Final answer:
Cachexia is a condition characterized by weight loss in cancer patients despite adequate calorie intake. It may be due to factors such as increased metabolism, decreased appetite, and the body's response to the tumor.
Step-by-step explanation:
Cachexia is a condition characterized by weight loss in cancer patients despite adequate calorie intake. It may be due to factors such as increased metabolism, decreased appetite, and the body's response to the tumor. The weight loss in cachexia comes at the expense of muscle and fat tissue, which is broken down by the body to provide energy.