Humber Admissions Practice Test

What type of motion do cilia typically facilitate?

1. Cell division

2. Locomotion

3. Energy production

4. Protein synthesis

The correct answer is: Locomotion

Cilia are specialized hair-like structures that extend from the surface of many cells. They play a crucial role in facilitating movement, particularly in the context of locomotion. In organisms such as single-celled protists and certain animal cells, cilia can help propel the cell through its environment by beating in a coordinated manner, creating a wave-like motion that moves the cell forward. In addition to their role in locomotion, cilia also serve other important functions, such as moving fluids or particles across the cell surface, but their primary and most recognized function is indeed related to movement. This ability to facilitate locomotion distinguishes cilia from other cellular structures, which are involved in processes like energy production or protein synthesis. Therefore, understanding the function of cilia helps clarify their significance in various biological contexts, particularly in motility and fluid dynamics.