AALAS Laboratory Animal Technician (LAT) Practice Test

What does a B cell defect result in?

Hairlessness Lack of Spleen Lack of an antibody response Wasting Disease

Correct Answer:

Lack of an antibody response

Explanation:

B cells are the part of the immune system that produces antibodies, the proteins that recognize and neutralize pathogens. When B cells don’t function properly, the body can’t mount an adequate antibody response to infections or vaccines, leading to little or no antibody production. That’s why the correct answer is a lack of an antibody response. The other options don’t reflect how B cells work: hairlessness isn’t caused by B cell function, absence of the spleen is a structural issue unrelated to antibody production, and wasting disease is a general condition not specifically tied to B cell defects.

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