The mannose 6-phosphate residue is important, as it is required to target soluble enzymes to the . The two enzymes responsible for attaching this residue onto these soluble enzymes reside in the .

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger