What happens during the third step of helper T cell activation? Select one: a. The helper T cell recognizes only the self-antigen presented by the APC. b. The helper T cell undergoes mitosis and differentiates into subtypes. c. CD4 binds to the antigen-binding groove of the MHC II molecule. d. The antigen-presenting cell releases antibodies.
Added by Christopher A.
Step 1
Step 1: The antigen-presenting cell (APC) processes and presents an antigen fragment on its surface bound to an MHC II molecule. Show more…
Show all steps
Your feedback will help us improve your experience
Keemin Lee and 100 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Which cells can function as antigen presenting cells for T helper cells? (A.) Dendritic cells and neutrophils (B.) Neutrophils and macrophages (C.) Macrophages and dendritic cells (D.) Mast cells, macrophages, and dendritic cells (E.) Mast cells and neutrophils 3. The antigens that B cells bind with their BCR are endocytosed and: (A.) Destroyed by intracellular complement proteins (B.) Displayed on the surface of the cell in MHC Class II (C.) Displayed on the surface of the cell in MHC Class I (D.) Displayed on the surface of the cell in the BCR (E.) Transported to the nucleus to regulate gene transcription 3. Which T-helper cell surface protein is critical for activation of B cells and class switch? (A.) CD40 ligand (CD40L) (B.) Cytokines (C.) BAFF (D.) IL-4 (E.) IL-2
Keemin L.
b) Place the events in Cytotoxic T-cells in order: 1. The activated helper T cell then proliferates into more T Helper cells and memory T cells. 2. Cytotoxic T cell releases destroy the infected cell. 3. Cytotoxic T cells recognize and bind infected cells displaying non-self antigen on their MHC I. 4. Naive Helper T-cell binds MHC II molecule on an APC. 5. T Helper cells (specifically Th2) release cytokines to activate cytotoxic T cells. 6. Cytokines are secreted and activate the T Helper Cell. c) Place the events of B cell activation in order: 1. T Helper Cell (TH2) releases cytokines that activate B cell. 2. B cell phagocytoses antigen and displays it on MHC II receptor. 3. T Helper Cell (TH2) binds to antigen on MHC II on B cell surface. 4. B cell proliferates to produce plasma cells and memory B cells. 5. Plasma cells secrete antibodies. 6. Antibodies bind pathogens and are removed from the body by spleen and liver or through phagocytic cells (macrophages, neutrophils, etc).
Madhur L.
Rank the options below: 1. The B cell endocytizes and processes a specific antigen. 2. The B cell uses an MHC class II molecule to present the antigen to the helper T cell. 3. The T cell binds to the MHC class II/antigen complex. 4. The B cell divides and the daughter B cells divide, resulting in plasma cells that produce antibodies.
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD