Bundle of His is a network of
nerve fibres distributed in ventricles
nerve fibres found throughout the heart
muscle fibres distributed throughout the heart walls
muscle fibres found only in the ventricle wall
Arteries carry oxygenated blood except
pulmonary
cardiac
hepatic
systemic
A vein possesses a large lumen because
tunica media and tunica externa form a single coat
tunica interna and tunica media form a single coat
tunica interna, tunica media and tunica externa are thick.
tunica media is a thin coat.
Which one engulfs pathogens rapidly?
Acidophils
Monocytes
Basophils
Neutrophils
Which of the following statements is true for lymph?
WBC and serum
All components of blood except RBCs and some proteins
RBCs, WBCs and plasma
RBCs, proteins and platelets
Carbonic anhydrase occurs in
lymphocytes
blood plasma
RBC
leucocytes
You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes.Which of them will you not use for the purpose?
Test-tube containing calcium bicarbonate
Chilled test-tube
Test-tube containing
Test-tube containing sodium oxalate.
Haemoglobin is a type of
carbohydrate
vitamin
skin pigment
respiratory pigment
'DUP' sound is produced during closure of
semilunar valves
bicuspid valve
tricuspid valve
Both (b)and(c)
In mammals, histamine is secreted by
fibroblasts
histocytes
mast cells
