Understanding Muscle Contractions and Pairs

Pick the isometric contraction

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Which of the following is an example of an antagonistic muscle pair?

• Biceps and triceps

• Quadriceps and hamstrings

• Deltoids and pectorals

• Gastrocnemius and soleus

What type of muscle contraction occurs when the muscle length remains constant while tension increases?

• Isotonic contraction

• Isometric contraction

• Concentric contraction

• Eccentric contraction

Which of the following best describes isotonic contractions?

• Muscle tension changes, but muscle length remains the same

• Muscle length changes, but muscle tension remains the same

• Muscle length and tension both change

• Muscle neither lengthens nor shortens

What is the primary characteristic of slow-twitch muscle fibres?

• High force production

• Fatigue quickly

• High endurance

• Low oxygen supply

Which type of muscle fibre is most suited for sprinting?

• Type I

• Type IIa

• Type IIb

• Type III

During a bicep curl, what type of contraction occurs when lowering the weight?

• Concentric contraction

• Isometric contraction

• Eccentric contraction

• Isotonic contraction

Which muscle acts as the antagonist when the quadriceps are the agonist?

• Hamstrings

• Gastrocnemius

• Soleus

• Gluteus maximus

What is the main function of fast-twitch muscle fibres?

• Endurance activities

• High-intensity, short-duration activities

• Maintaining posture

• Low-intensity, long-duration activities

Which of the following is NOT a type of muscle contraction?

• Isometric

• Isotonic

• Concentric

• Hypertonic