Zadanie 5b
Explain the difference in peak timing between the first and later exposures.
Helper T cells activating specific B cells
Explain why antigen recognition and interaction with activated helper T cells are needed for B-cell activation.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2022–2025.
Zadania sprawdzające tę umiejętność: 6 Otwórz w wyszukiwarce z filtrami
Zadanie 27
The model shows an interaction between immune cells, followed by formation of two cell types. What do labels P, Q and R represent? A. P: plasma cell; Q: glucose; R: helper T cell B. P: phagocyte; Q: antibody; R: red blood cell C. P: memory B cell; Q: lipid; R:…
- Materiał graficzny
Zadanie 26
Which event initiates a specific antibody-producing response? A. Activation of a matching B cell by antigen and helper-T-cell signals B. Contraction of a skeletal muscle C. Conversion of fibrinogen into fibrin D. Release of hydrochloric acid in the stomach
Zadanie 28
What is a major role of a helper T lymphocyte during an adaptive immune response? A. Activating other immune cells through signalling B. Secreting the bulk of circulating antibody directly C. Engulfing every extracellular pathogen by phagocytosis D. Producing…
Zadanie 8
(a) Draw and fully label a bacterial cell. (b) Describe barriers that prevent pathogenic bacteria entering the body. (c) Explain how immunity to pathogenic bacteria develops.
Zadanie 6
Cell specialization depends on coordinated cellular processes. (a) Outline processes occurring during interphase. (b) Describe how an action potential propagates along an axon. (c) Explain how cells in blood produce a specific immune response.