Regulation of heart rate is most closely associated with the
A) cerebrum
B) cerebellum
C) somatic nervous system
D) autonomic nervous system

Which element provides strength to the exoskeleton of clams and oysters

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Animals have a variety of adaptations,including trachea and gills, which allow this key process to occur. which provides the molecules necessary for cellular respiration and efficient atp synthesis?