12 Questions
What type of muscle contraction involves the muscle shortening as it creates tension?
Concentric
Which type of muscle fiber has a primary energy system of oxidative and is recruited during lower intensity activities lasting 2 minutes or more?
Type I
In the sliding filament theory, what molecule binds to troponin causing tropomyosin to move away from the myosin binding sites on actin?
Calcium
What type of muscle fiber has a white color, fast contraction speed, and is recruited during high to very high-intensity activities lasting 1-10 seconds?
Type llx
Which type of muscle contraction involves the muscle length not changing, as the contractile force equals the resistive force?
Isometric
What is the main reason ATP is crucial in muscle contraction according to the provided text?
To allow the process of muscle contraction to repeat
Which directional term refers to a position in a limb that is nearer to the point of attachment or trunk?
Proximal
What directional term indicates a position in a limb that is farther from the point of attachment or trunk?
Distal
Which term describes the movement that involves bending a joint and decreasing the angle between two body parts?
Flexion
When a body part is moved backward, which plane of movement is primarily involved?
Frontal Plane
Which term refers to the middle direction toward the middle of the body?
Medial
What type of movement involves bending the foot downward at the ankle joint?
Plantar flexion
Test your knowledge on the steps leading up to the sliding filament theory, the role of alpha motor neurons, myelin sheath, calcium, and ATP in muscle contractions. Understand the importance of ATP in the sliding filament theory process.
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