Science 2023

Which part of the eye converts light into an electrochemical signal?

• a. the cornea

• b. the pupil

• c. the optic disk

• d. the lens

• e. the retina

Which of the following parts of the eye controls most of the eye’s refraction?

• a. the optic disk

• b. the lens

• c. the pupil

• d. the retina

• e. the cornea

How many types of cones are present in primates?

• a. one

• b. six

• c. five

• d. three

• e. two

Which part of the ear amplifies sound waves to transfer them to the thicker fluid of the inner ear?

• a. cochlea

• b. tympanic membrane

• c. auditory canal

• d. ossicles

• e. pinna

Which part of the ear converts sound waves into physical movements in the middle ear?

• a. tympanic membrane

• b. auditory canal

• c. cochlea

• d. pinna

• e. semicircular canals

The two main sections of the inner ear are the cochlea and the

• a. semicircular canals

• b. saccule

• c. eustachian tube

• d. helix

• e. utricle

What is the function of the cochlea in the inner ear?

• a. maintenance of balance

• b. transduction of sound

• c. detection of head movements

• d. protection of the inner ear structures

• e. amplification of sound waves

The rods and cones use different pigments or opsins to absorb light of different _________________.

• a. intensity 

• b. temperature

• c. amplitude

• d. brightness

• e. wavelength

Which of the following can activate an opsin?

• a. X-ray 

• b. rhodopsin

• c. light

• d. cGMP

• e. phosphodiesterase

Inside the cochlea, the

• a. ear drum moves as the sound waves strike it

• b. vibrations of a liquid cause fine hairs attached to nerve cells to vibrate

• c. brain converts sounds to spoken words

• d. brain decodes sounds to give them meaning

• e. ear helps us keep our balance