BHK Trivia 4 — Questions and Answers
Question 1: Which vitamin is synthesized in the skin upon exposure to ultraviolet B (UVB) radiation and is essential for calcium absorption?
- Vitamin D (Correct answer)
- Vitamin K
- Vitamin A
- Vitamin E
Correct answer: Vitamin D
Vitamin D3 (cholecalciferol) is produced when UVB rays convert 7-dehydrocholesterol in the skin, and it enhances intestinal calcium absorption.
Question 2: The 'talk test' is used to estimate exercise intensity based on which physiological threshold?
- First ventilatory threshold (Correct answer)
- Lactate threshold 2
- VO2max
- Anaerobic capacity
Correct answer: First ventilatory threshold
The talk test corresponds approximately to the first ventilatory threshold, where speech becomes noticeably more difficult during exercise.
Question 3: What is the term for the gradual reduction in training load before a major competition to optimize performance?
- Tapering (Correct answer)
- Deloading
- Periodization
- Supercompensation
Correct answer: Tapering
Tapering involves a progressive reduction in training volume while maintaining intensity to allow full physiological recovery before competition.
Question 4: Which law states that a muscle generates maximum force when at its optimal resting length?
- Length-tension relationship (Correct answer)
- Force-velocity relationship
- Hill's equation
- Fick's principle
Correct answer: Length-tension relationship
The length-tension relationship describes how sarcomere length affects the number of actin-myosin cross-bridges and thus maximum force production.
Question 5: The 'SAID principle' in exercise science stands for what?
- Specific Adaptation to Imposed Demands (Correct answer)
- Strength And Intensity Development
- Sequential Adaptation In Dysfunction
- Systematic Approach to Individual Development
Correct answer: Specific Adaptation to Imposed Demands
SAID (Specific Adaptation to Imposed Demands) states that the body adapts specifically to the type, intensity, and volume of training performed.
Question 6: Which blood component is primarily responsible for transporting oxygen to working muscles?
- Hemoglobin in red blood cells (Correct answer)
- Plasma albumin
- White blood cells
- Platelets
Correct answer: Hemoglobin in red blood cells
Hemoglobin, an iron-containing protein in red blood cells, binds up to four oxygen molecules and carries them to tissues.
Question 7: The 'dead bug' exercise is primarily used to train which component of physical fitness?
- Core stability and anti-extension (Correct answer)
- Hip flexor flexibility
- Upper body pushing strength
- Ankle proprioception
Correct answer: Core stability and anti-extension
The dead bug trains core stability by challenging the ability to resist lumbar extension while maintaining a neutral spine.
BHK Trivia 4
Which vitamin is synthesized in the skin upon exposure to ultraviolet B (UVB) radiation and is essential for calcium absorption?