Immune System | Summary
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- เผยแพร่เมื่อ 27 เม.ย. 2019
- sciencewithsusanna.com has diagrams, notes, and practice questions.
Quizlet Review: quizlet.com/_6jggx7
The immune system has two main branches: the innate immune response and the adaptive immune response.
The innate immune response includes cells and mechanisms that are able to react to pathogens from birth. The adaptive immune system can learn and remember new pathogens and then protect from them long-term.
The innate immune system is composed of:
1. physical barriers such as mucous membranes and skin
2. chemical barriers such as lysozyme and stomach acid.
3. Complement is a group of small circulating chemicals that, when triggered, form a "membrane attack complex" that can punch holes in pathogen cell membranes.
The leukocytes that are involved in this response include:
*Granulocytes - neutrophils, basophils, eosinophils
*Agranulocytes - macrophages and dendritic cells, which can be phagocytic and present antigens from invaders to the adaptive immune response cells known as helper T cells.
*Lymphocytes - Natural killer cells (NK cells) can cause apoptosis of tumor cells and viral-infected cells.
The adaptive immune response includes T and B lymphocytes. These cells must be activated to a specific pathogen before they can respond.
Helper T cells stimulate cytotoxic T cells to directly destroy pathogens. Helper T cells stimulate B lymphocytes to enlarge into plasma cells and produce antibodies.
These lymphocytes all reproduce rapidly and form memory cells that remain circulating and passing through lymph organs long-term to patrol for the presence of the specific pathogen in the future.
All leukocytes are formed in the bone marrow in a process known as hematopoiesis. - วิทยาศาสตร์และเทคโนโลยี
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I got question in teas exam which cell suppress T cell cells -
a- t regulatory cells
B- B cells
C- plasma cells
D- antibodies
I found answer that it is regulatory cells , but don’t know process plz explain it
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I had questions in teas that patient had wound on skin,when pathogen enter through wound and then which system will help to kill the pathogen
Immune system
Circulatory system
Integumentary system
Lymphatic system
IMMUNE SYSTEM
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I thought cytotoxic T cells killed infected body cells, not pathogens. pathogens themselves are killed by having antibodies stuck to them, which macrophages recognize, and this causes the macrophage to engulf the pathogen. Really nice and organized video though!
same here. from previous class I have that cytotoxic cells attack foreign cells or body cells infected by viruses.
Why don't antigen presenting cells recognize antigens in some disease such as hepatitis B? Or is the problem with the T helper cells? How do innate immunity cells know when something is foreign?
Bacteria flora on skin and gut also competitively inhibits pathogens , I think they also can be included in innate immunity .
Hai, your channel amazingly helpful...hopefully there's topic about oncology on your next video 😅, tq.
For some reason I'm watching immune system videos for no reason. I'm not saying the videos I watched are bad. I just have no idea why I'm watching them.
Could we get a pdf of your video please especially the picture of your headnotes please. Thanks
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Eosinophil means Eo or Eos - dawn (of red colour thus) so as it stains red it maybe means it is 'acidic' (but note it comes like most medical terms either from ancient Gk. or with some others from Latin). 'Phil' always means likiing or loving. It is a bit moot and a quibble but I am interested in the etymology of words.
Actually, the name "Eosinophils" is named after the dye "eosin", which is red in color.
Eo or Eos mean "dawn" like you said.
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Chemical Barriers commonly found in our bodily secretions are: (1) Lysozomes, (2) IgA (A.K.A. The Anti Septic Paint of our mucosal linings, because they are present in EVERY mucosal surface), (3) Lactofferin, and (4) Amylase (the digestive enzyme mentioned in the video).
The info helped me thank you. Presentation of info good, but cd be great
Hank says that B lymphocytes mature in bone marrow. Not in the lymph system
Susanna, would be so cool if in the last few secs you pulled the camera back to get a shot of the entire page.
Why did I only find this video one day after my bio exams :(
It's fun!
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