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B2
Cells, Tissues and Organs,
Photosynthesis, Sampling and
handling environmental data,
enzymes, respiration, genetics
and cell division, speciation…read more

Slide 2

Slide 3

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If body temp is too high
Blood vessels supplying skin dilate so more
blood flows through the capillaries and more
heat is lost (vasodilation)
Sweat glands release more sweat which cools
the body as it evaporates…read more

Slide 4

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If body temp is too low
Blood vessels supplying skin capillaries
constrict as to reduce blood flow
Shivering ­ contraction of muscles need
respiration which releases some energy as
heat…read more

Slide 5

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Plant cell
Range to 10-100 micrometers
Ribosomes ­ Protein synthesis
Cell wall ­ made of cellulose, which supports and the
strengthens the cell
Nucleus ­ Contains genetic material that controls the
activities of the cell
Mitochondria ­ Where respiration takes place, so energy is
created
Vacuole ­ contains cell sap, a weak solution of sugar and
salts
Chloroplasts ­ these are where photosynthesis occurs, which
makes food for the plant, they contain a green substance
called chlorophyll
Cell membrane ­ holds the cell together and controls what
goes in and out
Cytoplasm ­ Jelly like substance where most of the chemical
reactions take place. It contains enzymes that control these
chemical reactions…read more

Slide 6

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Animal cell
Range between 10 and 30
micrometers
Mitochondria ­ where respiration
takes place, so energy is created
Ribosomes ­ protein synthesis
Cytoplasm ­ jelly-like substance
where most of the chemical reactions
take place. Contains enzymes which
control the chemical reactions
Nucleus ­ contains genetic
information that controls the activities
of the cell
Cell membrane ­ holds the cell
together and controls what goes in
and out…read more

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