verified to pass 2025/2026
What makes up the PNS and CNS? - correct answer ✔CNS = brain and spinal cord; integration and
processes nervous information
PNS = nerves and ganglia; send information to
and receive information from CNS (plus some
reflexes)
nerves - correct answer ✔Bundled collections of axons (aka nerve
fibers) outside the CNS
endoneurium (within) - correct answer ✔Each nerve fiber is enclosed in a CT
sheath
perineurium (around) - correct answer ✔A CT perineurium surrounds a group of fibers
(Called a fasciculus , single bundle = fassicle).
epineurium (very outside) - correct answer ✔The entire nerve is surrounded by epineurium
CT (also encloses blood vessels)
what makes up the central nervous system - correct answer ✔brain (receives and processes sensory
info) and spinal cord (connects brain and peripheral nervous system)