Physiology of Sports and Exercise — DU B. Sc. (Hons) Biochemistry Previous Year Question Papers

5. Explain the following using a flow chart: i. Relation between ECG, Cardiac Cycle and Ventricular volumes ii. Relation between Neuromuscular junction, and excitation contraction coupling in skeletal muscle ili. Relation between FVC, FEVI, PEF and VC as measured in a spirometer (5x3= 15) Comment on the following statements: i. Exercise can delay the physiological outcomes of ageing ii. A long QT in an ECG can be an indication of cardiac insufficiency during an exercise iii. Higher aerobic capacity is essential only in certain sports iv. Ligament tears are more common than muscle tears during endurance exercise. v. Use of growth hormone for increasing muscle endurance is contraindicated. (3x5= 15) 2. There are 6 questions. 1. A. Define the following: i. Lung. compliance ii. Ergogenic aids iii. Hysterisis iv. Cardiac output v. Phosphocreatine vi. Muscle hypertrophy B. Expand and elaborate the physiological significance of the following: i. VO,max ii. MAP ili. EDV iv. DOMS. 2. Differentiate between the following: i. Arteries and veins ii. Tidal volume and vital capacity iii. Conducting and contracting cardiac muscles iv. Slow and fast twitch fibres v. Muscle fatigue and muscle soreness. (3x5=15) A. Explain the biochemical basis for the following: i. Higher venous return increases stroke volume ii. Respiratory acidosis and hypercapnea during extreme anaerobic exercise iii. Use of anabolic steroids to increase sports performance. iv. Decrease in LBM and increase in fat mass with ageing. v. Heart is an aerobic tissue as compared to muscle. B. Comment and compare on the physiological difference in the performance of a marathon runner and a swimmer. (10,5) 4. A. Explain the use of the following drugs in sports doping: i. Erthropoetin ii. Beta blockers ili. Diuretic iv. Amphetamines B. Explain the role of both hormonal and nutritional agents used to enhance sports performance. (9,6)