Hormones are chemical messengers released from endocrine glands that travel through the blood system to influence the nervous system to regulate behaviors such as aggression, mating, and parenting of individuals. 1  Aggression. 2  Hormones. 3  Parental behaviors. 4  Sex differences. 5  Sexual behavior. 6  Steroids.
San Francisco International Airport Weather Today (1â3 days) Mostly dry. Very mild (max 17Â°C on Tue morning, min 9Â°C on Tue night). Wind will be generally light. San Francisco International Airport Weather (4â7 days) Mostly dry. Very mild (max 19Â°C on Fri afternoon, min 12Â°C on Thu night). Wind will be generally light. 10 Day San Francisco International Airport Weather (7â10 days) Mostly dry. Very mild (max 20Â°C on Tue afternoon, min 13Â°C on Sun night). Wind will be generally light.
Chicago Weather: Winter storm brings ice, rain, gusty winds. A winter storm created icy conditions on roadways and more than 1,700 flights were canceled at Chicago's airports. A winter storm brought a mixed bag of precipitation and blizzard-like conditions to the Chicago area Monday.