Which part of a feedback mechanism receives messages from several
sensors, compares actual conditions to set points, and determines whether
there are differences from set points?
oa) effector
ob) stimulus
oc) response
od) integrating center

D. Integrating Center

Explanation:

To maintain homeostasis in the body, the body needs to keep track of the condition within and respond to any fluctuations. Also known as the control center, the integrating center activates the effector when it sees that values of the internal condition of the body deviates from the normal range. When this happens, the effector will cause a response to get back within normal range.  

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.