6 Questions
What is the functional contractile unit of a myofibril?
Sarcomere
Which organelle is abundantly found in the sarcoplasm of skeletal muscle fibers?
Smooth endoplasmic reticulum
What gives rise to the dark areas known as Cohnheim's areas in the sarcoplasm?
Myofibrils
Which component of the myofibril is responsible for the cross striation seen by light microscopy?
Dark band (A-band)
What type of muscle fiber is described as having peripherally situated nuclei?
Skeletal muscle fiber
Which pigment is commonly found in the sarcoplasm of skeletal muscle fibers?
Myoglobin
This quiz covers the anatomy of skeletal muscle fibers, including their appearance under light microscopy, transmission electron microscopy, and transverse sections. Topics include nuclei arrangement, striations, sarcoplasm composition, and Cohnheim's areas.
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