Question 18 (1 point) Which of the following hypersensitivity reaction does not

Question

Question 18 (1 point) Which of the following hypersensitivity reaction does not involve antibody? O 1) Type IV hypersensitivity 0 2) Type II hypersensitivity 3) Type I hypersensitivity 4) Type Ill hypersensitivity Save 15 Question 19 (1 point) 20 Which of the following is true for natural killer cells? O 1) Kiling of cells is stimulated by Prostaglandin E2. 2) They recognize and kill virus infected cells 3) Killing of cells by NK cells requires interaction with B cells. 4) They may phagocytose tumor cells. 5) IL-2 supports their growth and interferons promote their killing activity.

Explanation / Answer

Answer:

18). 1). Type IV hypersensitivity

Explanation:

Type IV hypersensitivity is Cell-mediated reactions thus do not involve antibodies.

19). 2). They recognize and kill virus infected cells.

Explanation:

Natural killer (NK) cells act as an early defense line against viruses because of their ability to kill virus-infected cells as well as a variety of tumor cells.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.