What Happens to Miniature Endplate Potentials (MEPPs) Recorded at the Frog

question 45

Multiple Choice

What happens to miniature endplate potentials (mEPPs) recorded at the frog neuromuscular junction after acetylcholinesterase is blocked by prostigmine?

• A) mEPPs decrease in amplitude.
• B) mEPPs increase in amplitude and time course.
• C) mEPPs do not change in amplitude or time course.
• D) mEPPs increase in frequency
• E) mEPPs do not occur.

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Definitions:

Fluid

A substance that has fluidity; that is, it lacks definite shape and both flows readily and yields to the slightest pressure. Most liquids and gases are fluids.

Gases

Substances that exist in a state that fills any container uniformly, without a definite shape or volume, such as oxygen or nitrogen.

Vapors

Gaseous forms of substances which are liquid or solid at room temperature, often produced by evaporation or sublimation.

Prime Mover

The initial mechanical source of motive power. In the context of a hydraulic circuit, the means used to drive the hydraulic pump would be properly the prime mover, although the term is sometimes used to describe the pump itself.