Which of the following is a role of helper T cells?
A
to ingest pathogens
B
to destroy cells that have been infected by viruses
c
to activate B cells
D
to increase blood flow

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.