91影视

The process of the body that assists in eliminating foreign substances is called the immune system. Various organs and cells participate in giving immunity to the body. In humans, the thymus, bone marrow, lymph nodes, and blood cells are the major components of the immune system.

In insects, the fat body, effector molecules, and hemocytes act as protective components of the immune system.

The action of proteolytic enzymes activates the pathogen-killing chemicals in insects. They induce the insects鈥� innate immune responses.

Therefore, innate immunity or pathogen-killing effectors are activated by enzymes in insects.

Thus, the given statement is false.

Natural killer cells are present in jawed vertebrates. They are lymphoid cells and mediate both innate and adaptive immune systems. Insects lack adaptive immunity.

Therefore, insects鈥� immunity does not activate by the action of natural killer cells.

Thus, the given statement is true.

Insect response to the pathogens and parasites through a cellular response called hemocyte phagocytosis. Hemocytes are present in the hemolymph. They act as phagocytes of insects and kill the parasites or pathogens.

Therefore, hemocytes participate in the phagocytosis of insects鈥� immune systems.

Thus, the given statement is false.

Living organisms, including insects, produce antimicrobial peptides from the ribosomal gene-encoded pre-peptides. They serve as natural defense compounds.

Therefore, antimicrobial peptides are synthesized in insects.

Thus, the given statement is false.