PPL Human Factors 2

Which of the following describe the rods? Choose all that apply:

• Colour sensitive

• High acuity

• Light sensitive

• Bundled nerve connection to nerve fibre

Which has over 100 million cells per eye?

• Rods

• Cones

Which of the following describe the function of the cones? Choose all that apply:

• Colour sensitive

• Used for direct vision

• Used for peripheral vision

• 1:1 ratio of nerve connection to nerve fibre

What process first happens with dark adaptation?

• Iris closes to let more light in

• Cones shut down

• Pupil enlarges to take in more light

• Rods shut down

Which part of the eye is also known as the 'blind spot'?

• Fovea centralis

• Retina

• Ciliary body

• Optic nerve

What is correct in regards to the retina?

• It adjusts size depending on the levels of light

• Used to focus the light rays coming in

• Is the point also known as 'blind spot'

• Is where the cones and rods are found

What part of the ear senses both head/body tilt and linear acceleration?

• Cochlea

• Otolith organs

• Ossicles

• Stapes

Approximately how many cone cells are in each eye?

• 1 bil

• 7 bil

• 70 mil

• 6 mil

Which of the following is used for hearing as opposed to balance? Choose all that apply:

• Otolith organs

• Cochlea

• Ossicles

• Semicircular canals

Where is the tympanic membrane found?

• Inner ear

• Middle ear

• Outer ear