BHK Trivia 3 — Questions and Answers
Question 1: Which neurotransmitter is released at the neuromuscular junction to initiate skeletal muscle contraction?
- Acetylcholine (Correct answer)
- Dopamine
- Norepinephrine
- Serotonin
Correct answer: Acetylcholine
Acetylcholine is released from motor neuron terminals and binds to nicotinic receptors on the muscle fiber to trigger depolarization.
Question 2: The 'Wingate Anaerobic Test' is typically performed on what type of equipment?
- Cycle ergometer (Correct answer)
- Treadmill
- Rowing ergometer
- Stair climber
Correct answer: Cycle ergometer
The Wingate test is a 30-second all-out sprint on a cycle ergometer used to measure anaerobic peak power and capacity.
Question 3: What is the approximate resting heart rate range associated with high aerobic fitness in elite endurance athletes?
- 28-40 bpm (Correct answer)
- 50-60 bpm
- 60-70 bpm
- 40-50 bpm
Correct answer: 28-40 bpm
Elite endurance athletes often have resting heart rates as low as 28-40 bpm due to enhanced parasympathetic tone and increased stroke volume.
Question 4: The concept of 'muscle memory' in skill learning is neurologically attributed to adaptations in which brain structure?
- Cerebellum (Correct answer)
- Hippocampus
- Amygdala
- Thalamus
Correct answer: Cerebellum
The cerebellum plays a central role in motor learning and the automatization of skilled movements through procedural memory.
Question 5: What is the primary fuel source used during high-intensity exercise lasting 10-30 seconds?
- Phosphocreatine (PCr) (Correct answer)
- Muscle glycogen
- Blood glucose
- Free fatty acids
Correct answer: Phosphocreatine (PCr)
The phosphagen system, using ATP and phosphocreatine, is the dominant energy source for maximal efforts lasting up to about 30 seconds.
Question 6: Which bone is the most commonly fractured in the human body?
- Clavicle
- Radius (Correct answer)
- Fibula
- Humerus
Correct answer: Radius
The distal radius is the most commonly fractured bone, typically occurring from a fall on an outstretched hand (FOOSH).
Question 7: The 'overtraining syndrome' is most commonly associated with what measurable physiological marker?
- Elevated resting heart rate (Correct answer)
- Decreased body fat
- Increased VO2max
- Reduced cortisol
Correct answer: Elevated resting heart rate
An elevated resting heart rate is a key early indicator of overtraining syndrome, reflecting autonomic nervous system disruption.
BHK Trivia 3
Which neurotransmitter is released at the neuromuscular junction to initiate skeletal muscle contraction?