Which statement explains the functions of the parts of the nervous system?
- AEffectors respond to environmental changes and send impulses to the central nervous system (CNS).
- BParts of the central nervous system (CNS) can only transmit impulses to a single effector at a time.
- CParts of the peripheral nervous system (PNS) carry impulses to effectors and receptors from the central nervous system (CNS).
- DReceptors respond to environmental changes and send impulses to the central nervous system (CNS).