Which of the Following Statements About the Refractory Period of Neuronal

question 46

Multiple Choice

Which of the following statements about the refractory period of neuronal or muscle membranes is TRUE?

• A) In nerve cells, the absolute refractory period coincides with the period of increased K⁺ permeability.
• B) In skeletal muscle cells, the absolute refractory period lasts about as long as the twitch.
• C) In ventricular cells, the absolute refractory period coincides with the period of increased Na⁺ and Ca²⁺ permeability.
• D) The relative refractory period in neuronal membranes lasts about the same length of time as the absolute refractory period in cardiac muscle cell membranes.
• E) The refractory period in an alpha-motor neuron membrane is much briefer than the refractory period in a skeletal muscle cell membrane.

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Definitions:

Single-blind Experiment

An experimental design in which the participants do not know which group (experimental or control) they belong to, but the researchers do.

Debriefing Session

A meeting where participants or researchers discuss the procedures, findings, or experiences related to an experiment or event, often conducted after the conclusion of the event.

Practical Implications

The real-world effects or applications that stem from research findings or theoretical concepts.

Experimental

Relating to a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.