MCQs with Solutions Physiology PDF

‫ ﺍﺳﺌﻠﺔ ﺍﻣﺴﻜﻴﻮ‬:‫ﻧﻮﻉ ﺍﻟﻤﻠﻒ‬ ###MCQs with Solutions### 1. What is the main function of the sinoatrial node (SAN) in the heart? A. Regulate blood pressure B. Initiates atrial contraction C. Regulate heart rate D. Stimulate ventricular muscles **Answer: C. Regulate heart rate** 2. Where is t...

‫ ﺍﺳﺌﻠﺔ ﺍﻣﺴﻜﻴﻮ‬:‫ﻧﻮﻉ ﺍﻟﻤﻠﻒ‬ ###MCQs with Solutions### 1. What is the main function of the sinoatrial node (SAN) in the heart? A. Regulate blood pressure B. Initiates atrial contraction C. Regulate heart rate D. Stimulate ventricular muscles **Answer: C. Regulate heart rate** 2. Where is the sinoatrial node (SAN) located in the heart? A. Left atrium B. Right atrium C. Left ventricle D. Right ventricle **Answer: B. Right atrium** 3. Which part of the heart's conduction system receives electrical impulses from the atria? A. Sinoatrial node (SAN) B. Atrioventricular node (AVN) C. Bundle of His D. Purkinje fibres **Answer: B. Atrioventricular node (AVN)** 4. What is the conduction velocity of the atrioventricular node (AVN) compared to the atria? A. Slower B. Faster C. Equal D. Variable **Answer: A. Slower** 5. Which part of the heart's conduction system branches into the left and right bundle branches? A. Sinoatrial node (SAN) B. Atrioventricular node (AVN) C. Bundle of His D. Purkinje fibres Page: 1 https://t.me/J_K_RBOT  ‫ ﺍﺳﺌﻠﺔ ﺍﻣﺴﻜﻴﻮ‬:‫ﻧﻮﻉ ﺍﻟﻤﻠﻒ‬ **Answer: C. Bundle of His** 6. Purkinje fibres are responsible for transmitting the electrical wave to which part of the heart? A. Atria B. Left ventricle C. Right ventricle D. Septum **Answer: C. Right ventricle** 7. What is the function of the Purkinje fibres in the heart's conduction system? A. Regulate electrical impulses B. Initiate atrial contraction C. Transmit the wave of electricity to the ventricular myocardium D. Receive input from the atria **Answer: C. Transmit the wave of electricity to the ventricular myocardium** 8. What is the purpose of the bundle of His in the heart's electrical conduction system? A. Initiates myocardial contraction in the surrounding tissue B. Receives input from the AVN C. Propagates impulses to the left atrium D. Regulates heart rate **Answer: B. Receives input from the AVN** 9. Which group of cells functions as the heart's intrinsic pacemaker? A. Purkinje fibres B. Bundle of His C. Atrioventricular node (AVN) D. Sinoatrial node (SAN) **Answer: D. Sinoatrial node (SAN)** 10. At what velocity does atrial muscle conduct compared to the atrioventricular node (AVN)? A. 0.05 m/sec Page: 2 https://t.me/J_K_RBOT