Question

Please find the 4 true statements among the 12 listed below. Write down True or False
next to each sentence please.
 The axon arises from the perikaryon in an area devoid of Nissl substance, the axon
hillock.
 Schwann cells form myelin sheaths around the axons in the central nervous system.
 Neurons, astrocytes, oligodendrocytes, ependymal cells and microglial cells all are
derived from neuroectoderm.
 The telencephalic vesicles become the third ventricle.
 Oxyphil cells are acidophilic cells containing abundant cytoplasmic granules filled
with parathyroid hormone.
 In addition to the unmyelinated axons from hypothalamic neurosecretory neurons,
the adeno hypophysisal also contains pituicytes.
 The axons of the rods and cones project in to the outer plexiform layer of retina and
synapse with dendrites of ganglion cells.
 Cornea is the transparent anterior outer most layer of the eye that lacks blood
vessels and nerve endings.
 In the cochlea there is kinocilium.
 Perilymph is extracellular fluid that fills the bony labyrinth.
 Inner ear develops from surface ectoderm.
 The portion of each optic vesicle that interacts with the surface ectoderm induces
that area of the ectoderm to form a thickening called the lens placode (a precursor of
the lens).

Answer 1

1.The axon arises from the perikaryon in an area devoid of Nissl substance, the axon
hillock.-True

2.Schwann cells form myelin sheaths around the axons in the central nervous system - False (correct answer -Schwann cells form myelin sheaths around the axons in the peripheral nervous system, oligodendrocytes form the myelin sheaths around the axons in the central nervous system)

3.Neurons, astrocytes, oligodendrocytes, ependymal cells and microglial cells all are
derived from neuroectoderm - False ( correct answer -The Microglia cells are derived  from the bone marrow mesoderm)

4.The telencephalic vesicles become the third ventricle- False (correct answer - The telencephalic vesicles become the lateral ventricle and third vesicles develops from the diencephalic cavity).

5. Oxyphil cells are acidophilic cells containing abundant cytoplasmic granules filled
with parathyroid hormone.-True

6. In addition to the unmyelinated axons from hypothalamic neurosecretory neurons,
the adeno Hypophysial also contains pituicytes.-False (correct answer- The adeno hypophysial doesn't contain pituicytes, the pituicytes are the glial cells,present in the neurapophysis)

7. The axons of the rods and cones project in to the outer plexiform layer of retina and
synapse with dendrites of ganglion cells. -False (correct answer - The axons of the rods and cones project in to the inner plexiform layer of retina and synapse with dendrites of ganglion cells)

8.Cornea is the transparent anterior outer most layer of the eye that lacks blood
vessels and nerve endings.-false (correct answer - Cornea us the transparent outer most layer of eye which lacks blood vessels but unmyelinated nerve endings are present over there)

9.In the cochlea there is kinocilium -false (correct answer- The cochlea in the inner ear contains the stereocilia)

10.Perilymph is extracellular fluid that fills the bony labyrinth -True.

11.Inner ear develops from surface ectoderm.-true.

12.The portion of each optic vesicle that interacts with the surface ectoderm induces
that area of the ectoderm to form a thickening called the lens placode (a precursor of
the lens).- true