BHK Bachelor of Kinesiology MCQ 2 — Questions and Answers
Question 1: Which energy system provides ATP most rapidly during a maximal 100-meter sprint?
- Oxidative phosphorylation
- Glycolysis
- Phosphocreatine (PCr) system (Correct answer)
- Beta-oxidation
Correct answer: Phosphocreatine (PCr) system
The phosphocreatine system regenerates ATP almost instantaneously without oxygen, making it the primary fuel source during maximal, very short-duration efforts.
Question 2: The sliding filament theory of muscle contraction states that sarcomere shortening occurs because:
- Actin and myosin filaments shorten in length
- Actin filaments slide over myosin filaments toward the M-line
- Myosin filaments slide over actin filaments toward the Z-discs
- Actin filaments slide over myosin filaments toward the Z-discs (Correct answer)
Correct answer: Actin filaments slide over myosin filaments toward the Z-discs
During contraction, thin actin filaments slide inward toward the center of the sarcomere (Z-discs move closer together) while filament lengths remain unchanged.
Question 3: Which of the following best describes the concept of specificity in exercise training?
- Training adaptations are general and transfer to all physical tasks
- The body adapts specifically to the type of stress placed upon it (Correct answer)
- High-volume training always produces greater gains than low-volume training
- Rest periods are more important than training stimuli
Correct answer: The body adapts specifically to the type of stress placed upon it
The SAID principle (Specific Adaptations to Imposed Demands) states that the body adapts in a manner specific to the type, intensity, and volume of exercise performed.
Question 4: During normal gait, which phase of the gait cycle has the highest ground reaction force?
- Initial contact (heel strike) (Correct answer)
- Mid-stance
- Terminal stance (push-off)
- Swing phase
Correct answer: Initial contact (heel strike)
Ground reaction forces peak during initial contact (heel strike), often reaching 110–120% of body weight as the foot accepts the load of the falling center of mass.
Question 5: The oxygen dissociation curve shifts to the right (Bohr effect) in response to:
- Decreased temperature and decreased CO₂
- Increased pH and decreased 2,3-BPG
- Increased temperature, CO₂, and decreased pH (Correct answer)
- Decreased exercise intensity
Correct answer: Increased temperature, CO₂, and decreased pH
Increased temperature, CO₂, and acidity (lower pH) reduce hemoglobin's affinity for oxygen, facilitating O₂ release to metabolically active tissues.
Question 6: Which joint motion occurs in the frontal plane around an anterior-posterior axis?
- Flexion and extension
- Rotation
- Abduction and adduction (Correct answer)
- Circumduction
Correct answer: Abduction and adduction
Abduction (movement away from midline) and adduction (movement toward midline) occur in the frontal plane around an anterior-posterior axis.
Question 7: Which hormone is primarily responsible for increasing blood glucose during prolonged exercise?
- Insulin
- Glucagon
- Cortisol
- Both glucagon and cortisol (Correct answer)
Correct answer: Both glucagon and cortisol
Both glucagon (stimulating hepatic glycogenolysis and gluconeogenesis) and cortisol (promoting gluconeogenesis and fat mobilization) work together to maintain blood glucose during prolonged exercise.
BHK Bachelor of Kinesiology MCQ 2
Which energy system provides ATP most rapidly during a maximal 100-meter sprint?