Muscle Actions and Properties Quiz

What is the primary function of an agonist muscle during movement?

• To resist movement

• To initiate movement

• To stabilize a joint

• To provide sensory feedback

Which term describes the movement of a limb away from the midline of the body in the frontal plane?

• Adduction

• Abduction

• Flexion

• Extension

Identify the type of muscle contraction where the muscle length does not change.

• Isometric

• Isotonic

• Concentric

• Eccentric

Which of the following is a characteristic of muscle tissue that allows it to return to its original shape after being stretched?

• Extensibility

• Elasticity

• Contractility

• Excitability

Explain how the concept of hypertrophy is related to muscle growth.

• Hypertrophy is the decrease in muscle size due to inactivity.

• Hypertrophy is the increase in muscle size due to resistance training.

• Hypertrophy is the process of muscle fibers splitting.

• Hypertrophy is the loss of muscle elasticity.

Which muscle group is primarily responsible for plantarflexion of the foot?

• Quadriceps

• Hamstrings

• Gastrocnemius

• Deltoids

Describe the difference between concentric and eccentric muscle contractions.

• Concentric contractions lengthen the muscle, while eccentric contractions shorten it.

• Concentric contractions shorten the muscle, while eccentric contractions lengthen it.

• Both concentric and eccentric contractions shorten the muscle.

• Both concentric and eccentric contractions lengthen the muscle.

What is the significance of the origin and insertion points of a muscle?

• They determine the muscle's strength.

• They define the muscle's range of motion.

• They are the points where the muscle attaches to bone.

• They are the points where the muscle receives nerve signals.

Analyze how the structure of myofibrils contributes to muscle contraction.

• Myofibrils store energy for muscle contraction.

• Myofibrils contain actin and myosin filaments that slide past each other to produce contraction.

• Myofibrils are responsible for muscle relaxation.

• Myofibrils provide nutrients to muscle cells.

Evaluate the impact of atrophy on muscle function and performance.

• Atrophy increases muscle strength and endurance.

• Atrophy decreases muscle size and strength, leading to reduced performance.

• Atrophy has no effect on muscle function.

• Atrophy enhances muscle flexibility.