Brain Bee - CH2 for Ashna

Visual system involves about how much percent of cerebral cortex?

• 10%

• 30%

• 50%

• 70%

Which one the the following is not a model used to study how light energy is converted into electrical signals?

• Fruit Fly

• Mouse

• C. elegance

• Drosophila

What does iris do?

• Regulates how much light enters into eyes by changing size of pupils

• Bends light so that it focuses on inner surface of eyeball

• Has neural sensory cells, like rods and cones, on it; senses light

• Pass on neural electric signals to occipital lobe.

Visual input is mapped onto retina as

• 2D reversed

• 2D upright

• 3D reversed

• 3D upright

Retina has how many layers?

• 1

• 2

• 3

• 4

Which of the following is not a type of neuron on the retina

• photoreceptors

• internucrons( bipolar cells)

• ganglions

• purkineje cells

What do lens do?

• Regulate how much light enters into eyes by changing size of pupils

• Bend light so that it focuses on inner surface of eyeball

• Have neural sensory cells, like rods and cones, on it; senses light

• Pass on neural electric signals to occipital lobe.

True or False: Light must travel through ganglion cells and interneurons before it reaches photoreceptors.

• True

• False

Which part of the ganglion cell is making the optic nerve?

• dendrites

• axons

• soma

• synapse

There are how many photoreceptors are there in each human eye?

• 50 million

• 75 million

• 125 million

• 250 million