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Muscle Physiology Quiz: Sarcoplasm & Myofibrils

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Muscle Physiology Quiz: Sarcoplasm & Myofibrils

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@ClearQuatrain

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Questions and Answers

What primarily makes up the volume of the sarcoplasm in muscle cells?

Myofibrils (correct)

Ribosomes and mitochondria

Thick and thin filaments

Nuclei and Golgi apparatuses

Which type of muscle contains myofibrils as part of its contractile machinery?

All types of muscle

Smooth muscle only

Skeletal muscle and cardiac muscle (correct)

Cardiac muscle only

How are myofibrils structured within muscle cells?

Arranged in a circular formation

Randomly arranged throughout the cell

Bundled in parallel and running the entire length of the cell (correct)

Bundled in parallel and oriented vertically

Which of the following statements about thick and thin filaments is true?

<p>They contribute to the structure of myofibrils</p> Signup and view all the answers

What is the diameter of myofibrils in muscle cells?

<p>1 um</p> Signup and view all the answers

Study Notes

Sarcoplasm

Sarcoplasm is the cytoplasm of muscle cells
Sarcoplasm contains similar organelles as other cells such as nuclei, Golgi apparatus, ribosomes, and mitochondria
80% of the sarcoplasm is filled with myofibrils

Myofibrils

Myofibrils are long, thin, rod-like structures found in muscle cells
Myofibrils run the entire length of the muscle cell
Myofibrils are responsible for the contractile machinery of skeletal and cardiac muscle
Myofibrils consist of thick filaments and thin filaments

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Description

Test your knowledge on the structure and function of sarcoplasm and myofibrils in muscle cells. This quiz covers essential organelles found in sarcoplasm and the role of myofibrils in muscle contraction. Perfect for students learning about muscle physiology.