Which of the following statements is true? a. sweating is an example of positive feedback. b. shivering is an example of negative feedback. c. the nervous system is responsible for sensing changes in the environment. d. all of the above

D, all of the above. Your body sweats when it gets too hot to cool the body, and shivers when it gets too cold to heat the body. The nervous system is responsible for sensing everything in and around the body.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.