Aperson is swimming when a fish touches his foot. his heartbeat and breathing increase for a few seconds until he realizes the fish is harmless. which part of the nervous system returns his heartbeat to normal?

How had the study of mitosis affected scientists knowledge of cancer

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.