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Biology : Human Circulatory System I

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Pulse rate in a healthy adult man is _______ beats / minute. (at rest)72-78
Normal blood pressure (BP) in a 25-year-old man is _______ mm Hg.120/80120 mm Hg is the systolic BP, i.e., during ventricular contraction. 80 mm Hg is the diastolic BP, i.e., during ventricular relaxation. In a 25-year-old person systolic pressure ranges from 110/130 mm Hg and diastolic from 70/90 mm Hg.
 This statement is not true :All veins carry deoxygenated blood.All veins carry deoxygenated blood except pulmonary veins which bring oxygenated blood from lungs to left auricle.
Identify the blood vessel 'A' in this diagram.
AortaDuring ventricular contraction, blood is pumped into the aorta, the main arterial trunk, from where it is carried to various parts of the body.
Which blood vessels carry blood from heart to various parts of the body?Arteries
Sphygmomanometer is an instrument used to recordBlood pressureIt is a mercury manometer.
 This statement is not true regarding hemoglobin : Percentage of hemoglobin in a healthy young man is 10/12 gm%. Hemoglobin is 14-16 gms%.
 This statement is true regarding platelets : Platelets do not contain nucleus.Platelets are formed by fragmentation of megakaryocytes; therefore, they do not contain any nucleus.
Identify the blood vessel 'D' in this diagram.
Pulmonary TrunkPulmonary trunk divides into right and left pulmonary arteries which carry deoxygenated blood to the lungs.
 This statement is not true :Right ventricle pumps blood to various parts of the body.Right ventricle pumps deoxygenated blood to lungs through pulmonary arteries. In the lungs, it gets oxygenated and is sent back to left auricle through pulmonary veins.
Which of these does not cause an increase in pulse rate?SleepDuring fever, anxiety and exercise, metabolic rate of the body increases. This results in increased oxygen demand, which in turn causes increase in heart rate.
Due to presence of _______ , back flow of blood is prevented in veins.Valves
Very fine vessels called capillaries connect arteries and veins to each other.True
Deficiency of hemoglobin is known as anemia.True
Contraction of ventricles is known as diastole.FalseContraction of ventricles is known as systole. It results in ejection of blood out of the ventricles.
Diastole is the relaxation of ventricles. It results in filling of the ventricles with the blood.
Bleeding time is prolonged in hemophilia.FalseHemophilia is caused due to deficiency of a clotting factor. Bleeding time i.e. the time required for bleeding to stop when a puncture is made into the skin, remains unchanged. Clotting time is prolonged.

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