How could a nervous system disorder affect the respiratory system?

> it could restrict air flow through the bronchi.
> it could disrupt the rate of ventilation.
> it could prevent hemoglobin from binding to oxygen.
> it could decrease the surface area of alveolar sacs.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits