When Walking,Lisa,an Eighteen Year-Old Who Is Blind,has Learned to Attend

question 41

Multiple Choice

When walking,Lisa,an eighteen year-old who is blind,has learned to attend to the subtle changes in pitch of echoes from objects as she moves towards them.Which phenomenon is responsible for these changes?

• A)obstacle sense
• B)Doppler effect
• C)echolalia
• D)tactual perception

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Definitions:

Organelle of Locomotion

Cellular structures that enable movement in organisms, such as cilia and flagella.

Flagellum

A long, whip-like appendage that enables many bacteria, sperm cells, and other organisms to swim and move.

Ciliated Cells

Cells that have fine hair-like projections on their surface, which move in unison to transport substances or debris across the cell surface.

Columnar Cells

Elongated cells resembling columns, often found lining organs like the intestines and respiratory tract, where they might secrete or absorb substances.