26. The cerebral cortex includes the following layers:
(1) internal granular (2) internal pyramidal (3) multiform (polymorphic) (4) molecular
27. The following statements regarding the granular type of the cerebral cortex are
true:
(1) contains a well-developed external granular layer (2) contains a well-developed internal
granular layer (3) is characteristic of sensitive areas of the cortex (4) contains a well-
developed internal pyramidal layer
28. The following statements regarding the agranular type of the cerebral cortex are
true:
(1) contains a well-developed external pyramidal layer (2) contains a well-developed
internal pyramidal layer (3) is characteristic of motor areas of the cortex (4) contains a
well-developed polymorphic layer
9. PRIMARY SENTIENT SENSE ORGANS
Directions
: each of the following statements contains five suggested completions. Choose
the one that is best in each case.
1. Each of the following statements concerning the cornea is true, EXCEPT:
A
– is transparent; B – is avascular; C – receives nutrition by diffusion; D – is composed of
five layers; E
– contains numerous melanocytes.
2. Each of the following statements concerning the corneal epithelium is true,
EXCEPT:
A
– is stratified squamous nonkeratinized; B – is transitional; C – is bathed by tears; D – is
highly innervated; E
– arises from ectoderm.
3. Each of the following statements concerning the ciliary body is true, EXCEPT:
A
– is avascular; B – is a modification of the eye vascular tunic; C – has processes with
suspensory ligaments; D
– contains intrinsic muscles; E – takes part in accommodation.
4. Each of the following statements concerning the iris is true, EXCEPT:
A
– is a modification of the eye vascular tunic; B – blocks light entering except via the
pupil; C
– lacks colour; D – contains intrinsic muscles; E – regulates the amount of light
entering the eye.
5. Each of the following statements concerning the photoreceptors is true, EXCEPT:
A
– are bipolar neurons; B – form synapses with amacrine cells; C – their dendrites have
the outer and inner segments; D
– their axons synapse with bipolar cells; E – their cell
bodies constitute the retinal outer nuclear layer.
6. Each of the following statements concerning the rods is true, EXCEPT:
A
– number about 120 million; B – their outer segments include flat membranous disks; C
– contain rhodopsin; D – are responsible for black-white vision; E – are excited by bright
light.
7. Each of the following statements concerning the cones is true, EXCEPT:
A
– their outer segments contain plasma membrane invaginations; B – their inner
segments contain an ellipsoid; C
– are excited by low-intensity light; D – are responsible
for colour vision; E
– contain iodopsin.
8. The retinal inner nuclear layer contains nuclear regions of the following cells,
EXCEPT:
A
– bipolar cells; B – ganglion cells; C – horizontal cells; D – amacrine cells; E – Muller
cells.
9. The retinal ganglion cell layer contains the cell bodies of:
A
– photoreceptors; B – horizontal cells; C – amacrine cells; D – bipolar cells; E – ganglion
neurons.
