You Are Working with Some New Neural Cells and Accidentally

question 24

Multiple Choice

You are working with some new neural cells and accidentally spill a few drops of a chemical solution into the petri dish. Shortly afterwards, you notice an increase in graded potentials in the cells. You hypothesize that the channels responsible for these graded potentials are

• A) ligand-gated
• B) leak channels
• C) mechanically-gated
• D) voltage-gated

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Definitions:

Biological Clock

An innate mechanism in living organisms that controls the timing of behaviors and physiological processes.

Circadian Clock

An internal biological clock regulating the sleep-wake cycle and other physiological processes on roughly a 24-hour cycle.

Internal Clock

An innate mechanism that regulates physiological and behavioral functions in a roughly 24-hour cycle, also known as the circadian rhythm.

Pineal Gland

A small endocrine gland in the brain, secreting melatonin and involved in regulating sleep patterns.