Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Secondary pollutants form from chemical reactions that occur when pollution is exposed to sunlight. Answer: sunlight
[EX A]: Secondary pollutants form from chemical reactions that occur when pollution is exposed to what?

[EX Q]: Passage: The Gaia hypothesis states that the biosphere is its own living organism. Answer: the gaia hypothesis
[EX A]: What hypothesis states that the biosphere is its own living organism

[EX Q]: Passage: In addition, endocrine signaling is typically less specific than neural signaling. The same hormone may play a role in a variety of different physiological processes depending on the target cells involved. For example, the hormone oxytocin promotes uterine contractions in women in labor. It is also important in breastfeeding, and may be involved in the sexual response and in feelings of emotional attachment in both males and females. In general, the nervous system involves quick responses to rapid changes in the external environment, and the endocrine system is usually slower actingtaking care of the internal environment of the body, maintaining homeostasis, and controlling reproduction (Table 17.1). So how does the fight-or-flight response that was mentioned earlier happen so quickly if hormones are usually slower acting? It is because the two systems are connected. It is the fast action of the nervous system in response to the danger in the environment that stimulates the adrenal glands to secrete their hormones. As a result, the nervous system can cause rapid endocrine responses to keep up with sudden changes in both the external and internal environments when necessary. Answer: nervous system
[EX A]:
Which system is capable of responding quickly to changing situations?