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med micro 22 ch12

QuestionAnswer
What are the defining characteristics of fungi? Vegitative structures, Life cycle, and Nutritional adaption,
Fungi are classified by what characteristic? Sexual spores- Life cycle
What is the difference between septate hyphae and coenocytic hyphae? eptate hyphae havee cross walls, called septa, dividing the hyphae into cellular units. Coenocytic hypae lack septa
How do fungi reproduce? Sexually and asexually
Name two asexual spores produced by fungi conidiospore and sporangiospore.
Conidiospores are produced in a chain at the end of what structure? A conidiophore.
A conidiospore formed by fragmentation of a septate hypha, into singular thickened cells are called....  Arthroconidia.
What is the name of conidiospore that consists of buds coming off a parent cell?  Blastoconidia.
What is the name of conidiospore that is a thick-walled spore formed by a round enlargement within a hyphal segment? Chlamydoconidium.
What is the name of the second type of asexual spore?  Sporangiospore
Within what structure is a sporangiospore formed? sporangium
Name the aerial hypha from which a sporangium is connected to Sporangiophore
What are the 3 phases of sexual spore reproduction? Plasmogamy, Karyogamy, and Meiosis.
Describe what happens in Plasmogamy.  A haploid nucleus of a donor cell penetrates the cytoplasm of a recipient cell.
Describe what happens in Karyogamy. The donor and recipient nuclei fuse to form a diploid zygote nucleus.
Describe what happens in Meiosis  The diploid nucleus gives rise to haploid nuclei (sexual spores) some of which may be genetic recombinants.
What are the characteristics of yeast?  nonfilamentous; unicellular fungi; shperical or oval; reproduce by budding
What is unique about dimorphic fungi?  They can grow as a mold or yeast. 37 degrees celcius it is yeast like, and 25 degrees celcius it is mold like.
How do fungi differ from bacteria? Fungi live in environments too acidic for bacteria, resistant to osmotic pressure, grow in high salt and sugar concentrations, require less nitrogen for growth, capable of metabolizing complex carbs.
Name the phylums of pathogenic fungi Zygomycota, ascomycota, anamorphs, basidiomycota
Define teleomorphs fungi that produce both sexual and asexual spores.
Define anamorphs fungi that produce asexual spores.
A fungal infection is defined as... mycosis
Define systemic mycoses fungal infections deep within the body
Define Subcutaneous mycoses Fungal infections beneath the skin caused by saprophytic fungi that live in soil and on vegitation.
Define dermatophytes Fungi that infect only the epidermis, skin, and nails.
Define Cutaneous mycoses  fungal infections caused by dermatophytes.
What are the characteristics of the phylum zygomycota conjugative fungi; produces sporangiospores and zygospores; coenocytic.
Describe the asexual life cyle of a zygomycota. An aerial hypha produces a sporangium that bursts and releases spores. Spores germinate to produce hypha, then vegitative mycelium grows.
Describe the sexual life cycle of a zygomycota. part 1 vegitative mycelium grows and produces gametes at tip of hypha, plasmogamy takes place, zygospore is a result,
Describe the sexual life cycle of a zygomycota. part 2 then the process of karyogamy and meiosis take place, zygote produces sporangium that bursts to release spore in order to germinate a new hyphae.
List the characteristics of the phylum Ascomycota  sac fungi, septate, telemorphic, produce ascospores and conidiospores
Give two examples of Ascomycota Aspergillus and Histoplasma capsulatum
Created by: xsavier1
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