Question

tonotopic organization of the cochlea means:

middle cochlea responds to mid frequencies only
base responds to high frequencies, apex to low
apex responds to high frequencies, base to low
entire cochlea responds equally

Explanation:

Define tonotopic organization

Tonotopic organization is the spatial mapping of sound frequencies along the basilar membrane.

Analyze cochlear physical properties

The basilar membrane varies in stiffness and width from base to apex.

Determine frequency response

The narrow, stiff base vibrates to high frequencies; the wide, floppy apex vibrates to low frequencies.

Match with options

The second option correctly states: "Base responds to high frequencies, apex to low".

Answer:

• Middle cochlea responds to mid frequencies only
• Base responds to high frequencies, apex to low (Correct answer)
• Apex responds to high frequencies, base to low
• Entire cochlea responds equally