TMA4/BIO411

TMA Quiz Questions TMA: TMA4/BIO411 Matric Number:  SCORE=9.00 BIO411 - Parasitology Dr. Olaniyi Omolara (oolaniyi@noun.edu.ng ) 1 Phylum Acanthocephala consists of parasitic worms known as the following except acanthocephales spiny-headed worms thin worms thorny-headed worms 2 What do worms in the phylum Acanthocephala use to pierce and hold the gut of their hosts? everted proboscis lemnisci Glands Genital ligament 3 Macracanthorhyncus spp ia a parasite of canines pigs man cattle 4 Gigantorhynchus gigas can measure up to ___ cm. 10 25 45 65 5 Intermediate host of Polymorphus spp is __ a crustacean a bird a cat intestine of avian 6 Clinical symptoms of acanthecephalan parasite include the following except anaemia stunted growth and development hair loss emancipation 7 They are segmented worms and haematophagous, feeding on vertebrate hosts. What are they? ectoparasites Leeches hermaphrodites clitellum 8 Why are leeches considered temporary ectoparasites? Leeches are considered temporary ectoparasites because they separate from their hosts after blood meal Leeches are considered temporary ectoparasites because they belong to phylum Annelida and are hermaphrodites Leeches are considered temporary ectoparasites because they feed on vertebrate hosts Leeches are considered temporary ectoparasites because they are used to remove blood from patients 9 Most leeches feed on ___ human blood small invertebrates avian hosts other protozoans 10 What is hirudin? Hirudin is the anterior and posterior ornamentation on leeches, which they use to attach to their hosts. Hirudin is the anterior sucker that leeches use to connect to their hosts for feeding. Hirudin is an anticoagulant enzyme,which leeches release into the hosts' blood streams. Hirudin is the connective tissue of acanthocephals 11 Eggs of leeches are held in cocoons with the use of __ clitellum reciprocal fertilization exchange of gametes copulation 12 What are arthropods? Arthropods are invertebrates, which complete their life cycle only in aquatic environments Arthropods are vertebrates, which are characterized by the possession of cuticular skeleton. Arthropods are endoparasites of other animals. Arthropods are winged invertebrates possessing cuticular exeoskeleton 13 They act as either parasite vectors or as ecto-parasites themselves and characteristically possess jointed appendages. What are they? Cestodes Insects and Arachnids Trematodes Flatworms 14 What type of arthropods are usually more common as vectors of diseases? Black flies and sand flies Arthropods with incomplete metamorphosis Arthropods with complete metamorphosis All arthropods 15 Which are the most successful animals on land? Cestodes Trematodes Nematodes Arthropods are winged invertebrates possessing cuticular exeoskeleton 16 How can arthropods serve as vectors? biologically mechanically Options A and B arthropods do not serve as vectors 17 They have a global distribution, comprise one of the largest parasite groups, and cause a number of debilitating and deforming diseases. What are they? Naucrates doctor Nematodes Arthropods Digenea 18 In a parasitic association, abiotic factors in the host which influence the survival, distribution, prevalence and intensity of the parasite include the following except __ CO2 O2 N2 pH 19 Which of the following is not correct term used in describing host selection of parasites? Multixenous, if parasite utilizes many unsuitable hosts Polyxenous, if the parasites uses many suitable hosts Monoxenous, if parasite possesses a single host Oligoxenous, if the parasite utilizes a small range of host 20 When parasites and hosts exert reciprocal selective pressures on each other, ________ results. selective adaptation physiological pressure rapid reciprocal adaptation rapid evolutionary change