M8. (a) evaporation of sweat do not credit sweating cools body if no reference to evaporation 1 cools body allow cools body if attempt at description of evaporation (e.g .sweat dries) for 1 mark 1 (b) (i) idea blood (passing through gut) cooled (by ice) 1 (this) cooled blood cools brain do not credit ice cools brain 1 (ii) impulses from brain / thermoregulatory centre to skin do not accept messages / signals accept hypothalmus accept electrical signals 1 vessels supplying skin surface capillaries constrict / sweat glands less active or hairs become erect do not credit capillaries constrict / move down accept reduced supply of blood to skin surface shivering (unqualified) is neutral therefore less heat lost by skin 2 [7] M9. (a) (i) glucose and galactose
M8. (a) evaporation of sweat do not credit sweating cools body if no reference to evaporation 1 cools body allow cools body if attempt at description of evaporation (e.g .sweat dries) for 1 mark 1 (b) (i) idea blood (passing through gut) cooled (by ice) 1 (this) cooled blood cools brain do not credit ice cools brain 1 (ii) impulses from brain / thermoregulatory centre to skin do not accept messages / signals accept hypothalmus accept electrical signals 1 vessels supplying skin surface capillaries constrict / sweat glands less active or hairs become erect do not credit capillaries constrict / move down accept reduced supply of blood to skin surface shivering (unqualified) is neutral therefore less heat lost by skin 2 [7] M9. (a) (i) glucose and galactose
b3-high-deman-application-qs.docx