CNS/Eye Histology and SUMMARY

Question 1

what stain is used for the CNS? What does it stain?

Answer 1

Nissyl (cresyl violet)
Rough ER (special stains for branches)

Question 2

What does the ependyma line? What does it have?

Answer 2

Ventricles of brain and spinal cord

Cilia in lumen for ion transfer

Question 3

What staining is used for grey matter of cerebral cortex? (Can’t see neuronal processes)

Answer 3

H&E

Question 4

What do peduncles do? What are the folds on them called?

Answer 4

Attach cerebellum to brain stem

Folia

Question 5

What enzymes does the lacrimal gland contain?

Answer 5

Lysozymes

Enzymes to remove XS H20

Question 6

What epithelium lines the cornea? What else does the cornea have?

Answer 6

Stratified non-keratinised epithelium
Microvilli to hold tear fluid
Stroma - thick layer of collagen

Question 7

Describe the lens histologically

Answer 7

LIving cell with no organelles?

Cuboidal epi cells secrete collagen

Question 8

What does the retina contain?

Answer 8

Choroid
Tapetum lucidum
Epi cells with microvili

Question 9

If the visual cortex was damaged on one side of animal, what would it see?

Answer 9

Issues with other side

Optic nerves cross