141. The most popularly known blood grouping is the $$ABO$$  grouping. It is named $$ABO$$  and not $$ABC,$$  because $$"O"$$ in it refers to having:

A overdominance of this type on the genes for $$A$$ and $$B$$ types
B one antibody only - either anti - $$A$$ or anti - $$B$$ on the RBC
C no antigens $$A$$ and $$B$$ on RBCs
D other antigens besides $$A$$ and $$B$$ on RBCs
Answer :   no antigens $$A$$ and $$B$$ on RBCs
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142. Arteries are best defined as the vessels which :

A supply oxygenated blood to the different organs
B break up into capillaries which reunite to form one visceral organ
C break up into capillaries which reunite to form a vein
D carry blood from one visceral organ to another visceral organ
Answer :   break up into capillaries which reunite to form one visceral organ
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143. Pulse beat is measured in

A Veins
B Artery (Radial)
C Nerve
D Capillary
Answer :   Artery (Radial)
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144. All veins have deoxygenated blood except

A Renal vein
B Hepatic vein
C Hepatic portal vein
D Pulmonary
Answer :   Pulmonary
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145. How do parasympathetic neural signals affect the working of the heart?

A Reduce both heart rate and cardiac output
B Heart rate is increased without affecting the cardiac output
C Both heart rate and cardiac output increase
D Heart rate decreases but cardiac output increases
Answer :   Reduce both heart rate and cardiac output
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146. Which has no muscular walls

A Capillary
B Arteriole
C Veins
D Artery
Answer :   Capillary
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147. Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature?
(1) They do not need to reproduce
(2) They are somatic cells
(3) They do not metabolize
(4) All their internal space is available for oxygen transport

A only (1)
B (1), (3) and (4)
C (2) and (3)
D only (4)
Answer :   only (4)
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148. Lymph

A Transports O2 to brain
B Transports CO2 to lungs
C Returns interstitial fluid to blood
D Returns RBCs and WBCs to lymph nodes
Answer :   Returns interstitial fluid to blood
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149. Purkinje fibers mainly help in contraction of

A Right auricle
B Left ventricle
C Ventricles
D Aorta
Answer :   Ventricles
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150. Carotid artery carries the blood which is

A Impure blood to kidneys
B Oxygenated blood to brain
C Oxygenated blood to heart
D Renal artery
Answer :   Oxygenated blood to brain
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Practice More MCQ Question on Biology Section

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