객관식
Which of the following is not a way that type II hypersensitivity can cause tissue damage?
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27. Immunological Disorders
Type II Hypersensitivities
객관식
A patient with type A+ blood is in the emergency room & requires a blood transfusion. Which of the following types of blood could they receive?
I) Type O+
II) Type A–
III) Type B+
IV) Type AB–
A
I or II only.
B
I or III only.
C
II or IV only.
D
I, II, or III.
E
II, III or IV.
F
I, II or IV.
검증된 단계별 안내1
Step 1: Understand the blood group compatibility rules. A patient with type A+ blood has A antigens on their red blood cells and the Rh factor (positive). They naturally have anti-B antibodies in their plasma, which will attack any B antigens.
Step 2: Determine which blood types lack B antigens to avoid immune reaction. Blood types that have B antigens (type B and type AB) are generally not compatible with a type A recipient because of the anti-B antibodies.
Step 3: Consider the Rh factor compatibility. Since the patient is Rh positive (A+), they can receive blood from both Rh positive and Rh negative donors without risk of anti-Rh antibody reaction.
Step 4: Analyze each option:
- Type O+ has no A or B antigens and is Rh positive, so it is compatible.
- Type A– has A antigens and is Rh negative, which is compatible.
- Type B+ has B antigens, which will be attacked by anti-B antibodies, so it is not compatible.
- Type AB– has both A and B antigens, so the B antigen will cause a reaction, making it incompatible.
Step 5: Conclude that the patient can safely receive blood from types I (O+) and II (A–) only, because these do not have B antigens and are compatible with the Rh factor.
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