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biology 0610printed 95 · PDF 95
328 pagesrevision 46933
printed 95 · PDF 95
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Question Mark Additional Guidance
2 (b) (i)| emulsification / emulsifying (fat)/ producing an emulsion ; (1) R ‘emulsion’ unqualified
(ii) | increases surface area ; Aspeeds up, enzyme reaction/ breakdown
for action of, lipase/enzyme(s) ; of fat/ absorption of fat
[2] A makes it easier to absorb
(c) (i) one mark per correct row
hormone uptake by liver | concentration of
cells glucose in the blood
insulin inc decreases ;
glucagon de increases /stays the
same ;
2]
(ii) | adrenaline ; A epinephrine, cortisol, ACTH, growth
hormone, somatostatin, thyroxine, GLP—1,
(1) GIP
(d) glucose concentration is kept, (near) constant/ within narrow limits / AW ;
any change (in concentration), is detected/ acts as a stimulus ;
correct ref to, glucose —> glycogen/ glycogen — glucose/ increasing glucose R hormones carrying out conversions
nitration / ing gl concentration ; directly
idea that it returns concentration to normal ;
idea that of correctly stops /swii off ;
ref to homeostasis ; max [3]
[Total: 16]
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