1) The way how this increase in surface area relates to improved brain function: The more surface area increased, the more chances of connection between neutrongs there are. Therefore, there is more possible learning (which is improved function).
2) According to the hints, I would say that this question is about the small and large intestine. Keep in mind that the the intestines are needed to allow nutrients and water to diffuse into the body (during the process of expelling waste). Also,take into account that the greater the surface area, the faster the absorption will be processed.
3) You created the frontal lobe of the cerebrum in the same color clay you used to create the three muscles of the face because the main function of prefrontal cortex in the frontal lobe is to be responsible for expression of a personality. This will require the muscles that you put in the face of a model.
4) The specific functions of the motor cortex are: To deal with motor skills (responsible for any type of movement).
The specific functions of the sensory cortex: To deals with sensory things (responsible for sensory perseption of things surrounding people).
5) The up and down arrows you carved into the spinal cord are meant to represent the movement of different nerve signals. These signals, which are slso called action potential, are coordinated movements of sodium and potassium ions that are psocessed across the nerve cell membranes.
6) The wayhow the central nervous system and the peripheral nervous system work together to control the body is shown here: the peripheral nervous system alerts communication to the central nervous system of things with the limbs and organs of a body.
