Please identify the effector in the following figure. Two cases of temperature regulation by homeostatic negative feedback mechanisms are depicted. The first shows a rise of body temperature being detected by thermoreceptors located in the skin and deep in the body, which send signals to the hypothalamus, which then responds and sends signals to increase sweating and to promote widening of blood vessels in the skin. These responses lower body temperature back to normal. The second case shows body temperature falling below normal. This is detected by thermoreceptors in the skin and deep in the body, which send signals to the hypothalamus, which responds by causing skeletal muscles to shiver and blood vessels in the skin to constrict. These responses raise body temperature back to normal. ANSWER Unselected skeletal muscle Unselected body temperature Unselected hypothalamus Unselected shivering Sure I AM SURE thermoreceptors