Adaptive
immunity is also known as………
a) nonspecific immunity
b) learned immunity
c) passive immunity
d) acquired immunity
Which of the following is/are the third line of defense?
a) skin immunity
b) adaptive immunity
c) passive immunity
d) acquired immunity
Which of the following line of defense identifies the germs and start making special types of WBCs?
a) first line of defense
b) second line of defense
c) third line of defense
d) passive immunity
Explanation:The third line of defense is immune cells that target specific antigens. The immune cells that play a role in the third line of defense are B-cells and T-cells, both are white blood cells. The B-cells produce antibodies. The T-cells help identify pathogenic cells and destroy targeted cells.
How adaptive immunity or third line of defense works?
a) it identifies the germ cells
b) it makes special WBCs against germs
c) it stops the entry of germs
d) both a and b
Which of the following is/are made by the third line of defense against germs?
a) T cells
b) B cells
c) both a and b
d) none of these
Explanation:T cells are one of the important white blood cells of the immune system and play a central role in the adaptive immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor (TCR) on their cell surface. T cells are born from hematopoietic stem cells, found in the bone marrow.
Explanation:B cells are a type of lymphocyte that are responsible for the humoral immunity component of the adaptive immune system. These white blood cells produce antibodies, which play a key part in immunity. Each B cell contains a single round nucleus.
Which of the following attack/s invaders outside the body?
a) T cells
b) B cells
c) both a and b
d) none of these
