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Contemporary Issues in Biology Exam 3 Sawey, TCU 2024/2025 already graded A+
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Contemporary Issues in Biology Exam 3Sawey, TCU
Until malaria and AIDS, what was the most devastating plague? - ANSThe Black Death
How did 17th century doctors treat the plague? - ANSThey inspected patients with pointers
and would use spice-filled pomanders to fend it off.
What feeds off on blood of mammals such as rats and birds, in which they spread the
bacteria that causes plagues? - ANSFleas
How do people normally get the plague? - ANSFrom being bitten by a rodent flea that is
carrying the bacterium or by handling infected animals.
True or false: Modern antibiotics isn't effective against plague. - ANSFALSE
what feeds on human blood usually at night while the person sleeps? - ANSbedbugs
True or false:Only the adult stage of bedbugs feed on human blood. - ANSFALSE
What stage of the bed bug bites obtain blood? - ANSlarva and adults
Its the most deadly diseases in human history.Caused by a parasite transmitted by female
anopheles mosquitos. - ANSMalaria
True or false: adult female anopheles mosquitoes feed on blood for protein to make eggs. -
ANSTRUE
What are some historic efforts to defeat Malaria? - ANS-draining wetlands to reduce habitat
-Control of mosquitoes using DDT
Consequences of trying to cure malaria through hurting the mosquito population? - ANS-We
lost wetlands
-DDT bioaccumulated and hurt birds
-killed beneficial insects
How many people are sick from malaria per year?
How many people does it kill per year? - ANS219,000,000 per year
Kills 600,000 per year, mostly children
What age is malaria most common in? - ANSunder the age of 5
What part of the world does Malaria impact the most? - ANSAfrica
, What is the protozoan that causes malaria and destroys red blood cells? - ANSplasmodium
(4 diff. types)
A protozoan is a single celled organism
Order of Malarial parasite life cycle - ANStransmitted by bug to human-->enters blood steam
and goes into liver where red blood cells multiply-->eggs reproduce and destroy cells
What is Chloroquine and what happened with its use? - ANSIt is a medication to
treat/prevent malaria; parasites became resistant
New treatment of malaria and where it comes from? - ANSPyrethrin - comes from
chrysanthemums. Responsible for saving more than a million lives
What are some other ways of treating Malaria? - ANS-insecticide-treated bed nets
-spraying insecticide in homes
Where did West Nile virus first appear in the U.S.? - ANSIn NY in 1999
What is a virus that is transmitted through mosquitoes from birds? - ANSWest Nile virus;
causes flu-like symptoms and 1/150 experience neurological diseases
What is responsible for a lot of deaths in birds and is found in over 200 types of birds? -
ANSWest Nile
What feeds on blood to get protein to make eggs and anchors their mouth below the skin? -
ANSTicks
True or false: there are different stages of the deer (backlegged) tick that transmits Lyme
disease - ANSTRUE
What corkscrew-shaped bacteria causes Lyme disease? - ANSBorrelia
The _____ stage of the deer tick primarily transmits the Lyme disease. - ANSnymph
How do humans not know when the deer tick is biting them? - ANSIt injects an anesthetic
into the skin to mask the pain of bite.
Effects of Lyme Disease - ANS-flu-like symptoms
-bull's eye rash at site of bite
-arthritis-like symptoms
-bacteria may attack NS which results in behavior and memory changes
-Rarely can result in death
True or false: Patients treated with appropriate antibiotics in early stages of Lyme disease
usually recover over a long period of time. - ANSFALSE; recover rapidly and completely
(most cases)
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