Which of the following statements regarding the digestive system is correct? a peristalsis occurs in each organ, enabling nutrients to be more easily absorbed. b wherever mechanical digestion occurs, chemical digestion also occurs. c all organs contain glands that release enzymes for chemical digestion. d the ph of each organ is the same so the food can easily move through the system.

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.