Vitamin B 12 deficiency anemia is more common in individuals of northern European descent. The condition is caused by one of the following: Vitamin B 12 deficiency caused by a lack of intrinsic factor in gastric (stomach) secretions--intrinsic factor is necessary for absorption of vitamin B 12.This type of B 12 deficiency anemia is technically pernicious anemia.itamin B 12 deficiency anemia is more common in individuals of northern European descent. The condition is caused by one of the following: Vitamin B 12 deficiency caused by a lack of intrinsic factor in gastric (stomach) secretions--intrinsic factor is necessary for absorption of vitamin B 12.
The body takes a very active role in temperature regulation. The temperature of the body is regulated by neural feedback mechanisms which operate primarily through the hypothalmus. The hypothalmus contains not only the control mechanisms, but also the key temperature sensors.
in human nervous system: Temperature regulation. The sympathetic system is the most important part of the nervous system for controlling body temperature. On a long-term basis, when the climate is cold, the sympathetic system produces heat by its control of certain fat cells called brown adipose tissue. From these cells, fatty acids are released, and heat is produced by their chemical breakdown.