Thermoreceptors detect body temperature and send impulses to the brain for analysis. if body temperature is low, the brain will signal skeletal muscles to perform brief, repeated contractions to generate heat. in this example, what is the effector?

The skeletal muscles

Explanation:

Remember in our body we have the receptors that are the ones that receives signals from the environment by our senses and send the information to our brain ( in this case the thermoreceptors). Also we have the effectors, the organs or cells that receives the information from the brain and act as a consequence of this signal ( in this case the skeletal muscles).

answer; polycythemia is the correct answer;