio of coronary capillaries to cardiac muscle cells?
Student
Answer:
1:1 (one capillary per one muscle cell)
1:2 (one capillary per two muscle cells)
1:4 (one capillary per four muscle cells) [Show Less]