1.1 The widening of the blood vessels
close to the skin's surface in order to
increase heat loss by radiation.
2.1 The narrowing of the blood vessels
close to the skin's surface in order
to reduce heat loss by radiation.
3 Insulin controls blood
sugar levels by converting
excess glucose into
glycogen (which is then
stored in the liver).
4 Depressant drugs
4.1 This type of drug binds with
receptors in synapses.
Transmitter can no longer
bind to receptors. The drug
can also bind with
released or break down the
5 Stimulant drugs
5.1 Cause more
neurotransmitter to diffuse
across the synapse.
6.1 Have an elongated axon to make
connections from one part of the
body to another.
6.2 Insulating sheath to speed up
the nerve impulse.
6.3 Dendrites, which are branched endings, to
allow a single neurone to act on many
7 Fats are made up of fatty acids and glycerol.
8.1 Being free from
9.1 Relates to how much physical activity
you're capable of doing, and how quickly
your body recovers afterwards.
10 Global warming
10.1 Sun's rays pass through the atmosphere.
CO2 reduces/re-radiation passing back out to
space. CO2 traps heat from Earth. Because
CO2 reflects back the radiation.
11 A parasite is an organism that lives off other
organisms causing them harm.
12 Animal cells lose the ability to differentiate. Plant cells retain the
ability to differentiate throughout their lives. So basically, plants
retain stem cells but animals do not.