Explain the Functional Significance of the T-Tubules of the Sarcolemma

question 17

Multiple Choice

Explain the functional significance of the T-tubules of the sarcolemma and the terminal cisternae of the sarcoplasmic reticulum.

• A)The increased surface of both structures increases the speed and efficiency with which the end-plate potential leads to sarcomere contraction.
• B)The abundance of each structure increases the rate of ATP production.
• C)The T-tubules and terminal cisternae enhance the chemical attraction between myosin and actin.
• D)The increased surface area provides space for more ligand gated ion channels, thus increasing the effectiveness of acetylcholine binding.

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