Question

topic 2: cell physiology & tissues
9
complete each statement by selecting the correct word or phrase from each drop - down.

1. a wandering click to select encounters a bacterium.
2. extending outwards from the macrophage, click to select are formed to encircle the bacterium.
3. when completely surrounded, the bacterium is brought inside the cell membrane and forms a click to select.
4. lysosomes fuse with the phagosome to form a click to select.
5. enzymes from the click to select degrade and digest the bacterium.
6. the click to select now moves back to the cell membrane where it fuses once again.
7. release of the digested bacterium indicates the excretion of waste products via click to select.

Explanation:

1. Macrophages are immune - cells that can wander and encounter bacteria.
2. Pseudopods are extensions from macrophages that encircle bacteria.
3. When the bacteria is surrounded, a phagosome is formed.
4. Lysosomes fuse with phagosome to form phagolysosome.
5. Enzymes from lysosomes digest the bacteria.
6. The vesicle (containing waste) moves back to the cell - membrane.
7. Excretion of waste products occurs via exocytosis.

Answer:

1. macrophage
2. pseudopods
3. phagosome
4. phagolysosome
5. lysosome
6. vesicle
7. exocytosis