When the turkey at 45°C is placed into the oven at 185°C and the oven is immediately turned off, the turkey will start to absorb heat from the surrounding air in the oven. The heat transfer occurs because the temperature of the oven is initially higher than that of the turkey.
As the turkey absorbs heat, its temperature will rise. However, once the oven is turned off, the temperature inside the oven will begin to equalize with the cooler air outside. The rate of temperature increase in the turkey will be affected by the heat transfer from the surrounding air in the oven, which will gradually decrease as the temperature difference between the turkey and the air diminishes.
Eventually, the turkey will reach thermal equilibrium with the oven environment, but because the oven is no longer being heated and will slowly cool down, the temperature of the turkey will not reach the initial temperature of the oven. Instead, the turkey will warm up to a maximum temperature that is lower than 185°C, but higher than 45°C, before starting to cool again as the oven cools down.
In summary, the turkey will heat up initially but will not stay at a high temperature for long since the oven is turned off and will ultimately begin to cool down.