18 Questions
What is the primary function of Titin in muscle contraction?
To act as a molecular spring
What is the term for the ability of muscles to respond to chemical signals, stretch, or other signals?
Responsiveness
What is the purpose of T-tubules in muscle fibers?
To help propagate action potentials
What is the term for the group of muscle fibers innervated by a single motor neuron?
Motor unit
What is the primary component of thick filaments in muscle myofibrils?
Myosin
What is the function of Nebulin in muscle structure?
To act as a molecular ruler
What is the primary function of Troponin C in muscle contraction?
Binds to Ca2+
What is the role of the neuromuscular junction in muscle contraction?
Initiates muscle contraction
What is the composition of a motor unit?
One motor neuron and multiple muscle fibers of the same type
What is the result of the binding of Acetylcholine to its receptor on the muscle fiber?
Entry of Na+ into the sarcoplasm
What is required for muscle contraction to occur?
Nerve impulse only
What is the function of Acetylcholinesterase in neuromuscular transmission?
Degradates Acetylcholine
What is the primary function of skeletal muscles in maintaining body posture?
Maintaining standing position and body position
What is the term for the process by which a motor neuron stimulates muscle contraction?
Neuromuscular transmission
What is the basic functional unit of skeletal muscle contraction?
Motor unit
What is the term for the repeating unit of muscle contraction?
Sarcomere
What is the name of the structure that contains the contractile units of muscle cells?
Myofibril
What is the process by which skeletal muscles regulate body temperature?
Muscle contraction
Test your understanding of muscle characteristics, including responsiveness, conductivity, contractility, extensibility, and elasticity. Learn about the universal properties of muscles and how they respond to stimulation. This quiz is perfect for MBChB students studying muscle physiology.
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