Two ways that suggest that reflex reactions help maintain homeostasis in the human body are
1. By maintaining breathing - Maintenance of breathing is also a reflex reaction that helps maintain homeostasis on human body.
2. By recognizing discomfort level - In this case the reflex action can give message to the brain that the movement is causing discomfort and the body can move back to original position.
The outside only looks pigmented because of the color reflecting off it, but the inside is white and unpigmented because it is reflecting all the colors. Does this help?