Question

1. what role do the muscles and blood vessels play in the negative feedback loop of thermoregulation?

stimuli
sensors
integration centers
effectors

Explanation:

In thermoregulation's negative feedback loop:

1. Stimuli are temperature changes, not muscles/vessels.
2. Sensors detect temperature (e.g., skin receptors).
3. Integration centers (e.g., hypothalamus) process signals.
4. Effectors carry out responses: muscles shiver to generate heat, blood vessels constrict/dilate to adjust heat loss, acting on signals from the integration center.

Answer:

O effectors