Open Question
If the following are placed in the order of occurrence, which would be the third step?
a. diapedesis
b. digestion
c. formation of a phagosome
d. formation of a phagolysosome
e. margination
19. Innate Immunity
Phagoctytosis
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Which of the following statements about phagosomes and phagolysosomes are true?
A
Phagosomes are vesicles surrounding an engulfed microbe.
B
Phagosomes can be found in neutrophils, macrophages, and T cells.
C
Phagolysosomes destroy the engulfed microbe with digestive enzymes.
D
Phagolysosomes are the fusion of a phagosome and a lysosome.
E
A and C.
F
B and D.
G
A, C, and D.
H
All of the above.
Verified step by step guidance1
Understand the role of phagosomes: Phagosomes are vesicles that form around a microbe when it is engulfed by a phagocytic cell, such as a neutrophil or macrophage. This is a key part of the immune response.
Identify the cells involved: Phagosomes are typically found in phagocytic cells like neutrophils and macrophages. T cells are not phagocytic and do not form phagosomes.
Learn about phagolysosomes: Phagolysosomes are formed when a phagosome fuses with a lysosome. This fusion allows digestive enzymes from the lysosome to enter the phagosome and break down the engulfed microbe.
Evaluate the statements: Based on the definitions, statement A (Phagosomes are vesicles surrounding an engulfed microbe) and statement C (Phagolysosomes destroy the engulfed microbe with digestive enzymes) are true. Statement D (Phagolysosomes are the fusion of a phagosome and a lysosome) is also true.
Determine the correct answer: Since statements A, C, and D are true, the correct answer is A, C, and D.
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