Question 18 (1 point)
Ltien

Joe has type A-blood. Which of the following blood types can he safely receive blood from?

AB -

B -

O -

Question 19 (1 point)
Usten

Hemolytic disease of the newborn occurs when:

An Rh- mother has a first child who is Rht.

An Rh+ mother has a child with a man who is Rh .

An Rh-mother has a first child who is and then a second one who is also Rht.

An Rh+ mother has a first child who is Rh-and then a second one who is .

Ask by Mccoy Fitzgerald. in the United States

Mar 24,2025

Question

Question 18 (1 point)
Ltien

Joe has type A-blood. Which of the following blood types can he safely receive blood from?

AB -

B -

O -

Question 19 (1 point)
Usten

Hemolytic disease of the newborn occurs when:

An Rh- mother has a first child who is Rht.

An Rh+ mother has a child with a man who is Rh .

An Rh-mother has a first child who is and then a second one who is also Rht.

An Rh+ mother has a first child who is Rh-and then a second one who is .

Ask by Mccoy Fitzgerald. in the United States

Mar 24,2025

UpStudy AI · Accepted Answer

**Question 18**

Joe has type A blood, which means his red blood cells have the $$ \mathrm{A} $$ antigen and his plasma typically contains anti-$$ \mathrm{B} $$ antibodies. For a safe blood transfusion, he should receive blood from a donor that lacks the $$ \mathrm{B} $$ antigen. Additionally, considerations of the Rh factor are important. The universal donor blood is usually $$ \mathrm{O}- $$ because it has no $$ \mathrm{A} $$, $$ \mathrm{B} $$, or Rh antigens.

Among the given options:  
1) $$ \mathrm{A}+ $$ – Contains the $$ \mathrm{A} $$ antigen (okay) but may have Rh antigen which could be problematic if Joe is Rh–.  
2) $$ \mathrm{AB}- $$ – Contains both $$ \mathrm{A} $$ and $$ \mathrm{B} $$ antigens. The $$ \mathrm{B} $$ antigen is unacceptable for Joe.  
3) $$ \mathrm{B}- $$ – Contains the $$ \mathrm{B} $$ antigen and is therefore not compatible.  
4) $$ \mathrm{O}- $$ – Lacks $$ \mathrm{A} $$, $$ \mathrm{B} $$, and Rh antigens, making it safe for Joe.

Thus, Joe can safely receive blood from option 4, $$ \mathrm{O}- $$.

---

**Question 19**

Hemolytic disease of the newborn (HDN) is an immunological condition seen in subsequent pregnancies of an Rh– mother who becomes sensitized after carrying an Rh+ child. In the first pregnancy with an Rh+ child, the Rh– mother may develop IgG antibodies against the Rh antigen. In a later pregnancy with an Rh+ fetus, these antibodies can cross the placenta and destroy the fetal red blood cells.

Let’s analyze the options:

1) An Rh– mother has a first child who is $$ \mathrm{Rh}+ $$.  
 - Although the mother is sensitized during her first pregnancy, the first child is generally not affected by HDN because the sensitization occurs at the time of delivery.

2) An Rh+ mother has a child with a man who is Rh [incomplete].  
 - The scenario does not lead to HDN because the mother is Rh+ and thus does not produce antibodies against the Rh antigen.

3) An Rh– mother has a first child who is $$ \mathrm{Rh}+ $$ and then a second one who is also $$ \mathrm{Rh}+ $$.  
 - This is the typical scenario. The first Rh+ baby leads to maternal sensitization, and the second Rh+ fetus is at risk from the maternal IgG antibodies, resulting in HDN.

4) An Rh+ mother has a first child who is Rh– and then a second one who is $$ \mathrm{Rh}+ $$.  
 - Since the mother is Rh+, there is no risk of developing anti-Rh antibodies and no chance of HDN.

Thus, hemolytic disease of the newborn occurs in scenario 3.
**Question 18** Joe can safely receive blood from type O-. **Question 19** Hemolytic disease of the newborn occurs when an Rh- mother has a first child who is Rh+ and then a second child who is also Rh+.

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