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Question1: Which one of the following human organs is often called the graveyard of RBC’s? [CBSE PMT’2012 M]
(a) Gall bladder
(b) Kidney
(c) Spleen
(d) Liver
Answer: c
Explanation:
Spleen is an organ of the lymphatic system located in the left side of the abdominal cavity under the diaphragm, the muscular partition between the abdomen and the chest. It is called graveyard of RBC because fragment of red blood cells, old and dead cells are constantly being removed from the blood streams by it.
Question2: Bulk of carbondioxide released from the body tissues into the blood is present as [CBSE PMT’2011 M]
(a) bicarbonate in blood plasma and RBC’s
(b) free CO2 in blood plasma
(c) 70% carbamino-haemoglobin and 30% as bicarbonate
(d) carbamino-haemoglobin in RBC’s
Answer: a
70% to 75% CO2 is transported as primary buffer of the blood. Bicarbonate ion (HCO3)in blood plasma, When CO2 diffuses from tissues into blood then it is acted
Question3: Given below is the ECG of a normal human. Which one of its components in human is correctly interpreted below [CBSE PMT’2011 M]
(a) Complex QRS-One complete Pulse
(b) Peak T-initiation of total cardiac contraction
(c) Peak P and Peak R together-Systolic and diastolic blood pressure
(d) Peak P-initiation of left atrial contraction only
Peak P-causes diastolic phase in ventricle while R-Peak causes systole in ventricle means diastolic and systolic phases represented by P & R.