How does an antigen stimulate an immune response?

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Basic Immune System Quizlet Questions

Question 1 of 5

How does an antigen stimulate an immune response?

A. It is captured, processed, and presented to a lymphocyte by a macrophage. B. It circulates in the blood, where it comes in contact with circulating lymphocytes. C. It is a foreign protein that has antigenic determinants different from those of the body. D. It combines with larger molecules that are capable of stimulating production of antibodies.

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

Before the patient receives a kidney transplant, a crossmatch test is ordered. What does a positive crossmatch indicate?

A. Matches tissue types for a successful transplantation B. Determines paternity and predicts risk for certain diseases C. Establishes racial background and predicts risk for certain diseases D. Cytotoxic antibodies to the donor contraindicate transplanting this donor’s organ

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

A 78-year-old patient has developed Haemophilus influenzae. In addition to standard precautions, what should the nurse use to protect herself and other patients when working within 3 feet of the patient?

A. Mask B. Gown C. Gloves D. Shoe covers

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

A patient comes to the clinic and requests testing for HIV infection. Before administering testing, what is most important for the nurse to do?

A. Ask the patient to identify all sexual partners B. Determine when the patient thinks exposure to HIV occurred C. Explain that all test results must be repeated at least twice to be valid D. Discuss prevention practices to prevent transmission of the HIV to others

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

What does the presence of carcinoembryonic antigens (CEAs) and α-fetoprotein (AFP) on cell membranes indicate has happened to the cells?

A. They have shifted to more immature metabolic pathways and functions B. They have spread from areas of original development to different body tissues C. They produce abnormal toxins or chemicals that indicate abnormal cellular function D. They have become more differentiated as a result of repression of embryonic functions

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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