Biology
Given below are certain structures, write their chief functional activity.
(a) Blood platelets ……….
(b) Neutrophils ……….
(c) Erythrocytes ……….
(d) Lymphocytes ……….
(e) Bone marrow ……….
Related Questions
Assertion Thrombin is the inactive form of prothrombin which is produced during blood coagulation.
Reason Vitamin K, a fat-soluble vitamin, is essential for the production of prothrombin.
- Both A and R are True
- Both A and R are False
- A is True and R is False
- A is False and R is True
Assertion. Blood group 'AB' does not contain any antibody but contains both the antigens 'A' and 'B'.
Reason. In humans, WBCs have specific proteins on their surfaces. These proteins are called antibodies.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Name these:
(a) Three components of circulatory system
(b) Three kinds of blood cells
(c) Three kinds of blood vessels
(d) Three circulating fluids in human body
(e) Three non-circulating fluids in human body
(f) Two lymphatic organs
(g) Two components of blood
(h) Two kinds of circulatory systems in different animals
(i) Two components of haemoglobin
(j) Two phases of circulation of blood in human body
Name the following:
(a) Any one vein which starts from an organ and ends in another organ besides the heart.
(b) The kind of blood vessels which have no muscular walls.
(c) The artery which carries deoxygenated blood.
(d) The kind of blood cells which can squeeze out through the walls of one category of blood vessels.
(e) The smallest common blood vessels formed by the union of capillaries.
(f) The blood vessels which start from capillaries and end in capillaries.
(g) The phase of the cardiac cycle in which the auricles contract.
(h) The valve present in between the chambers on the right side of the human heart.
(i) The phase of the cardiac cycle in which the ventricles get filled with blood from the atrium.
(j) The fluid found between the membranes of the heart.