Final answer:
Sensory stimuli from the environment first register in our sensory memory before being processed by the CNS, which leads to an integrated motor response.
Step-by-step explanation:
When we first receive stimuli from the external environment, it registers in our sensory memory as part of the reception process. Sensory receptors activated by stimuli such as touch, chemicals, or temperature respond to these stimuli. Stimuli are initially processed in our sensory memory, which is very brief and only lasts for a couple of seconds. Following this, if the stimulus is deemed valuable, it moves into our short-term memory system. From here, these sensory signals are transmitted into the central nervous system (CNS) where integration occurs. This integration within the CNS involves comparing incoming stimuli with existing memories or the current state, and may lead to a motor response as the result of the processing in the cerebral cortex.