Multiple Choice QuestionsCarbon dioxide (CO2) diffuses into blood from tissue site and passes to alveolar site in the form of
bicarbonate; 70%
bicarbonate; 20 - 25%
carbaminohaemoglobin; 60 - 70%
carbaminohaemoglobin; 7%
Select the option having all the correct characteristics.
| Structure | Percentage of WBCs | Function |
 |
0.3 - 0.5 | Phagocytic |
| Structure | Percentage of WBCs | Function |
 |
0.5 - 1.0 | Secrete histamine and serotonin |
| Structure | Percentage of WBCs | Function |
 |
30 - 40 | Defense against parasites |
| Structure | Percentage of WBCs | Function |
 |
30 - 40 | Allergic reactions |
Assertion: On touching radial artery in our wrist, we feel pulse waves.
Reason : The heart beats originate from the sinoatrial node (SA node) on the right atrium.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
B.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
Pulse is the rhythmic contraction and relaxation in the aorta and its main arteries. The pulse rate is same as the heart rate because an artery pulses every time the heart beats. It is usually taken on the radial artery in the wrist but it can be taken on any artery that flows near enough to the surface of the body to be felt. The heart beat originates from the sinoatrial node (SA node)- a pacemaker. It is a mass of neuromuscular tissue.
Atrioventricular node(AV node) is situated in the wall of right atrium. It picks up the wave of concentration propogated by SA node. Bundle of His originates from AV node. They further divide into a network of fine fibres known as Purkinje fibres.
Which one is correct regarding electrocardiograph (ECG)?
P- wave represents the electrical excitation of the ventricle.
QRS complex represents repolarisation of the ventricles
T- wave represents repolarisation of the atria
By counting the number of QRS complexes one can determine the pulse rate
Which of the following is an incorrect statement
Blood group 'O' person have A and B antigens on RBCs.
Eosinophils resist infections and are associated with allergic infection.
RBC's contain carbonic anhydrase.
T wave of normal ECG represent of depolarization of ventricle.
The opening between the right atrium and the right ventricle is guarded by the valve named
bicuspid valve
mitral valve
tricuspid valve
semilunar valve.
Assertion: S.A. node induces excitatory impulses in heart.
Reason: S.A. node is self excitatory.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : Angina pectoris means "pain in the chest".
Reason : It results due to carrying of extra blood to the heart muscle.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
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