Exam 1 Part 5 Flashcards
(54 cards)
What are the 3 eukaryotic microbes of clinical interest?
protozoa, fungi, and parasitic helminths
T/F: Eukaryotes can reproduce either sexually or asexually. Some even do both.
True
T/F: Protozoa typically lack a cell wall.
True
T/F: Most protozoa are pathogens
False; very few are
What kind of environment is required by protozoa?
moist environments
How do most protozoa reproduce?
asexually
T/F: all protozoa produce trophozoites.
true
T/F: all protozoa produce cysts
false; some do, but not all
What do protozoa have that protect them from osmotic lysis?
contractile vacuoles
T/F: 30% of fungi cause diseases of plants, animals and humans (mycoses)
True
What is the name given to the nonreproductive body of fungi?
thallus
What long, branched, tubular filaments compose the thalli of molds?
hyphae
What is the term applied to fungi that produce two types of thalli?
dimorphic
What form of dimorphic fungi generally cause diseases?
yeast form
What is the term for a tangled mass of hyphae (typically subterranean)?
mycelium
T/F: all fungi have the ability to reproduce asexually.
True
T/F: all fungi have the ability to reproduce sexually.
false, but most do.
What is a pseudohypha?
a series of buds that remain attached to one another and to parent cell
AIDS, common colds, hemorrhagic fevers, SARS, and smallpox are all caused by what type of pathogen?
viruses
T/F: viruses can have either DNA or RNA.
True
What is the name for the protein coat surrounding the nucleic acid core of viruses?
capsid
What outer structure do viruses have that encloses the nucelocapsids?
envelope
Other than protection, what other function is provided by capsids and envelopes of viruses?
means of attachment to host’s cells
When is the capsid of a virus removed?
once the virus is inside the host