a.
To summarize:
The process by which T cells are stimulated by antigen, and compare this process with the activation of B cells.
Concept introduction:
The immune system contains different types of cells, each cell have different specific functions. Lymphocytes are the important immune cells that take part in an active defense mechanism. Lymphocytes include the B-cells and T-cells. B-cells acts on antigen independently. T-cells act on the processed antigen that is presented by antigen presenting cells.
b.
To define:
The term “tolerance”, and explain whether it is essential for effective humoral and cell-mediated immunity.
Concept introduction:
The two types of the immune response include the humoral immunity and the cell-mediated immunity. The humoral immunity involves the activity of B cells that are activated in the presence of an antigen and differentiate to form plasma cells. The plasma cells secret antibodies for a specific antigen. The cell-mediated immunity involves the activation of phagocytes and cytotoxic T cells.
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Chapter 15 Solutions
MICROBIOLOGY W/ACCESS
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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