HSC 308 Exam 1 Practice Questions and Answers – Updated 2024
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Course
2024/2025
Institution
2024/2025
HSC 308 Exam 1 Practice Questions and
Answers – Updated 2024
What are the three types of muscle tissue? - Answer-Smooth
Cardiac
Skeletal
Smooth muscle is: - Answer-involuntary, hollow organs, blood vessels
Cardiac Muscle is: - Answer-involuntary, found in the heart
Skeletal muscle is: - An...
5. Triggers Ca2+ release from sarcoplasmic reticulum (SR)
6. Ca2+ endables actin-myosin contraction
Role of Ca2+ in Muscle Contraction - Answer✔✔-Binds to troponin on thin filament which can
then move tropomyosin
At rest, tropomyosin covers: - Answer✔✔-Myosin binding site, blocking the actin-myosin
attraction
When myosin binds to actin, - Answer✔✔-contraction can occur
Role of ATP in Muscle Contraction - Answer✔✔-Binds to myosin head
Energy released when ATP breaks facilitates: - Answer✔✔-myosin's movement to a new actin
molecule
When the action potential ends, - Answer✔✔-electrical stimulation of SR stops
Ca2+ is pumped back into SR - Answer✔✔-stored until next AP arrives
requires ATP
Without Ca2+, troponin and tropomyosin returns to: - Answer✔✔-resting conformation
Covers myosin binding site
Prevents actin-myosin cross bridging
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