Muscular System
Biology ⇒ Human Biology
Muscular System starts at 6 and continues till grade 12.
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See sample questions for grade 11
A patient is experiencing muscle weakness due to a lack of acetylcholine receptors at the neuromuscular junction. What is the likely effect on muscle contraction?
Describe the difference between isotonic and isometric muscle contractions.
Describe the main differences between skeletal, cardiac, and smooth muscle tissues.
Describe the role of ATP in muscle contraction.
Describe the role of creatine phosphate in muscle contraction.
Explain the role of calcium ions in muscle contraction.
Explain the sliding filament theory of muscle contraction.
Explain why cardiac muscle cells are able to contract in a coordinated manner.
Explain why muscles need a constant supply of oxygen during prolonged exercise.
Name the neurotransmitter that is released at the neuromuscular junction to stimulate muscle contraction.
Name two functions of skeletal muscles besides movement.
What is the main function of myoglobin in muscle cells?
Which muscle type is responsible for peristalsis in the digestive tract?
A patient presents with muscle stiffness and spasms. Laboratory tests reveal a deficiency in the enzyme acetylcholinesterase. Explain how this deficiency affects muscle contraction and relaxation.
Describe how the length-tension relationship affects the force generated by a skeletal muscle.
During intense physical activity, muscle cells switch from aerobic to anaerobic respiration. Explain the biochemical consequences of this switch and its impact on muscle performance.
Explain the physiological basis of rigor mortis and why it occurs after death.
Explain the role of satellite cells in muscle repair and growth.
A long-distance runner and a weightlifter have different muscle fiber compositions. Explain how the proportion of slow-twitch and fast-twitch fibers in their muscles contributes to their athletic performance.
A patient is diagnosed with a genetic disorder that affects the production of dystrophin, a protein associated with the muscle cell membrane. Describe the likely impact of this disorder on muscle function and explain why.
