NEET UG Body Fluids and Circulation — practice questions
45 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Body Fluids and Circulation in the app →Blood is BEST classified asPlasma constitutes approximately what fraction of blood by volume?The pigment that gives erythrocytes their red colour isThe average lifespan of a human red blood cell is aboutWhich leucocyte is the MOST abundant in human blood?Persons with blood group O are calledThe pacemaker of the human heart is theThe first heart sound ('lub') is produced byNormal resting blood pressure of a healthy adult is approximatelyHepatic portal system carries blood fromPlasma without clotting factors is calledGranulocytes among WBCs includePhagocytic cells of the immune system includeBlood group AB individuals haveErythroblastosis foetalis occurs whenFibrin clot is formed in blood coagulation fromA 3-chambered heart is characteristic ofCardiac output is BEST defined asThe P-wave of an ECG representsLymph differs from blood in that lymphIn the cardiac cycle, ventricular pressure rises sharply duringAdrenal medullary hormones canThe bicuspid (mitral) valve is located betweenThe myogenic nature of the heart means thatDuring joint diastole of the cardiac cycle, blood flows fromCoronary Artery Disease (atherosclerosis) is caused byIn a fish, the heart pumpsSympathetic stimulation of the heartThe thickest layer of the wall of an artery is theHeart failure is BEST distinguished from cardiac arrest in thatThe 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: