All AP Biology Resources
Example Questions
Example Question #21 : Neural Anatomy
Please complete the following statement.
The presence of __________ in the brain indicates a modification to __________.
white matter. . . electro-chemical gradients
multiple lobes. . . surface-area-to-volume ratios
the corpus callosum. . . circulation patterns
gray matter. . . sunlight exposure
folds. . . surface-area-to-volume ratios
folds. . . surface-area-to-volume ratios
Folds are present in the human brain due to the rapid evolution of brain-related tasks while the skull shape and size remained relatively constant; therefore, folds are present as modifications to limited surface-area-to-volume ratios in the skull cavity.
Example Question #537 : Systems Physiology
Which of the following is the best explanation for why we have a "blind spot?"
None of the choices are true
The optic nerve exits the optic disc through the blind spot
There are both rods and cones present, but they do not contain opsins
There are only rods in the blind spot, but no cones
There are only cones in the blind spot, but no rods
The optic nerve exits the optic disc through the blind spot
In the blind spot, there is a lack of photoreceptors as the optic nerve exits the optic disk. We normally overcome this automatically when our brains use the information of the surrounding visual field and "fills in" the blind spot.