What happens to the nervous system when the dog runs up to and you get scared

The body responds by secreting the hormone adrenaline, which helps during the ‘fight or flight’ actions. In this case when adrenaline is secreted, your body responds by increased pumping of the heart as the heart is one of the target organs. This blood is sent to our muscle cells. The blood to the digestive system and skin is reduced due to contractions of small nerves in these organs and this blood is directed to our skeletal muscles. You also start breathing faster due to contraction of diaphragm and rib muscles.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.