ESM231

Which of these is not true of
DDT?

Pyrethroids fall into two
categories based on their
acute

One of these is not of
importance in the conduct
of risk assessments.

is a metalloid which forms a
number of toxic compounds

Which of these statements
is NOT true of synthetic
pyrethroids ?

The rate of extent of
absorbtion of hydrophobic
chemicals depends of these
factors except

The micro-organisms in the
sediments at the bottom
bio-transformed the organic
mercury ions methyl and
___________ mercury

Ludwig Rehn reported
elevated incidences of
bladder cancer in dye
workers exposed to
chemicals extracted from

9. The four routes of entry are:

Ingestion of
__can cause black sore
syndrome in Turkey

One of these substances
can easily be absorbed by
the skin:

Which of these statements
is NOT true of Rotenone ?

is a metal which is widely
used in industries, in alloys,
in plating, in batteries and
in the pigment in inks,
paints, plastics, rubber and
enamel

Lead and most of the heavy
metals have __________
effect on the (PNS) or the
(CNS)

15. DDT is a____ pesticide

The concept that at
extremely low dose, a given
substance may be nontoxic and even beneficial
while at intermediate dose,
it may be toxic is

One of these substances
can cause spontaneous
abortion when inhaled:

Acetylene is a colourless
gas with a
odour

Exposure to Toluene may
lead to one of the following
effects:

Fungicides have the
potential to be
__based on their mutagenic
activity

A mutated cells does not
necessarily form a

Pyrethroids fall into two
categories based on their
acute

has been known to be a
poisonous compound for
centuries

Following the WHO
Recommended
Classification of Pesticides
by hazard ,slightly
hazardous are in CLASS

Toxicants can cause
_which is the impairment of
the body's natural defense
mechanisms

Which of these is not a
rodenticides?

The rate and extent of
absorption of hydrophobic
chemicals depends on all
but one of these

Which of these statements
is not true of doseresponse relationship ?

Which of these events did
not occur in the 19th
Century

The toxicological properties
of _________ are very
similar to those of ethylene

Which of these is NOT true
of Paraquat

Ingestion of_____can
caused black sore
syndrome in Turkey

Ozone can cause all but
one of the following effects :

Depression of the system
will lower resistance to
infectious disease and
facilitate the development
of

Which of these events
occurred in the 17th
Century?

What does NOEL stand
for?

Exposure to n-hexane and
cyclohexane result in loss
of myelin and degeneration
of

Chemical species that
cause birth defects are
known as

The historical development
of toxicology began
with____dwellers

_________ refers to a
single exposure of duration
measure in second minutes
or hours

Which of these statements
is not true of the enzymes
Cytochrome PN450

Poisonous plants and
are extracted for hunting
and warfare

Pyrethroids that have
Peripherial CNS effects are
known as

_________ is a metal which
is widely used in industries,
in alloys, in plating, in
batteries and in the pigment
in inks, paints, plastics,
rubber and enamel

The primary risk associated
with 2,4-D and 2,4,5-T was
due to the presence small
amounts of dioxin

Inhaled benzene is readily
absorbed by the blood from
which it is taken up by

All but one of these are
groups of insecticides

The stage in which the
cancerous cells become a
malignant tumour during
the carcinogenic process is
known as the

the outer most corny layer
of the skin plays an
important role in
determining the
permeability of this layer

Many pesticides in use
have different modes of
action and levels of