Which of the Following Is the Correct Sequence That Describes

question 86

Multiple Choice

Which of the following is the correct sequence that describes the excitation and contraction of a skeletal muscle fibre? 1. Tropomyosin shifts and unblocks the cross-bridge binding sites.
2. Calcium is released and binds to the troponin complex.
3. Transverse tubules depolarize the sarcoplasmic reticulum.
4. The thin filaments are ratcheted across the thick filaments by the heads of the myosin molecules using energy from ATP.
5. An action potential in a motor neuron causes the axon to release acetylcholine, which depolarizes the muscle cell membrane.

• A)1 → 2 → 3 → 4 → 5
• B)2 → 1 → 3 → 5 → 4
• C)2 → 3 → 4 → 1 → 5
• D)5 → 3 → 1 → 2 → 4
• E)5 → 3 → 2 → 1 → 4

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Definitions:

Control Group

In experimental research, the group that does not receive the treatment or intervention, serving as a comparison for measuring the effect of the treatment.

Experimenter Bias

The unintentional influence that a researcher can have on the results of a study, due to subjective expectations or desires regarding the outcome.

Self-Report Bias

A form of bias that occurs when respondents do not answer questions accurately due to misunderstanding, embarrassment, or deliberate falsehood.

Research Design

The overall strategy that outlines how to conduct research, defining how data is collected, measured, and analyzed.