1.The combined function of the malleus, incus, and stapes is to ____. amplify th

Question

1.The combined function of the malleus, incus, and stapes is to ____.

amplify the vibrations of the ear drum

2. The pitch of a sound depends on the ____of the sound wave.

3. Some animals, like humans, have two eyes on the front of the head that perceive a mostly overlapping visual field. In contrast, some herbivores (rabbits, for example) have eyes on the sides of their head and visual fields that may not overlap at all. How does this impact perception of the environment?

Humans have better depth perception and a wider field of vision than rabbits.

4.In the process of lateral inhibition, ____ inhibit distant bipolar cells.

Explanation / Answer

1. Answer : convert the mechanical vibration of the tympanic membrane into a pressure wave in the cochlear duct.

Outer ear is separated from middle ear by tympanic membrane or ear drum. Sound waves from the outer ear hits the ear drum which then vibrates and it is transmitted by middle ear (malleus, incus, and stapes) to inner ear (cochlea)

2. Answer : Frequency

More vibrations of the substance or particle = More frequency = Higher pitch

Less vibrations of the substance or particle = Less frequency = Lower pitch

3. Answer : Humans have better depth perception and a narrower field of vision than rabbits.

Rabbits have 360 degree and have a higher ratio of rods than cones

4. Answer : horizontal cells

When a rod or cone stimulates a horizontal cell it inhibits more-distant photoreceptors and bipolar cells creating lateral inhibition. Lateral inhibition enhances light and dark contrast in images.

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