Memory is not a sensory system. It is a cognitive process that allows us to store and retrieve information.

The retina is a thin layer of tissue at the back of the eye that contains photoreceptor cells. These cells convert light into electrical signals that are sent to the brain.

The retina contains three types of photoreceptor cells: rods, cones, and ganglion cells. Rods are responsible for vision in low-light conditions, while cones are responsible for color vision and high-acuity vision. Ganglion cells send signals from the retina to the brain.

The cochlea is a spiral-shaped organ in the inner ear that contains hair cells. These cells convert sound waves into electrical signals that are sent to the brain.

The olfactory bulb is a structure in the brain that receives signals from the olfactory receptors in the nose. These signals are then sent to the brain, where they are interpreted as smells.

Taste buds are small structures on the tongue that contain taste cells. These cells convert taste molecules into electrical signals that are sent to the brain.

The somatosensory cortex is a region of the brain that receives signals from the touch receptors in the skin. These signals are then interpreted as touch sensations.

Thermoreceptors are not mechanoreceptors. They are sensory receptors that respond to changes in temperature.

The vestibular system is a sensory system that helps us to maintain balance. It consists of three semicircular canals and two otolith organs.

The cupula is not a type of vestibular receptor. It is a structure in the semicircular canals that is responsible for detecting changes in angular acceleration.

The proprioceptive system is a sensory system that helps us to sense the position of our body and its limbs. It consists of muscle spindles and Golgi tendon organs.

Vestibular receptors are not proprioceptive receptors. They are sensory receptors that help us to maintain balance.

The nociceptive system is a sensory system that helps us to detect pain. It consists of free nerve endings and nociceptors.

Thermoreceptors are not nociceptors. They are sensory receptors that respond to changes in temperature.

The reticular activating system is a network of neurons in the brainstem that helps to control arousal and attention.