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32 Cards in this Set
- Front
- Back
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What is parfocal? |
Microscopes are parfocal- when you focus with one lens then change lenses, the object should still be in focus |
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When looking at unstained preparations, keep the condenser _____ (up/down). |
Down |
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When looking at stained slides, keep the condenser _____ (up/down). |
Up |
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What are the four stages of life cycle for ticks and lice? |
1. egg 2. larva 3. nymph 4. adult |
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Nymph and adult ticks and lice have ___ legs, while larva have ___ legs. |
1. 8 2. 6 |
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Amblyomma americanum is known as _____ |
The Lone Star Tick |
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Which species of ticks had very long mouth parts that make their bites painful and susceptible to secondary infection? |
Amblyomma americanum |
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Where is the Amblyomma species most often found? |
Southern states east of the Rocky Mountains, currently expanded northward |
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Which species of tick is known as the American Dog Tick? |
Dermacentor variabilis |
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Where is Dermacentor variabilis found? |
US, Mexico, Canada |
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Dermacentor variabilis is a ___ host tick |
three host tick |
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Which tick is commonly called the Winter Tick? |
Dermacentor albipictus |
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Which animal population is Dermancentor albipictus currently causing problems with? |
Moose |
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Which genus of tick is most identifiable by their anal groove? |
Ixodes |
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Which species of tick is known as the Deer Tick? |
Ixodes scapularis |
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Ixodes scapularis is notorious as a vector of what? |
Lyme disease |
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Which species of tick is known as the Brown Dog Tick? |
Rhipicephalus sanguineus |
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What are the three identifying parts of fleas?
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1. wingless 2. laterally compressed bodies 3. usually dark colored |
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What structures do flea larva have that make them identifiable from maggots? |
Anal struts |
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How are lice distinguished from fleas? |
They have a dorsally flattened body |
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Which two groups are lice divided into? |
1. Sucking lice (Anoplura) 2. Biting lice (Mallophaga) |
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All species of human lice are _______ |
sucking lice |
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How do you distinguish a biting louse from a sucking louse? |
A biting louse has a head that is wider than its thorax. A sucking louse has a head that is narrower than its thorax. |
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Flies have a life cycle involving ________. |
complete metemorphasis |
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What do mosquitoes use to pierce the skin and suck blood? |
a proboscus |
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What is the genus name of midges/no-see-ums?
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Culicoides |
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What is the family name for black flies? |
Simuliidae |
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What is distinguishable about black flies? |
their humpbacked appearance |
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Which species of fly is known as the stable fly? |
Stomoxys calcitrans |
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Male horse flies are ____, while female horse flies are _____. |
1. holoptic (eyes not separated medially) 2. dichotic (eyes separated) |
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Fly strike is known as |
cutaneous myiasis; caused by maggots laid in a live animals |
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What is the spiracle and how are they used by forensic scientists? |
1. Breathing hole at the posterior end of the fly 2. Used to determine how long as body has been dead |
