CBSE Class 11 Body Fluids and Circulation — practice questions
15 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 Body Fluids and Circulation in the app →The oxygen-carrying pigment in red blood cells isA person with blood group O isThe insoluble protein meshwork in a blood clot is made ofThe natural pacemaker of the human heart is theStroke volume 70 mL, heart rate 80 bpm. Cardiac output isA typical normal blood pressure for a healthy adult isThe lifespan of a human red blood cell (erythrocyte) is approximately:A person with blood group AB is considered:The most ABUNDANT type of WBC in human blood is:The mammalian heart has how many chambers?The BICUSPID (mitral) valve is located between:The natural PACEMAKER of the human heart is the:In a typical ECG, the QRS complex represents:A normal resting blood pressure is approximately:The PARASYMPATHETIC nervous system (via the vagus nerve) influences the heart by: