Arrange the Following Steps of Muscle Fiber Contraction in the Correct

question 26

Multiple Choice

Arrange the following steps of muscle fiber contraction in the correct sequence.
1) The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
2) Thin filaments are pulled over the thick filaments.
3) Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4) The impulse arrives at the synapse and travels through the transverse tubules.
5) The muscle fiber shortens and contracts.
6) Myosin heads bind to exposed active sites on actin,forming cross-bridges.

• A)6,3,1,4,2,5
• B)2,5,3,1,4,6
• C)4,1,3,6,2,5
• D)3,5,2,1,6,4

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Definitions:

Upward Counterfactuals

Hypothetical scenarios that individuals imagine which are better than what actually happened, often used in reflecting on past events.

Downward Counterfactual

Thinking about how a situation could have been worse, often leading to feelings of relief or contentment.

Upward Counterfactual

An imagined alternative in which the outcome is better than what actually happened.

Misinformation Effect

The phenomenon where people's memories of an event can be influenced by incorrect information presented after the event, leading to false recollections.