Podcast
Questions and Answers
Which type of motor unit is responsible for gross contractions in skeletal muscle?
Which type of motor unit is responsible for gross contractions in skeletal muscle?
- Small motor units
- Large motor units (correct)
- Motor units are not responsible for contractions
- Both large and small motor units
What is the main elimination method for acetylcholine (ACh) at the neuromuscular junction?
What is the main elimination method for acetylcholine (ACh) at the neuromuscular junction?
- Enzymatic degradation (correct)
- Reuptake
- Diffusion through the blood
- All of the above
Which receptors are involved in the end plate of skeletal muscle?
Which receptors are involved in the end plate of skeletal muscle?
- No receptors are involved
- Nicotinic 1 (N1 or Nm) (correct)
- Nicotinic 2 (N2 or Nn)
- Both N1 and N2 receptors
Which protein inhibits the binding site for myosin heads on actin filaments?
Which protein inhibits the binding site for myosin heads on actin filaments?
What is the function of Troponin I in the sarcomere?
What is the function of Troponin I in the sarcomere?
Which band in the sarcomere contains both thick and thin filaments?
Which band in the sarcomere contains both thick and thin filaments?
Which ion is released into the cytoplasm during excitation-relaxation coupling in skeletal muscle?
Which ion is released into the cytoplasm during excitation-relaxation coupling in skeletal muscle?
What is the role of acetylcholine (ACh) in excitation-relaxation coupling in skeletal muscle?
What is the role of acetylcholine (ACh) in excitation-relaxation coupling in skeletal muscle?
Where are nicotinic receptors located in skeletal muscle?
Where are nicotinic receptors located in skeletal muscle?
During muscle contraction, what happens to troponin-tropomyosin complex?
During muscle contraction, what happens to troponin-tropomyosin complex?
What is the role of ATP in muscle contraction?
What is the role of ATP in muscle contraction?
How is muscle relaxation achieved?
How is muscle relaxation achieved?
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