Match the following structures to their functions: Myofibrils | Houses calcium release channels, Sarcoplasmic Reticulum | Transmits action potentials, T-Tubules | Conducts muscle c... Match the following structures to their functions: Myofibrils | Houses calcium release channels, Sarcoplasmic Reticulum | Transmits action potentials, T-Tubules | Conducts muscle contraction through myofilaments, Sarcolemma | Encapsulates muscle fibers and regulates ion entry.
Understand the Problem
The question is asking to match specific structures related to muscle physiology with their corresponding functions, highlighting the role each structure plays in muscle contraction and signaling.
Answer
Myofibrils – Conducts contraction, Sarcoplasmic Reticulum – Houses calcium channels, T-Tubules – Transmits action potentials, Sarcolemma – Encapsulates fibers.
Myofibrils – Conducts muscle contraction through myofilaments, Sarcoplasmic Reticulum – Houses calcium release channels, T-Tubules – Transmits action potentials, Sarcolemma – Encapsulates muscle fibers and regulates ion entry.
Answer for screen readers
Myofibrils – Conducts muscle contraction through myofilaments, Sarcoplasmic Reticulum – Houses calcium release channels, T-Tubules – Transmits action potentials, Sarcolemma – Encapsulates muscle fibers and regulates ion entry.
More Information
These structures play key roles in muscle contraction. The sarcoplasmic reticulum releases calcium to facilitate contraction, T-tubules help propagate action potentials, myofibrils contract the muscle using myofilaments, and the sarcolemma regulates ions and transmits electrical signals.
Tips
A common mistake is confusing the roles of the sarcolemma and T-tubules in transmitting action potentials; ensure to understand that T-tubules carry action potentials into the muscle fibers.
Sources
- 19.4 Muscle Contraction and Locomotion – Concepts of Biology - opentextbc.ca
- 6.4: Muscle Contraction - Biology LibreTexts - bio.libretexts.org
- 10.2 Skeletal Muscle – Anatomy & Physiology - open.oregonstate.education
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