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Questions and Answers
What is primarily affected by Duchenne muscular dystrophy (DMD) due to its inheritance as an X-linked recessive trait?
What is primarily affected by Duchenne muscular dystrophy (DMD) due to its inheritance as an X-linked recessive trait?
- Parents
- Boys (correct)
- Both boys and girls
- Girls
What is the membranous smooth ER in skeletal muscle fibers known as in this context?
What is the membranous smooth ER in skeletal muscle fibers known as in this context?
- Lysosome
- Golgi apparatus
- Nucleus
- Sarcoplasmic reticulum (correct)
What triggers the release of calcium from the cisternae of the sarcoplasmic reticulum in skeletal muscle fibers?
What triggers the release of calcium from the cisternae of the sarcoplasmic reticulum in skeletal muscle fibers?
- Protein synthesis
- Membrane depolarization produced by a motor nerve (correct)
- Mitochondrial activity
- ATP synthesis
What is responsible for producing uniform contraction of all myofibrils in a muscle fiber?
What is responsible for producing uniform contraction of all myofibrils in a muscle fiber?
True or False: In skeletal muscle fibers, the lengths of actin and myosin filaments change during contraction.
True or False: In skeletal muscle fibers, the lengths of actin and myosin filaments change during contraction.
What happens to the H band during muscle contraction?
What happens to the H band during muscle contraction?
What is the complex formation of a T-tubule with two terminal cisternae of sarcoplasmic reticulum known as in longitudinal TEM sections?
What is the complex formation of a T-tubule with two terminal cisternae of sarcoplasmic reticulum known as in longitudinal TEM sections?
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