Which of the Following Is the Correct Sequence That Describes

question 58

Multiple Choice

Which of the following is the correct sequence that describes the excitation and contraction of a skeletal muscle fiber?
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

---

Definitions:

Farm Incomes

The earnings obtained from agricultural activities, reflecting the financial health and productivity of farms.

Proportionate Increases

Situations where variables increase by the same percentage, maintaining their relative proportion to one another.

Demand

The quantity of a good or service that consumers are willing and able to purchase at various prices during a specified time period.

Agricultural Products

Goods produced through farming and agriculture, such as crops and livestock.