Understanding Muscle Contractions

What is the only action muscles can perform?

• Rotate

• Expand

• Pull

• Push

What type of isotonic contraction occurs when a muscle shortens under tension?

• Isotonic eccentric

• Isokinetic

• Isometric

• Isotonic concentric

During an isotonic eccentric contraction, what happens to the muscle?

• It remains the same length

• It lengthens under tension

• It shortens

• It contracts without movement

What does an isometric contraction involve?

• Muscle staying the same length

• Rapid muscle movement

• Muscle shortening

• Muscle lengthening

Which type of contraction does not involve movement of the muscle length?

• Isotonic concentric

• Isotonic eccentric

• Isometric

• Isokinetic

In the context of throwing a football, what type of contraction does the bicep brachii perform?

• Isokinetic

• Isometric

• Isotonic eccentric

• Isotonic concentric

What action does the tricep brachii perform during the extension phase of throwing?

• Isometric

• Isokinetic

• Isotonic eccentric

• Isotonic concentric

What type of contraction is primarily used in activities that involve lowering the body or objects?

• Isotonic concentric

• Isotonic eccentric

• Isometric

• Isokinetic

Which muscles contract isometrically to maintain a stationary position?

• Only the prime mover

• Only the antagonist

• Neither, as muscles cannot contract isometrically

• Both in the antagonistic pair

What principle is applied when two muscles contract isometrically against each other to maintain a position?

• Principle of moments

• Principle of isotonic balance

• Principle of dynamic movement

• Principle of flexibility