Marcia has had classes all morning.Because she hasn't eaten since breakfast,she is now extremely hungry.Marcia's hunger is being triggered by the hormone ________,which is secreted by the ________.

Question

Quizplus · Accepted Answer

Orexin is the hormone that stimulates hunger and is secreted by the hypothalamus. Leptin is a hormone that regulates energy balance and is secreted by adipose tissue. PYY is a hormone that suppresses appetite and is secreted by the small intestine. Therefore, choice A is the correct answer as it correctly identifies the hormone and the organ where it is secreted in response to hunger. D is incorrect because orexin is not secreted by the stomach. B is incorrect because leptin is not responsible for triggering hunger but rather for regulating energy balance. C is incorrect because PYY suppresses appetite rather than stimulates hunger.

Marcia Has Had Classes All Morning