Introduction:
When pathogens get past the non-specific defense mechanisms, the second line of defense, specific immune response, attack the invading pathogens. The lymphatic system filters the lymph and removes the foreign particles. The lymphocytes present in the lymphatic system act on these invaders and eliminate them from the body.
Answer to Problem 18A
Correct answer:
Option (C) a B cell.
Explanation of Solution
Explanation/justification for the correct answer:
Option (C) a B cell. The diagram is depicting antibody-mediated response. When a macrophage comes in contact with an antigen or a foreign particle, it engulfs it through phagocytosis. A portion of the antigen is held outside of the cell by a receptor. The antigen is then presented to the helper T cells by binding of macrophage to the receptor present on the T cell. This binding helps in the division of T cells. The helper T cells get activated and present the antigen to the B cells. B cells divide, and some of the daughter cells produce antibodies, while some of them become memory B cells.
The explanation for the incorrect answer:
Option (A) a pathogen. The helper T cell presents the antigen to the B cells. The pathogen produces antigens that are detected by macrophages. Hence, it is an incorrect answer.
Option (B) bone-marrow. Bone marrow is responsible for only the production of lymphocytes that further mature in the B and T cell. It plays no role in presenting the antigen during a specific immune response. Hence, it is an incorrect answer.
Option (D) the thymus gland. The thymus gland is the site of T cell maturation. It does not play any role in presenting the antigen during a specific immune response. Hence, it is an incorrect answer.
Chapter 37 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Applications and Investigations in Earth Science (9th Edition)
Campbell Essential Biology (7th Edition)
Human Anatomy & Physiology (2nd Edition)
Microbiology: An Introduction
Microbiology: An Introduction
- There is a species of eagle, which lives in a tropical forest in Brazil. The alula pattern of its wings is determined by a single autosomal gene with four alleles that exhibit an unknown hierarchy of dominance. Genetic testing shows that individuals 1-1, 11-4, 11-7, III-1, and III-4 are each homozygous. How many possible genotypes among checkered eagles in the population?arrow_forwardwhat is this called?arrow_forwardcan you help me identify this it's based on onion rootarrow_forward
- Which evidence-based stress management techniques are most effective in reducing chronic stress and supporting college students’ academic success?arrow_forwardstudents in a science class investiged the conditions under which corn seeds would germinate most successfully. BAsed on the results which of these factors appears most important for successful corn seed germination.arrow_forwardI want to write the given physician orders in the kardex formarrow_forward
- Amino Acid Coclow TABle 3' Gly Phe Leu (G) (F) (L) 3- Val (V) Arg (R) Ser (S) Ala (A) Lys (K) CAG G Glu Asp (E) (D) Ser (S) CCCAGUCAGUCAGUCAG 0204 C U A G C Asn (N) G 4 A AGU C GU (5) AC C UGA A G5 C CUGACUGACUGACUGAC Thr (T) Met (M) lle £€ (1) U 4 G Tyr Σε (Y) U Cys (C) C A G Trp (W) 3' U C A Leu בוט His Pro (P) ££ (H) Gin (Q) Arg 흐름 (R) (L) Start Stop 8. Transcription and Translation Practice: (Video 10-1 and 10-2) A. Below is the sense strand of a DNA gene. Using the sense strand, create the antisense DNA strand and label the 5' and 3' ends. B. Use the antisense strand that you create in part A as a template to create the mRNA transcript of the gene and label the 5' and 3' ends. C. Translate the mRNA you produced in part B into the polypeptide sequence making sure to follow all the rules of translation. 5'-AGCATGACTAATAGTTGTTGAGCTGTC-3' (sense strand) 4arrow_forwardWhat is the structure and function of Eukaryotic cells, including their organelles? How are Eukaryotic cells different than Prokaryotic cells, in terms of evolution which form of the cell might have came first? How do Eukaryotic cells become malignant (cancerous)?arrow_forwardWhat are the roles of DNA and proteins inside of the cell? What are the building blocks or molecular components of the DNA and proteins? How are proteins produced within the cell? What connection is there between DNA, proteins, and the cell cycle? What is the relationship between DNA, proteins, and Cancer?arrow_forward
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education