Histology, Brain, Spinal Cord, Cranial Nerves Quiz

Question 1

Cranial and spinal nerves are part of CNS or PNS?

Answer 1

PNS

Question 2

Where are sensory neurons located?

Answer 2

PNS

Question 3

Function of sensory neurons?

Answer 3

Detect changes, sensations or stimuli and relay info to interneurons in CNS

Question 4

Where are interneurons? What are its function?

Answer 4

• In spinal cord and brain (CNS)

- Interpret info and decide how body should react (sends to motor neurons)

Question 5

Motor Neurons functions?

Answer 5

• Transmit info from interneurons to:
  1) glands
  2) organs
  3) muscles

For a response.

Question 6

Location of Neuron?

Function?

Answer 6

• CNS/PNS

- Initiate, transmit, and receive nerve impulse

Question 7

Location of Schwann Cell (Neurolemmocyte)?

Function?

Answer 7

• PNS

- Insulates and speeds up electrical activity

Question 8

Oligodendrocyte location?

Function?

Answer 8

• CNS

- Produces myelin - Insulates and speeds up electrical activity

Question 9

Astrocyte location?

Function?

Answer 9

• CNS
  1) Feeds neurons
  2) Replaces DAMAGED neurons
  3) Forms blood-brain barrier (BBB)

Question 10

Microglial Cell location?

Function?

Answer 10

• CNS
  1) Pathogen defense
  2) Removes debris, dead/dying cells

Question 11

Ependymal cell location?

Function?

Answer 11

-CNS

Makes and moves cerebral spinal fluid

Question 12

What are functions of meninges?

Answer 12

1) Protective barrier for brain
2) Protects blood vessels
3) Contains/Circulates CSF

Question 13

What is meningitis? What causes it?

Answer 13

Inflammation of meninges caused by bacterial infetion

Question 14

What is mixed nerve?

Answer 14

Mixed nerves carries motor, sensory, and autonomic signals between spinal cord and body

Question 15

What cranial nerves are not mixed?

Answer 15

Abducens
Acessory
Hypoglossal
Olfactory
Optic
Trochlear
Vestibular-cochlear

Question 16

What is the corpus callosum?

Answer 16

• Nerve fibers (made of white matter) that divides right and left hemisphere
• Allows communication

Question 17

What is contained within ventricles and subarachnoid space

Answer 17

Cerebrospinal fluid

Question 18

Which nerves have dorsal and ventral roots?

Answer 18

Spinal nerves

Question 19

Dorsal Roots

Answer 19

• AFFERENT sensory root brings SENSORY INFO from body –> spinal cord/brain

Question 20

Ventral Roots

Answer 20

EFFERENT motor axons brings MOTOR INFO from brain to body