12 Questions
What percentage of the body is comprised of skeletal muscle?
40%
What is the primary function of skeletal muscle in terms of locomotion?
Facilitating movement and breathing
What is required for skeletal muscle to contract?
Depolarization
Where does the axon terminal lie in the neuromuscular junction?
In the synaptic gutter
What is the role of Ca++ in neuromuscular transmission?
Facilitating acetyl choline release
What is the result of acetyl choline binding to its receptors on the end plate membrane?
End plate depolarization
What is the primary function of acetyl choline esterase in neuromuscular transmission?
To degrade acetyl choline rapidly, preventing multiple muscle contraction
What is the delay time needed for acetyl choline release, inflow of Na+, and depolarization to firing level?
0.5 msec
Which ion increases neuromuscular transmission?
Ca++
What is the characteristic of neuromuscular transmission?
It is unidirectional, from nerve to muscle
What is the cause of Myasthenia Gravis?
Presence of curare-like substance in the blood
What is the treatment for Myasthenia Gravis?
Anticholine esterase inhibitors
Test your knowledge of skeletal muscle functions, including locomotion, posture, and heat production, as well as its structure and neuromuscular transmission. Learn how skeletal muscles contract and receive nerve impulses.
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