Grade 4-5: Describe the structures and functions of the brain including the
cerebellum, cerebral hemispheres and medulla oblongata

Cerebral hemispheres: The cerebrum's outer layer, it is split into two hemispheres and is highly folded. These two hemispheres make up the cerebral cortex. This controls most of our senses, intelligence, personality, conscious thought and high-level functions, such as language and verbal memory.

Cerebellum: Controls balance, co-ordination of movement and muscular activity.

Medulla oblongata: Controls unconscious activities such as heart rate and breathing rate.

Hypothalamus: Regulates temperature and water balance within the body.

Explanation:

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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