BIOL 2020U Lecture Notes - Asexual Reproduction, Antigen, Mutation Rate
Document Summary
Parasites (endo-) or (ecto-) feed on living organisms while causing harm. They gain benefits from them (e. g. unlimited supply of nutrients, h2o, constant temp) Can be bacteria, protoctists, viruses, fungi, arthropods, platyhelminthes. If the human is infected with the malarial parasite, the mosquito takes up. Plasmodium gametes in the blood on which the mosquito feeds. Asexual reproduction phase: occurs in human liver and red blood cells, produces enormous quantities of parasites, merozoite stage. Sexual phase: occurs in the female mosquito. [exam] lives inside the liver and red blood cells: survive for long periods because it is protected from the immune system. Surface antigen changes rapidly: has no (need for) locomotory structures because. No need to move to find food: has no (need for) mechanism for regulating its water content because cytoplasm has same water potential as blood cell.
