91.

Ventricular diastole occurs due to a/an

• organ system

• cell organelle

• tissue

• organ

What is the oxidation state of iron in haemoglobin?

• Fe^-

• Fe²⁺

• Fe³⁺

• Fe⁴⁺

Carbon 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.

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