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 Skin
and its role in homeostasis:
When
the body is cold 1. The small
capillaries near the surface of
the skin constrict
(vasoconstriction) so less blood
flows nearer to the surface, and
less heat is lost through he
blood, etc.
.
Neuronal
Structure:
Sensory Neuron The nerve
impulses travel from left to
right in this diagram of a
sensory neuron. A stimulus
causes the impulse to be
produced by a sense organ. (skin
/ ears / eyes / tongue / nose),
etc.
.
Leaching
/ Eutrophication:
Leaching describes the "washing
out" from soils any soluble
chemicals that are not "bound"
to the soil particles. It occurs
as excess rain (or flood) waters
drain through the soil, etc.
.
Pollution:
The impact of human activities
on the earth has become
noticeable and significant
during the last century
resulting from: Increasing
population - this resulted from
increased food supply and
improved, etc.
.
Diffusion:
Diffusion is the seemingly
random movement of a substance
from where these particles are
in high concentration to where
there are fewer. The diffusion
stops where there is no
concentration gradient, etc.
.
Genetic
Terminology:
DNA
The molecule which contains
genes. It's shaped like a double
helix (a spiral) Chromosomes
Found in the cell nucleus:
X-shaped things made up of long
coils of DNA, etc.
.
Cells
/ Tissues / Organs:
Protoplasm Consists of cytoplasm
and nucleus. Cytoplasm Jelly
like substance where chemical
reactions take place and other
parts are embedded.
etc.
.
Classification
of Living Things:
Living
things are grouped into 1 of 5
kingdoms which are as follows:
Animals, Plants, Fungi, Protista,
and Monera. The list below shows
the other attributes (in order)
which are used to more accuratel,
etc
.
Life
Processes:
Movement Animals move to find
food and away from predators and
plants move towards light.
Reproduction Both animals and
plants reproduce to keep their,
etc.
.
Mitosis:
Between divisions, a copy of
each chromosome is made. The
chromosomes then start to become
visible. The centrioles separate
and move to opposite poles
(ends) of the cell. The
chromosomes are, etc.
.
Meiosis
As meiosis begins, the
chromosomes start to become
visible. At this stage they have
produced replicas of each other.
The centrioles separate and move
to opposite poles (ends) of the
cell, etc
.
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