Inglise keel unit 5 answers
45. (calcium ions/Ca ) released from sarcoplasmic reticulum;
bind to troponin;
troponin changes shape;
troponin/tropomyosin, moves;
myosin binding site exposed;
myosin head binds (to actin); 3 max
[3]
46. (Alzheimer’s)
1 reduced uptake of isotope/less positrons emitted/less glucose in brain
2 cells;
3 reduced blood flow;
4 reduced brain activity;
5 reduced respiration in cells;
AVP; e.g. parts of brain accept reverse argument for all points 3 max
[3]
47. (i) control explained/AW; R control without explanationf 1
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