peripheral nervous system

Question 1

PNS

Answer 1

• consists of the tissue outside the CNS
• 12 pairs of cranial nerves
• 31 pairs of spinal nerves
• sensory function (collects information from the receptors and transmits them along afferent neurons to the CNS)
• motor function (transmits impulses from CNS by efferent neurons to bring about an appropriate response)

Question 2

division

Answer 2

• somatic NS (conducts impulses from CNS controlling voluntary movement)
• autonomic NS (conducts impulses from CNS controlling involuntary muscles and glands)
• autonoomic SN (sympathetic = fright or flight adrenalin ; parasympathetic = rest and digest - speeds up or slows down heart and respitory, adjusts blood pressure and body temp. etc…)