![subject](/tpl/images/cats/biologiya.png)
Biology, 06.01.2020 18:31 minecraftpro64p7t123
Select the best explanation of how a t cell uses either cell-to-cell contact or chemical signaling to enhance the activities of the immune system.1. chemicals called cytokines are secreted from t cells to signal production of antibodies by b cells.2. the t cell stimulates the antigen-presenting cell to release chemicals called cytokines to stimulate the cytotoxic t cells.3. the second exposure of the antigen causes the t cell to activate memory t cells.4. the pathogen is engulfed by a t cell and its antigenic markers are displayed on its surface.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 23:00
In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 03:30
Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 05:00
What best describes the dropping height of a ball that bounces back up to a height of 45 cm
Answers: 1
You know the right answer?
Select the best explanation of how a t cell uses either cell-to-cell contact or chemical signaling...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 03.12.2020 22:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 03.12.2020 22:20
![question](/tpl/images/cats/mat.png)
Mathematics, 03.12.2020 22:20
![question](/tpl/images/cats/biologiya.png)
Biology, 03.12.2020 22:20
![question](/tpl/images/cats/istoriya.png)
History, 03.12.2020 22:20
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/User.png)
Engineering, 03.12.2020 22:20
![question](/tpl/images/cats/mat.png)
Mathematics, 03.12.2020 22:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 03.12.2020 22:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 03.12.2020 22:20
![question](/tpl/images/cats/en.png)
English, 03.12.2020 22:20
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 03.12.2020 22:20