This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 18 Body Fluids And Circulation – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. During recording electrocardiogram patient is connected to 3 electrical leads . there positions are: A) Both wrists and left ankle. B) Left wrist and both ankles. C) 1 on chest, 1 on wrist and 1 on ankle. D) Both wrists and right ankle. Show Answer Correct Answer: A) Both wrists and left ankle. 2. What is the average lifespan of a red blood cell? A) 120 days. B) 60 days. C) 180 days. D) 30 days. Show Answer Correct Answer: A) 120 days. 3. ..... Is comparatively thin in the veins as compared to arteries. A) Tunica intima. B) Tunica media. C) Tunica externa. D) All of the above. Show Answer Correct Answer: B) Tunica media. 4. Pacemaker is situated in the A) Wall of right atrium. B) Interauricular septum. C) Interventricular septum. D) Wall of left atrium. Show Answer Correct Answer: A) Wall of right atrium. 5. Papillary muscles are found in A) Sinus venosus. B) Ventricles. C) Dorsal aorta. D) Auricles. Show Answer Correct Answer: B) Ventricles. 6. Human heart is called myogenic because A) It is controlled by the brain. B) It depends on external neural signals for excitation. C) It is auto excitable by the nodal musculature. D) It contracts only in response to adrenal hormones. Show Answer Correct Answer: A) It is controlled by the brain. 7. Which of the following organisms has an open circulatory system? A) A cat. B) A bee. C) A human. D) An earthworm. Show Answer Correct Answer: B) A bee. 8. In Birds, the ..... 1 ..... atrium receives oxygenated blood from the lungs and ..... B ..... atrium gets the ..... C ..... blood from other body parts. Choose the correct option for A, B and C A) A-RightB-left C-Oxygenated. B) A-LeftB-rightC-deoxygenated. C) A-RightB-left C-deoxygenated. D) A-leftB-Right C-Oxygenated. Show Answer Correct Answer: B) A-LeftB-rightC-deoxygenated. 9. Assertion (A)-1st child of Rh$^{+}$ husband and Rh$^{-}$ wife does not show erythroblastosis foetalis.Reason (R)-Due to the absence of antibodies against Rh antigen in mother's blood . A) Both A and R are true and R is correct explanation of A. B) Both A and R are true and R is not correct explanation of A. C) A is true R is false. D) A is false R is true. Show Answer Correct Answer: A) Both A and R are true and R is correct explanation of A. 10. Blood pressure in the mammalian aorta is maximum during: A) Diastole of the right atrium. B) Systole of the left atrium. C) Diastole of the right ventricle. D) Systole of the left ventricle. Show Answer Correct Answer: D) Systole of the left ventricle. 11. Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature?I. They are somatic cellsII. They do not need to reproduceIII. All their internal space is available to transport oxygenIV. They do not metabolize A) I, II, and IV. B) III and IV. C) Only III. D) Only I. Show Answer Correct Answer: C) Only III. 12. Which of the following statement(s) regarding the cardiac system is/are correct?i) Human heart is an ectodermal derivativeii) Mitral valve guards the opening between the right atrium and left ventricle.iii) SAN is located on the left upper corner of the right atriumiv) Stroke volume x Heart rate = Cardiac output A) (i) only. B) (i) and (ii). C) (ii) and (iii). D) (iv) only. Show Answer Correct Answer: D) (iv) only. 13. S 1-The number of action potentials that could be generated in a minute is same at different parts of the nodal system.S 2-AV node is present in right upper corner of the right atrium A) S 1 and S 2 are true. B) S 1 and S 2 are false. C) S 1 is true but S 2 is false. D) S 1 is false but S 2 is true. Show Answer Correct Answer: B) S 1 and S 2 are false. 14. What is the primary function of lymph? A) Regulate body temperature. B) Carry nutrients and hormones. C) Store waste products. D) Transport oxygen. Show Answer Correct Answer: B) Carry nutrients and hormones. 15. Ratio of RBC/WBC in humans: A) 6:1. B) 60:1. C) 600:1. D) 6000:1. Show Answer Correct Answer: C) 600:1. 16. The spleen is also called as: A) Graveyard of RBCs. B) Blood factory. C) Iron storage. D) Oxygen bank. Show Answer Correct Answer: A) Graveyard of RBCs. 17. Myocardium is made up of: A) Simple squamous epithelium. B) Smooth muscles. C) Cardiac muscless. D) Dense irregular connective tissue. Show Answer Correct Answer: B) Smooth muscles. 18. Which phase of the ECG indicates ventricular excitation and contraction? A) P wave. B) QRS wave. C) T wave. D) XYZ wave. Show Answer Correct Answer: B) QRS wave. 19. An open circulatory system does not have A) A heart. B) Blood vessels. C) Tissue fluid. D) Capillaries. Show Answer Correct Answer: D) Capillaries. 20. Which agranulocyte is phagocytic in nature? A) Neutrophils. B) Lymphocytes. C) Leucocytes. D) Monocytes. Show Answer Correct Answer: D) Monocytes. 21. ..... Increases the pressure causing the closure of tricuspid and bicuspid valve A) Atrial systole. B) Ventricular systole. C) Atrial diastole. D) Ventricular diastole. Show Answer Correct Answer: B) Ventricular systole. 22. Leucocyte plays an important role in A) Phagocytosis. B) Production of antibodies. C) Inflammatory reactions. D) All of the above. Show Answer Correct Answer: D) All of the above. 23. Which type of blood cell is responsible for gas transport? A) Leucocytes. B) Platelets. C) Erythrocytes. D) Lymphocytes. Show Answer Correct Answer: C) Erythrocytes. 24. The colour of plasma is A) Pale yellow. B) Pale orange. C) Brick red. D) Bright orange. Show Answer Correct Answer: A) Pale yellow. 25. Which of the following is absent in blood: A) Fluid matrix. B) Plasma. C) Fibroblast. D) Formed elements. Show Answer Correct Answer: C) Fibroblast. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 18 Body Fluids And Circulation Quiz 1Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 2Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 3Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 4Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 5Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 7Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 8Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 9Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 10Class 11 Biology Chapter 18 Body Fluids And Circulation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books