Answer to Question 1
Cytotoxic T cells attack and destroy body cells infected with viruses or intracellular bacteria. They can also attach cancer cells. Delayed hypersensitivity cells respond to foreign antigens processed by macrophages or similar cells by accumulating at the site of the antigenic material, where they secrete a variety of lymphokines that attract macrophages, activate them, and stimulate them to secrete additional cytokines.
Answer to Question 2
Hyperplasia: increase in cell size with an increase in cell number
Hypertrophy: increase in cell size without an increase in cell number
Micrographs of nerve cells taken with different types of light microscopes.
Color-enhanced scanning electron micrograph of HIV virus (red) infecting T-helper cells (green).
The bridging ability of IgM: (a) Pictorial view of IgM bridging of red cells. (b) Macroscopic view ...
Regulation of fatty acid synthesis in animal cells
Speciation produces new types of organisms
Gene gun used to blast gold particles containing pea gene A into cells of white petals