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10th -
12thgrade
6.2 Quiz: Microscopic Anatomy of Skeletal Muscles
10 questions
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- 1. Multiple Choice
What is shown in the image?
neuron
myelin sheath
segment of a muscle fiber
blood vessel
- 2. Multiple Choice
What is the arrow pointing at?
bare zone
thin filament
thick filament
myofibril
- 3. Multiple Choice
The plasma membrane of a skeletal muscle cell is called the:
sarcomere
centromere
sarcolemma
dilemma
- 4. Multiple Choice
What feature(s) gives skeletal muscle cells their striped appearance?
Dark (A) band
thin (actin) filament
thick (myosin) filament
Light (I) band
- 5. Multiple Choice
What is shown in the image?
myofibril
microfilaments
sarcoplasmic reticulum
cross bridges
- 6. Multiple Choice
Tiny contractile units that make up myofibrils are called:
sarcolemma
cross bridges
myosin
sarcomeres
- 7. Multiple Choice
There are two types of threadlike protein ______________________ within each of our "boxcar" sarcomeres.
cross bridges
myofilaments
microfilaments
sarcoplasmic reticulum
- 8. Multiple Choice
What feature of skeletal muscles "link the thick and thin filaments together during contraction"?
myosin
actin
cross bridges
sarcomeres
- 9. Multiple Choice
What feature of myofilaments is shown at the green arrow?
thick filaments, myosin
cross bridges
bare zone
thin filaments, actin
- 10. Multiple Choice
What feature of myofilaments is shown at the red arrow?
cross bridges
thick filaments, myosin
thin filaments, actin
bare zone
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