Podcast
Questions and Answers
Which of the following is NOT a component of a sarcomere?
Which of the following is NOT a component of a sarcomere?
- A bands
- I bands
- M lines (correct)
- Z lines
What is the role of troponin in muscle contraction?
What is the role of troponin in muscle contraction?
- Troponin binds to actin
- Troponin binds to tropomyosin
- Troponin binds to myosin
- Troponin binds to calcium ions (correct)
Which of the following is a marker for total muscle breakdown?
Which of the following is a marker for total muscle breakdown?
- Cardiac TnI
- Total TnI (correct)
- Troponin C
- Troponin I
Which ion is involved in the excitation-contraction coupling in muscle cells?
Which ion is involved in the excitation-contraction coupling in muscle cells?
Which of the following is NOT a type of muscle fiber?
Which of the following is NOT a type of muscle fiber?
What is the process called when myosin breaks down ATP during muscle contraction?
What is the process called when myosin breaks down ATP during muscle contraction?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
Which type of muscle fiber has a lower myoglobin content and relies more on glycolysis for energy production?
Which type of muscle fiber has a lower myoglobin content and relies more on glycolysis for energy production?
Which type of muscle fiber has a slower contraction rate and higher fatigue resistance?
Which type of muscle fiber has a slower contraction rate and higher fatigue resistance?
Which type of muscle fiber has a larger diameter and fewer mitochondria?
Which type of muscle fiber has a larger diameter and fewer mitochondria?
Which type of muscle fiber is primarily used in activities requiring endurance, such as long-distance running?
Which type of muscle fiber is primarily used in activities requiring endurance, such as long-distance running?
Which type of muscle fiber is primarily used in activities requiring short bursts of power, such as sprinting?
Which type of muscle fiber is primarily used in activities requiring short bursts of power, such as sprinting?
What is the main difference between isometric and isotonic muscle contractions?
What is the main difference between isometric and isotonic muscle contractions?
Which type of muscle fibers are responsible for fine gradation of force for small movements?
Which type of muscle fibers are responsible for fine gradation of force for small movements?
What is the function of the patellar reflex?
What is the function of the patellar reflex?
Which type of muscle fibers detect stretch and length of the central non-contracting region using stretch receptors?
Which type of muscle fibers detect stretch and length of the central non-contracting region using stretch receptors?
What happens when there is absence of the patellar reflex?
What happens when there is absence of the patellar reflex?
Which reflex protects the muscle from overloading and can lead to muscle force decrease?
Which reflex protects the muscle from overloading and can lead to muscle force decrease?
What is the function of the Golgi Tendon Organ?
What is the function of the Golgi Tendon Organ?
What happens in upper motor neuron disease?
What happens in upper motor neuron disease?
What is the role of lower motor neurons?
What is the role of lower motor neurons?
What is the relationship between neural drive and force generation?
What is the relationship between neural drive and force generation?
Which of the following is true about the mechanism of muscle contraction at the molecular level?
Which of the following is true about the mechanism of muscle contraction at the molecular level?
Which of the following is true about force generation in muscle fibers?
Which of the following is true about force generation in muscle fibers?
Which of the following is true about the cross-bridge cycle in muscle contraction?
Which of the following is true about the cross-bridge cycle in muscle contraction?
Which of the following is true about rigor mortis?
Which of the following is true about rigor mortis?
Which of the following is true about creatine and creatinine?
Which of the following is true about creatine and creatinine?
Which of the following is true about calcium in muscle contraction?
Which of the following is true about calcium in muscle contraction?
Which of the following is true about tetany in muscle contraction?
Which of the following is true about tetany in muscle contraction?
Which molecule determines whether actin-myosin interaction can occur in skeletal muscle?
Which molecule determines whether actin-myosin interaction can occur in skeletal muscle?
What is the role of tropomyosin in muscle contraction?
What is the role of tropomyosin in muscle contraction?
What is the function of troponin C in skeletal muscle?
What is the function of troponin C in skeletal muscle?
What is the mechanism of muscle contraction at the molecular level?
What is the mechanism of muscle contraction at the molecular level?
Which type of muscle contraction is voluntary?
Which type of muscle contraction is voluntary?
What is the main difference between skeletal muscle and cardiac muscle?
What is the main difference between skeletal muscle and cardiac muscle?
What is the function of motor units in muscle contraction?
What is the function of motor units in muscle contraction?
What is the role of calcium in muscle contraction?
What is the role of calcium in muscle contraction?
Which molecule is responsible for holding high energy phosphate bonds in muscle fibers?
Which molecule is responsible for holding high energy phosphate bonds in muscle fibers?
What happens to muscle force when the actin filaments start getting in the way of each other?
What happens to muscle force when the actin filaments start getting in the way of each other?
What is the role of ATP in muscle contraction?
What is the role of ATP in muscle contraction?
What is the condition called when the cross bridge cycle gets stuck in the state where myosin has grabbed onto actin and can no longer release it?
What is the condition called when the cross bridge cycle gets stuck in the state where myosin has grabbed onto actin and can no longer release it?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
What is the main difference between slow twitch and fast twitch muscle fibers?
What is the main difference between slow twitch and fast twitch muscle fibers?
Which type of muscle fiber is primarily used in activities requiring short bursts of power, such as sprinting?
Which type of muscle fiber is primarily used in activities requiring short bursts of power, such as sprinting?
What is the relationship between muscle fibers and motor units?
What is the relationship between muscle fibers and motor units?
What is the role of the L type calcium channels in muscle contraction?
What is the role of the L type calcium channels in muscle contraction?
What happens when the calcium release channels open in muscle cells?
What happens when the calcium release channels open in muscle cells?
What is the role of the sarcoplasmic reticulum in muscle contraction?
What is the role of the sarcoplasmic reticulum in muscle contraction?
What is the relationship between calcium concentration in the sarcoplasmic reticulum and the cytosol?
What is the relationship between calcium concentration in the sarcoplasmic reticulum and the cytosol?
Which of the following is true about creatine and creatinine?
Which of the following is true about creatine and creatinine?
What is the role of troponin in muscle contraction?
What is the role of troponin in muscle contraction?
What is the main difference between isometric and isotonic muscle contractions?
What is the main difference between isometric and isotonic muscle contractions?
Which of the following is true about force generation in muscle fibers?
Which of the following is true about force generation in muscle fibers?
Which type of muscle fiber is primarily used for activities requiring endurance, such as long-distance running?
Which type of muscle fiber is primarily used for activities requiring endurance, such as long-distance running?
Which type of muscle fiber has a slower contraction rate and higher fatigue resistance?
Which type of muscle fiber has a slower contraction rate and higher fatigue resistance?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
Which type of muscle fiber has a higher myoglobin content and many mitochondria?
What is the role of the Golgi Tendon Organ?
What is the role of the Golgi Tendon Organ?
What is the function of the patellar reflex?
What is the function of the patellar reflex?
What is the main difference between isometric and isotonic muscle contractions?
What is the main difference between isometric and isotonic muscle contractions?
Which of the following is the correct order of muscle structures from largest to smallest?
Which of the following is the correct order of muscle structures from largest to smallest?
How many thin filaments are adjacent to one thick filament?
How many thin filaments are adjacent to one thick filament?
How many thick filaments are adjacent to one thin filament?
How many thick filaments are adjacent to one thin filament?
Which bands become shorter during contraction in the sarcomere?
Which bands become shorter during contraction in the sarcomere?
Which of the following proteins reside on thin filaments?
Which of the following proteins reside on thin filaments?
What is the basis of the striations in skeletal muscle?
What is the basis of the striations in skeletal muscle?
Which of the following is true about the size principle in muscle activity?
Which of the following is true about the size principle in muscle activity?
Which of the following is an example of eccentric contraction of muscle?
Which of the following is an example of eccentric contraction of muscle?
What is the difference between isotonic and isometric force generation?
What is the difference between isotonic and isometric force generation?
What is the difference between the stretch reflex and the tendon reflex?
What is the difference between the stretch reflex and the tendon reflex?
Which of the following muscles would you expect to have a predominance of slow twitch fibers?
Which of the following muscles would you expect to have a predominance of slow twitch fibers?
What happens during isometric force generation?
What happens during isometric force generation?
Which of the following is true about slow twitch muscle fibers?
Which of the following is true about slow twitch muscle fibers?
Which of the following is true about fast twitch muscle fibers?
Which of the following is true about fast twitch muscle fibers?
What is the main difference between a motor unit and a muscle fiber?
What is the main difference between a motor unit and a muscle fiber?
Which of the following is true about slow twitch muscle fibers?
Which of the following is true about slow twitch muscle fibers?
Which of the following is true about fast twitch muscle fibers?
Which of the following is true about fast twitch muscle fibers?
What is the main difference between a motor unit and a muscle fiber?
What is the main difference between a motor unit and a muscle fiber?
Which of the following is true about the molecular mechanism of muscle contraction in skeletal muscle?
Which of the following is true about the molecular mechanism of muscle contraction in skeletal muscle?
What is the role of tropomyosin in skeletal muscle contraction?
What is the role of tropomyosin in skeletal muscle contraction?
What is the main difference between skeletal muscle troponin and cardiac muscle troponin?
What is the main difference between skeletal muscle troponin and cardiac muscle troponin?
What is the molecular mechanism for the reduction in force when a sarcomere is stretched beyond optimal?
What is the molecular mechanism for the reduction in force when a sarcomere is stretched beyond optimal?
What is the molecular mechanism for the increase in force when a sarcomere is contracted beyond optimal?
What is the molecular mechanism for the increase in force when a sarcomere is contracted beyond optimal?
What happens to the cross-bridge cycle when there is no ATP available?
What happens to the cross-bridge cycle when there is no ATP available?
Which of the following is true about the role of calcium in muscle contraction?
Which of the following is true about the role of calcium in muscle contraction?
What is the main difference between skeletal muscle and smooth muscle?
What is the main difference between skeletal muscle and smooth muscle?
What is the function of troponin in muscle contraction?
What is the function of troponin in muscle contraction?
What is the role of the sarcoplasmic reticulum in muscle contraction?
What is the role of the sarcoplasmic reticulum in muscle contraction?
What is the function of the Golgi Tendon Organ?
What is the function of the Golgi Tendon Organ?
What is the difference between isometric and isotonic muscle contractions?
What is the difference between isometric and isotonic muscle contractions?
