Motor signals are sent by the brain to effectors.Which is an example of an effector?
A)The hypothalamus
B)Smooth muscles in the walls of blood vessels
C)Merkel cells,touch receptors in the epidermis
D)Photoreceptors,light sensors in the eyes

Question

Quizplus · Accepted Answer

Smooth muscles in the walls of blood vessels are effectors because they respond to motor signals from the brain by contracting or dilating to regulate blood flow. The hypothalamus is part of the brain and sends signals, it is not an effector. Merkel cells and photoreceptors are sensory receptors, not effectors.

Motor Signals Are Sent by the Brain to Effectors