The following are steps in the cell-mediated immune response. What is the correct sequence for these steps? 1. Several cycles of mitosis occur. 2. Antigen is engulfed and presented by a macrophage. 3. Cytotoxic T cells migrate to focus of infection. 4. T cells with specific receptors recognize the antigen. 5. T cells differentiate into cytotoxic T cells or T memory cells. 6. Cytotoxic T cells release perforin and/or lymphotoxin.
A) 4, 1, 5, 3, 6, 2
B) 2, 4, 1, 5, 3, 6
C) 1, 2, 4, 5, 3, 6
D) 3, 2, 4, 1, 5, 6
E) 3, 6, 4, 5, 1, 2
Question 2
Which areas of the brain monitor and adjust activities of the motor pathways?
A) basal nuclei
B) cerebellum
C) basal nuclei and cerebellum
D) midbrain
E) pons
Growth response by grasses grazed by wildebeest
Cell Structure
Cell-fie
Plant cell structure
Typical quick-connect steps.
Example of inflammation as a response to bacterial infection.