This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Common Subjects > Physical Education > Class 12 Physical Education Chapter 9 Physiology And Exercise – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physical Education Chapter 9 Physiology And Exercise Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The amount of oxygen which can be absorbed and consumed by the working muscle from blood is called ..... A) Energy reserve. B) Oxygen intake. C) Oxygen transport. D) Oxygen uptake. Show Answer Correct Answer: D) Oxygen uptake. 2. The heart sounds "lub" and "dup" result from ..... A) Closure of heart valves. B) Firing of the nodes of the intrinsic conduction system. C) Opening of the heart valves. D) Blood rushing through the chambers. Show Answer Correct Answer: A) Closure of heart valves. 3. In which fracture do the bones get bent? A) Comminuted fracture. B) Green stick fracture. C) Transverse fracture. D) Impacted fracture. Show Answer Correct Answer: B) Green stick fracture. 4. Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart? A) SA node, Bundle of His, AV node, Purkinje fibers, bundle branches. B) SA node, AV node, Bundle of His, bundle branches, Purkinje fibers. C) SA node, Bundle of His, bundle branches, Purkinje fibers, AV node. D) AV node, Bundle of His, SA node, Purkinje fibers, bundle branches. Show Answer Correct Answer: B) SA node, AV node, Bundle of His, bundle branches, Purkinje fibers. 5. Training improves oxygen delivery by: A) Decreasing stroke volume. B) Increasing capillary density. C) Decreasing venous return. D) Decreasing plasma volume. Show Answer Correct Answer: B) Increasing capillary density. 6. Reflex arc consists of ..... A) Motor nerve. B) Sensory nerve. C) Both motor and sensory nerve. D) Mixed nerve. Show Answer Correct Answer: C) Both motor and sensory nerve. 7. A 92-year-old man presents with dehydration following 4 days of persistent diarrhea. Under circumstance, hypotonic fluid would be expected in which of the following? A) Ascending Loop. B) PCT. C) Descending Loop. D) Cortical Collecting Tubule. Show Answer Correct Answer: A) Ascending Loop. 8. A freediver wants to hold his breath longer when diving to the depths of the ocean. What could he do before going underwater to increase the length of time he can stay underwater? A) He can breath slowly into a bag before going under. B) He can hypoventilate before going under. C) He can hyperventilate before going under. D) He can hyperventilate into the bag before going under. E) He stretch, warm-up, and get his heart rate up before diving. Show Answer Correct Answer: C) He can hyperventilate before going under. 9. When air pressure inside the lungs is less than air pressure in the atmosphere ..... A) Air moves into the lungs. B) Air moves out of the lungs. C) All the above. D) None of the above. Show Answer Correct Answer: A) Air moves into the lungs. 10. Cardiac Output (CO) formula.**HR= heart rate & SV= Stroke Volume** A) CO = SV / HR. B) SV = CO x HR. C) CO = HR / SV. D) CO = HR x SV. Show Answer Correct Answer: D) CO = HR x SV. 11. What is the main stimulus for glucagon release? A) High blood glucose. B) Low blood glucose. C) High amino acid levels. D) High insulin levels. Show Answer Correct Answer: B) Low blood glucose. 12. More the white fibres in the muscles, less is the speed. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 13. What is the main determinant of blood flow through a vessel, according to Poiseuille's law? A) Vessel radius. B) Blood viscosity. C) Blood pressure. D) Vessel length. Show Answer Correct Answer: A) Vessel radius. 14. Which of the following hormones has little effect on the nervous system? A) Glucagon. B) Somatostatin. C) Pancreatic polypeptide. D) Insulin. Show Answer Correct Answer: D) Insulin. 15. Which of the following steps occurs first? A) Cross-bridges detach from actin when a new ATP binds to myosin. B) Another cross-bridge forms. C) Myosin heads pivot pulling the actin filament toward the center. D) Myosin heads attach to actin. Show Answer Correct Answer: D) Myosin heads attach to actin. 16. How many cells human body normally has? A) 30 to 55 trillion. B) 55 billion. C) 80-100 million. D) 10-15 trillion. Show Answer Correct Answer: A) 30 to 55 trillion. 17. MRNA levels in muscle typically peak after exercise within: A) 4-8 hours. B) 1-2 hours. C) 24-48 hours. D) 12-16 hours. Show Answer Correct Answer: A) 4-8 hours. 18. Cardiac muscle is voluntary or involuntary control? A) Voluntary. B) Involuntary. C) All the above. D) None of the above. Show Answer Correct Answer: B) Involuntary. 19. A group of atoms joined together in a particular way A) System. B) Metabolism. C) Molecule. D) Cell. Show Answer Correct Answer: C) Molecule. 20. Muscle strength comes from A) Height of the body. B) Less flexibility. C) Muscle size. D) Low body weight. Show Answer Correct Answer: C) Muscle size. 21. What is the equation for cellular respiration? A) Glucose + Oxygen = Carbon Dioxide + Water + Energy. B) Glucose + Carbon Dioxide = Energy + Oxygen. C) Oxygen + Glucose = Sunlight + Carbon dioxide. D) Carbon Dioxide+ Water= energy + glucose + oxygen. Show Answer Correct Answer: A) Glucose + Oxygen = Carbon Dioxide + Water + Energy. 22. What equipment is used to measure air being inspired and expired? A) Expirometer. B) Spirometre. C) Inspirometer. D) Spirometer. Show Answer Correct Answer: D) Spirometer. 23. What is the function of hemoglobin? A) To carry iron. B) To carry oxygen. C) To produce oxygen. D) To carry wastes. Show Answer Correct Answer: B) To carry oxygen. 24. Which is NOT the one of the major (99%) contents of our body A) Sodium. B) Hydrogen. C) Oxygen. D) Carbon. Show Answer Correct Answer: A) Sodium. 25. The process which makes major difference between C$_{3 }$and C$_{4}$ plants is ; A) Photorespiration. B) Glycolysis. C) Calvin cycle. D) Respiration. Show Answer Correct Answer: A) Photorespiration. 26. What percentage of total diabetes cases is Type 1 Diabetes Mellitus? A) 10-15%. B) 50%. C) 5%. D) 80%. Show Answer Correct Answer: A) 10-15%. 27. The tiny hair-like structure which is present in the lining of bronchi are called A) Cilia. B) Goblet. C) Flagella. D) All of the above. Show Answer Correct Answer: A) Cilia. 28. Gases will always diffuse (gas exchange) from areas of ..... A) High concentration to areas of equal concentration. B) High concentration to areas of a low concentration. C) Low concentration to areas of high concentration. D) Equal concentrations to high concentration. Show Answer Correct Answer: B) High concentration to areas of a low concentration. 29. What is the respiratory rate? A) The number of breaths taken per minute, typically ranging from 12 to 20 breaths for a healthy adult. B) The amount of air inhaled and exhaled in one breath. C) The total volume of air in the lungs at maximum inflation. D) The rate at which oxygen is consumed by the body. Show Answer Correct Answer: A) The number of breaths taken per minute, typically ranging from 12 to 20 breaths for a healthy adult. 30. Which molecule does not need to be broken down before entering the cell? A) Proteins. B) Starch. C) Oxygen. D) None of the above. Show Answer Correct Answer: C) Oxygen. 31. Which term is associated with producing a pale grey/blue hue? A) Low melanin. B) Low hemoglobin. C) High carotene. D) High melanin. Show Answer Correct Answer: B) Low hemoglobin. 32. The basic rhythm of respiration isgenerated mainly by which collection of neurons in the respiratory center? A) Pneumotaxic center. B) Dorsal respiratory group. C) Apneustic center. D) Ventral respiratory group. Show Answer Correct Answer: B) Dorsal respiratory group. 33. Thrombocytopenia A) High Platelet count. B) Low RBC count. C) Hight RBC count. D) Low platelet count. Show Answer Correct Answer: D) Low platelet count. 34. When your VO2max has reached 100%, which option would have the highest blood pressure? A) Legs Diastolic. B) Arms diastolic. C) Arms systolic. D) Legs systolic. Show Answer Correct Answer: C) Arms systolic. 35. What would skeletal muscles use for fuel during aerobic respiration after exercising for 20 minutes? A) Creatine phosphate. B) Glucose. C) Fat. D) Glycogen. Show Answer Correct Answer: C) Fat. 36. 17 year old female patient with heavymenses, was noted to be pale and with easy fatigability. This may bring a decreased oxygen carrying capacity of the blood. One knows that every 1g of Hgb cancarry this much oxygen A) 2.56mL. B) 1.34 mL. C) 100 mL. D) 50 mL. Show Answer Correct Answer: B) 1.34 mL. 37. Which of the following factors does NOT directly affect the oxygen content of arterial blood? A) Haemoglobin concentration. B) Partial pressure of oxygen ( $P_{O_2}$. C) Oxygen saturation of haemoglobin. D) Cardiac output. Show Answer Correct Answer: D) Cardiac output. 38. A person with a heart rate of 75 beats per minute and stroke volume of 60 mL per beat has a cardiac output of ..... A) 1.25 mL/min. B) 0.8 mL/min. C) 4500 mL/min. D) 120 mL/min. Show Answer Correct Answer: C) 4500 mL/min. 39. What is the primary function of the Golgi Tendon Organ? A) It detects changes in muscle tension. B) It detects changes in blood pressure. C) It detects changes in body temperature. D) It detects changes in blood oxygen levels. Show Answer Correct Answer: A) It detects changes in muscle tension. 40. Blood pressure is the pressure exerted by blood against ..... A) Kidneys. B) Artery walls. C) Brain. D) Stomach. Show Answer Correct Answer: B) Artery walls. 41. The role of the atrioventricular node (AV node) is to A) Conduct impulses to the sinoatrial node (SA node). B) Initiate a sinus rhythm. C) Initiate ventricular depolarization. D) Slow down impulses so that the atria can contract to fill the adjacent ventricles with blood. Show Answer Correct Answer: C) Initiate ventricular depolarization. 42. This is a lineage specific growth factor for megakaryocytes A) EPO. B) TPO. C) GM-CSF. D) G-CSF. Show Answer Correct Answer: B) TPO. 43. Diastolic function is a measure of the ability of the myocardium to ..... and allow adequate ventricular ..... A) Relax, Contact. B) Contact, Emptying. C) Contact, Filling. D) Relax, Filling. Show Answer Correct Answer: D) Relax, Filling. 44. What is the function of the epiglottis? A) It helps in the production of sound. B) It prevents food and liquid from entering the trachea during swallowing. C) It regulates the flow of air into the lungs. D) It aids in the digestion of food. Show Answer Correct Answer: B) It prevents food and liquid from entering the trachea during swallowing. 45. The maximum force generated by a muscle depends on the relative proportions of ..... fibers that make up the muscle. A) Type 1. B) Type 2. C) Type 1 and 2. D) None of the above. Show Answer Correct Answer: C) Type 1 and 2. 46. What produces a yellow/orange hue in the skin? A) High melanin. B) Low hemoglobin. C) High carotene. D) Low melanin. Show Answer Correct Answer: C) High carotene. 47. Mr. Mac was cooking and burned his fingertips on his left hand. Which of the following is a potential consequence for the patient. A) Could cut a finger and not realize it. B) Unable to move the knuckles. C) Will be paralyzed from the elbow to the fingertips. D) None of these. Show Answer Correct Answer: A) Could cut a finger and not realize it. 48. Which adaptation does NOT occur with endurance training? A) Increased stroke volume. B) Increased capillary density. C) Increased fast-twitch fiber percentage. D) Increased mitochondrial volume. Show Answer Correct Answer: C) Increased fast-twitch fiber percentage. 49. This is located in the right atrium and is the heart's pacemaker. A) Atrioventricular (AV) node. B) Purkinje fibers. C) Atrioventricular (AV) bundle. D) Sinoatrial (SA) node. Show Answer Correct Answer: D) Sinoatrial (SA) node. 50. During ..... , the diaphragm contracts and the rib cage rises up. A) INHALATION. B) EXHALATION. C) All the above. D) None of the above. Show Answer Correct Answer: A) INHALATION. 51. Slow heart rate (under 60 bpm) A) Tachycardia. B) Bradycardia. C) All the above. D) None of the above. Show Answer Correct Answer: B) Bradycardia. 52. Which type are Yogic exercises? A) Aerobic. B) Stretching. C) Balancing. D) All of above. Show Answer Correct Answer: D) All of above. 53. What are the main components of the respiratory system? A) Nose, pharynx, larynx, trachea, bronchi, lungs, and alveoli. B) Heart, arteries, veins, and capillaries. C) Stomach, intestines, liver, and pancreas. D) Skin, hair, nails, and sweat glands. Show Answer Correct Answer: A) Nose, pharynx, larynx, trachea, bronchi, lungs, and alveoli. 54. Refers to as slowchannels: A) Voltage-gated Na+ channels. B) Voltage-gated K+ channels. C) Voltage-gated Ca2+ channels. D) Na+ co-transport with glucose and amino acids. Show Answer Correct Answer: C) Voltage-gated Ca2+ channels. 55. Which of the bones do not come under the axial skeleton A) Vertebral column. B) Skull bones. C) Ribs and sternum. D) Pectoral girdle. Show Answer Correct Answer: D) Pectoral girdle. 56. This is also called as the voice box. A) PHARYNX. B) DIAPHRAGM. C) LARYNX. D) TRACHEA. Show Answer Correct Answer: C) LARYNX. 57. Which component of blood carries the majority of oxygen? A) Platelets. B) White blood cells. C) Plasma proteins. D) Haemoglobin in red blood cells. Show Answer Correct Answer: D) Haemoglobin in red blood cells. 58. Describe the main functions of the human skeletal system. A) Respiration and gas exchange. B) Hormone production and regulation. C) The main functions of the human skeletal system are support, protection, movement, blood cell production, and mineral storage. D) Digestion and nutrient absorption. Show Answer Correct Answer: C) The main functions of the human skeletal system are support, protection, movement, blood cell production, and mineral storage. 59. Identify the types of neurons and their functions. A) Sensory neurons (transmit sensory information), motor neurons (control muscle movements), interneurons (connect sensory and motor neurons). B) Cognitive neurons (process thoughts). C) Emotional neurons (regulate feelings). D) Reflex neurons (trigger automatic responses). Show Answer Correct Answer: A) Sensory neurons (transmit sensory information), motor neurons (control muscle movements), interneurons (connect sensory and motor neurons). 60. ..... spread the impulse through the ventricle wall muscles of the heart after the signal is sent through the AV bundle. A) Sinoatrial (SA) node. B) Atrioventricular (AV) node. C) Purkinje fibers. D) None of the above. Show Answer Correct Answer: C) Purkinje fibers. 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