Which of the following statements are correct ?
i) Secondary response is highly intensified.
ii) The T cells themselves secret antibodies.
iii) Because the antibodies are found in the blood the response is also called as humoral immune response.

Choose the correct answer from the options given below:

(i) and (iii)

The correct answer is Option (3) – (i) and (iii)

Among the statements provided:

i) "Secondary response is highly intensified." - This statement is correct. The secondary immune response, which occurs upon re-exposure to a pathogen, is indeed more rapid and heightened compared to the primary immune response due to the presence of memory B cells and memory T cells.

ii) "The T cells themselves secrete antibodies." - This statement is incorrect. T cells do not secrete antibodies. Instead, they play a central role in cell-mediated immunity by recognizing and directly attacking infected cells or by activating other immune cells.

iii) "Because the antibodies are found in the blood, the response is also called as humoral immune response." - This statement is correct. The humoral immune response refers to the immune response mediated by antibodies, which are produced by B cells and are found in bodily fluids such as blood and lymph.

So, the correct statements are:

(i)Secondary response is highly intensified.

iii) Because the antibodies are found in the blood, the response is also called as humoral immune response.