Shivering occurs when many muscles contract a little bit all at once, and heat production is increased by shivering and non-shivering thermogenesis . Given these facts, what ccurs when many muscles contract a little bit all at once among the following options:
- heat production
 - heat loss
 - sweating
 - permineralization
 - hypothermia
 - resistance
 - cramping
 - heat energy


 

 heat production        