UAMS Parasitology Exam One Questions and
Answers (100% Correct Answers) Already
Graded A+
Parasitology [ Ans: ] The study of relationships among
organisms of different species, in which one organism
(parasite) lives in or on another organism (host)
Symbiosis [ Ans: ] "Living Together"- the relationship
between the parasite and the host
Mutualism [ Ans: ] Both parasite and host benefit
Commensalism [ Ans: ] Parasite benefits, host is
unaffected
Neutralism [ Ans: ] both parasite and host are unaffected
Parasitism [ Ans: ] parasite benefits at the expense of the
host
Successful Parasite [ Ans: ] establishes an equilibrium with
the host so both exist
Unsuccessful Parasite [ Ans: ] does not establish an
equilibrium with the host
-host expels parasite
-host destroys parasite
,-parasite kills host
Endoparasite [ Ans: ] found within the host's tissues or
cells
Ectoparasite [ Ans: ] found on the host's surface- skin or
outer mucosal area
Facultative Parasite [ Ans: ] Parasite may exist as free-
living organism or parasite (opportunistic)
Obligate Parasite [ Ans: ] must spend part or all of its life
cycle in or on a host (restricted)
Accidental Parasite [ Ans: ] parasite normally lives in or on
a host other than humans but can infect humans
accidentally
Zoonosis [ Ans: ] A disease involving a parasite that has
accidentally infected a human; the normal host for the
parasite is an animal.
Intermediate Host [ Ans: ] Harbors parasite during larval
or asexual stage
Example of an Intermediate Host [ Ans: ] Pig ingest
tapeworm egg; egg hatches; larva migrates to muscle
tissue where it forms a cyst-like structure
Definitive Host [ Ans: ] Harbors parasite during adult or
sexual stage
, Example of a Definitive Host [ Ans: ] Human ingests
undercooked pork (contains tapeworm cyst-like structure);
larva leaves cyst-like structure and matures into an adult
tapeworm; begins reproductive cycle in the human
Transport (Paratenic) Host [ Ans: ] Supplies nourishment
to the parasite, but is not essential in the parasite's life
cycle. Host serves as a carrier
Example of Transport (Paratenic) Host [ Ans: ] Dog
roundworm ova ingested by humans, the larvae hatch,
survive and migrate in the human body. If human were
eaten by a dog, the parasite's life cycle would continue
Reservoir Host [ Ans: ] An animal that is infected with a
parasite with no ill effects, but can spread the parasite to
humans
Example of Reservoir Host [ Ans: ] Beavers are a definitive
host for Giardia duodenalis, as well as humans. Beavers
cause an infestation within a water source and spread it to
humans who drink the water
Mechanical Vector [ Ans: ] accidental or non-essential
transmission
Ex: fly transferring an amoeba from feces to the
countertop
Biological Vector [ Ans: ] Essential for life cycle of
parasite; required for development or reproduction
Answers (100% Correct Answers) Already
Graded A+
Parasitology [ Ans: ] The study of relationships among
organisms of different species, in which one organism
(parasite) lives in or on another organism (host)
Symbiosis [ Ans: ] "Living Together"- the relationship
between the parasite and the host
Mutualism [ Ans: ] Both parasite and host benefit
Commensalism [ Ans: ] Parasite benefits, host is
unaffected
Neutralism [ Ans: ] both parasite and host are unaffected
Parasitism [ Ans: ] parasite benefits at the expense of the
host
Successful Parasite [ Ans: ] establishes an equilibrium with
the host so both exist
Unsuccessful Parasite [ Ans: ] does not establish an
equilibrium with the host
-host expels parasite
-host destroys parasite
,-parasite kills host
Endoparasite [ Ans: ] found within the host's tissues or
cells
Ectoparasite [ Ans: ] found on the host's surface- skin or
outer mucosal area
Facultative Parasite [ Ans: ] Parasite may exist as free-
living organism or parasite (opportunistic)
Obligate Parasite [ Ans: ] must spend part or all of its life
cycle in or on a host (restricted)
Accidental Parasite [ Ans: ] parasite normally lives in or on
a host other than humans but can infect humans
accidentally
Zoonosis [ Ans: ] A disease involving a parasite that has
accidentally infected a human; the normal host for the
parasite is an animal.
Intermediate Host [ Ans: ] Harbors parasite during larval
or asexual stage
Example of an Intermediate Host [ Ans: ] Pig ingest
tapeworm egg; egg hatches; larva migrates to muscle
tissue where it forms a cyst-like structure
Definitive Host [ Ans: ] Harbors parasite during adult or
sexual stage
, Example of a Definitive Host [ Ans: ] Human ingests
undercooked pork (contains tapeworm cyst-like structure);
larva leaves cyst-like structure and matures into an adult
tapeworm; begins reproductive cycle in the human
Transport (Paratenic) Host [ Ans: ] Supplies nourishment
to the parasite, but is not essential in the parasite's life
cycle. Host serves as a carrier
Example of Transport (Paratenic) Host [ Ans: ] Dog
roundworm ova ingested by humans, the larvae hatch,
survive and migrate in the human body. If human were
eaten by a dog, the parasite's life cycle would continue
Reservoir Host [ Ans: ] An animal that is infected with a
parasite with no ill effects, but can spread the parasite to
humans
Example of Reservoir Host [ Ans: ] Beavers are a definitive
host for Giardia duodenalis, as well as humans. Beavers
cause an infestation within a water source and spread it to
humans who drink the water
Mechanical Vector [ Ans: ] accidental or non-essential
transmission
Ex: fly transferring an amoeba from feces to the
countertop
Biological Vector [ Ans: ] Essential for life cycle of
parasite; required for development or reproduction
