MCQ 41
Which part of the brain is primarily involved in coordinating movement?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Thalamus
Answer: B) Cerebellum
Explanation: The cerebellum coordinates voluntary movements and maintains posture and balance.
MCQ 42
What is the primary effect of muscle hypertrophy?
A) Increase in muscle length
B) Increase in muscle strength
C) Decrease in muscle size
D) Increase in fat storage
Answer: B) Increase in muscle strength
Explanation: Muscle hypertrophy refers to the increase in the size of muscle fibers, which generally leads to increased strength.
MCQ 43
What is the main role of the respiratory system during intense exercise?
A) Provide energy
B) Remove waste
C) Supply oxygen
D) All of the above
Answer: C) Supply oxygen
Explanation: The primary function of the respiratory system during exercise is to supply oxygen to the bloodstream for energy production.
MCQ 44
Which movement involves rotating a body part around its axis?
A) Flexion
B) Rotation
C) Abduction
D) Extension
Answer: B) Rotation
Explanation: Rotation refers to the circular movement of a body part around an axis, like turning the head side to side.
MCQ 45
Which muscle is primarily responsible for extending the knee?
A) Hamstrings
B) Quadriceps
C) Gastrocnemius
D) Gluteus maximus
Answer: B) Quadriceps
Explanation: The quadriceps group extends the knee, playing a key role in activities like standing and running.
MCQ 46
What is the role of the bursa in joints?
A) Produce synovial fluid
B) Reduce friction
C) Store nutrients
D) Connect bone to bone
Answer: B) Reduce friction
Explanation: Bursae are small fluid-filled sacs that reduce friction between bones and soft tissues in joints.
MCQ 47
Which of the following is an example of an isotonic contraction?
A) Holding a weight still
B) Lifting a weight
C) Stretching a rubber band
D) Pushing against a wall
Answer: B) Lifting a weight
Explanation: Isotonic contractions involve a change in muscle length while producing movement, such as lifting or lowering weights.
MCQ 48
What is the role of the neuromuscular system?
A) Provide energy
B) Control movement
C) Store calcium
D) Supply oxygen
Answer: B) Control movement
Explanation: The neuromuscular system coordinates the activity of muscles and nerves to enable movement.
MCQ 49
Which of the following muscles is responsible for inhalation?
A) Diaphragm
B) Intercostal muscles
C) Abdominals
D) A and B
Answer: D) A and B
Explanation: Both the diaphragm and intercostal muscles contract to expand the thoracic cavity, facilitating inhalation.
MCQ 50
What is the primary source of energy during aerobic exercise?
A) Creatine phosphate
B) Glucose
C) Fatty acids
D) Protein
Answer: C) Fatty acids
Explanation: During aerobic exercise, the body primarily uses fatty acids and glucose for energy production in the presence of oxygen.
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