Question 18 (1 point)
Lliten

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

At

AB

B -

0

Question 19 (1 point)
Listen

Hemolytic disease of the newborn occurs when:

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

An Rht mother has a child with a man who is Rh:.

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

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

Question

Question 18 (1 point)
Lliten

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

At
AB
B -
0

Question 19 (1 point)
Listen

Hemolytic disease of the newborn occurs when:

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

UpStudy AI · Accepted Answer

**Question 18**

Joe has type A blood. For blood transfusions, the donor blood must not have antigens that would be attacked by the recipient’s antibodies. A person with type A blood will have anti-B antibodies, so they can safely receive blood that does not have B antigens.

- Type A blood has the A antigen.
- Type AB blood has both A and B antigens, so the B antigen may react with Joe’s anti-B antibodies.
- Type B blood has the B antigen.
- Type O blood has no A or B antigens, making it acceptable for donation.

Thus, Joe can safely receive blood from type O donors.

$$
\text{Answer: Option 4 (0)}
$$

---

**Question 19**

Hemolytic disease of the newborn (HDN) is most commonly the result of an Rh incompatibility. The situation occurs when an Rh-negative ($$\text{Rh}^-$$) mother carries an Rh-positive ($$\text{Rh}^+$$) fetus. The first pregnancy usually sensitizes the mother (she develops antibodies against the Rh antigen during delivery), and in subsequent pregnancies with an Rh-positive fetus, these antibodies cross the placenta and cause hemolysis of fetal red blood cells.

- In option 1, an $$\text{Rh}^-$$ mother with a first $$\text{Rh}^+$$ child may be sensitized, but the first child usually is not affected.
- In option 3, an $$\text{Rh}^-$$ mother has a first child who is $$\text{Rh}^+$$ (which leads to sensitization), and then a second child who is also $$\text{Rh}^+$$. In the second pregnancy, the maternal antibodies attack the fetal red blood cells, causing HDN.
- Options 2 and 4 do not describe the typical scenario for HDN.

Thus, hemolytic disease of the newborn occurs in the situation described in option 3.

$$
\text{Answer: Option 3}
$$
**Question 18** Joe has type A blood. He can safely receive blood from type O donors. **Answer: Option 4 (0)** --- **Question 19** Hemolytic disease of the newborn occurs when an Rh-negative mother has a first child who is Rh-positive and then a second child who is also Rh-positive. **Answer: Option 3**

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