Biology / Unit 9 Bio 1929 short lesson, about 20 seconds
Animal Virus Entry and Exit
Captions available
The idea
Animal viruses enter cells by endocytosis or fusion, then exit either by budding, which spares the cell, or by lysis, which kills it.
In practice
Influenza buds from its host's membrane without killing it, while non-enveloped rhinoviruses accumulate until the cell lyses.
Where people slip
Budding does not mean a cell is undamaged — a virus can impair normal function while keeping the cell alive.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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