WIP 2026 Exam Questions and
Correct Answers | New Update
What kind of nervous system do cnidarians have? - ANSWER
✔✔nerve net, interconnected neurons with no central control organ
What kind of nervous systems do echinoderms have? - ANSWER
✔✔nerve ring, signals radial nerves which signals muscles
What kind of nervous systems do bilateria / platylhementhis have? -
ANSWER ✔✔- brain & eyespots at anterior
,- transverse nerves AKA rungs
- ladder type nervous system
What kind of nervous systems do bilateria / annelids and arthropods
have? - ANSWER ✔✔- more complex brain
- ganglia
What kind of nervous systems do vertebrates have? - ANSWER ✔✔-
brain + spinal cord = CNS
- nerves + ganglia = PNS
How does the type of nervous system determine an organisms lifestyle?
- ANSWER ✔✔slow moving + simple organisms have a more basic
nervous system
fast moving + complex organisms have a more advance nervous system
What is ganglia? - ANSWER ✔✔systematically arranged clusters of
neurons
What are the 6 types of glial cells? - ANSWER ✔✔1) ependymal
2) astrocytes
3) microglial
4) oligodendrocytes
,5) Schwann cells
6) radial
What are ependymal cells? - ANSWER ✔✔line cavities of the brain
and spinal cord
circulate cerebrospinal fluid
What are astrocytes? - ANSWER ✔✔involved with brain blood barrier
and neurons
What are microglial cells? - ANSWER ✔✔macrophages of the CNS,
immune functions
What is myelination and why is it important? - ANSWER ✔✔- fatty
membrane around axons of a neuron
- insulates action potentials
What are oligodendrocytes? - ANSWER ✔✔produce myelin in CNS
What are Schwann cells? - ANSWER ✔✔form myelin sheath in PNS
What are radial glia? - ANSWER ✔✔guides migration and growth of
immature neurons in developing embryo
What does the Central Nervous System include? - ANSWER
✔✔brain and spinal cord
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3
, gray matter surrounds white matter
What is white matter? - ANSWER ✔✔myelinated axons
What is gray matter? - ANSWER ✔✔- unmyelinated axons
- cell bodies
- short range communication
What are ventricles? - ANSWER ✔✔hollow and filled w/ CSF
What is the spinal cord? - ANSWER ✔✔link b/t brain and rest of
nervous system
includes dorsal, neck/back, within spine
white matter surrounds gray matter
Why is the white/gray matter flipped? - ANSWER ✔✔due to how the
brain formed in development
What are the functions of the spinal cord? - ANSWER ✔✔transmits
impulses to/from brain
reflex actions
What are reflex actions? - ANSWER ✔✔rapid, involuntary response
to stimulus