Using Phase Contrast Microscopy on a Wet Mount of Live

question 76

Multiple Choice

Using phase contrast microscopy on a wet mount of live cells, you observe motile bacilli moving rapidly and randomly through the field of view, changing directions after a brief tumble and taking off in a different direction. These cells are exhibiting ________ motility.

• A) twitching
• B) swimming
• C) gliding
• D) twitching or gliding

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Definitions:

Receptor

A protein molecule that receives and responds to chemical signals from hormones, neurotransmitters, or other stimuli outside the cell.

Vestibulocochlear

Pertaining to the vestibulocochlear nerve, the eighth cranial nerve, which is responsible for transmitting sound and equilibrium (balance) information from the inner ear to the brain.

Accessory

Relating to additional or auxiliary components or structures, often used to describe nerves or muscles that supplement a primary function.

Integration Center

In the nervous system, a region where information is processed and interpreted, leading to an appropriate response to stimuli.