Concept explainers
Introduction:
Many organisms attack other organisms and cause infectious diseases. These are known as pathogens. However, the body contains a well-defined organ system that fights with the pathogen. This protective organ system is termed as the immune system. The major function of the immune system is to fight against the invading pathogens.
Answer to Problem 1MCQ
Correct answer:
Lymph is a major component of the lymphatic system. It originates from plasma and moves from the circulatory system with the help of blood vessels. Hence, the correct answer is option b.
Explanation of Solution
Reason for correct answer:
Option b. is given as, “plasma that leaks out of blood vessels.”
The organ system that collects all the leaked body fluids and helps in the destruction of pathogens is termed as the lymphatic system. Lymph is a vital fluid of this system. It originates from the blood plasma and moves out of the circulatory system through the blood vessels. After this, the lymph collects all the invading pathogens and gets absorbed by the lymphatic vessels. In this way, the pathogens are attacked by the lymphatic system.
Reason for incorrect answer:
Option a. is given as, “Blood that contains important pathogens.”
Lymph is a fluid that originates from the plasma present in the blood. It moves out of the circulatory system through the blood vessels. After this, the lymph collects all the invading pathogens and gets absorbed by the lymphatic vessels. In this way, the pathogens are attacked by the lymphatic system. However, lymph is not blood. Hence, option a. is incorrect.
Option c. is given as, “Any part of the body that contains immune cells.”
Lymph is a vital fluid of the lymphatic system. It originates from the blood plasma and moves out of the circulatory system through the blood vessels. After this, the lymph collects all the invading pathogens and gets absorbed by the lymphatic vessels. However, it does not contains any immune cells. Hence, option c. is incorrect.
Option d. is given as, “Pathogen-catching fluid produced at the spleen.”
Lymph originates from the blood plasma and moves out of the circulatory system through the blood vessels. Spleen is not responsible for the production of lymph. After this, the lymph collects all the invading pathogens and gets absorbed by the lymphatic vessels. In this way, the pathogens are attacked by the lymphatic system. Hence, option d. is incorrect.
Hence, the options a., c., and d. are incorrect.
Lymph is a type of blood plasma that helps in the destruction of attacking pathogens and protects the body from infectious diseases. Thus, the correct option is b.
Want to see more full solutions like this?
Chapter 29 Solutions
BIOLOGY: THE ESSENTIALS LL+CONNECT >CB<
- Which large lymphatic organ purifies blood by removing dead red cells, stores blood, and helps the immune system to recognize and attack foreign materials or proteins? a spleen b intestine c appendix d kidneyarrow_forwardHow do corticosteroids act to block inflammation? a. Blocking neutrophil migration b. Blocking mast cells degranulation c. Blocking macrophage activation d. Blocking the synthesis of arachidonic acidarrow_forwardWrite an essay identifying the two categories of lymphoid organs and their roles in the body's immune response. Explain the non-immune functions that the lymphatic system through the spleen and the lymphatic capillaries in the small intestines carry out. (Don't exceed 800 words.)arrow_forward
- What did William Hunter describe the lymphatic system as?arrow_forward. Which does NOT describe humoral immunity? Group of answer choices a. Antibodies are secreted by T-helper cells b. Humoral immunity is effective against circulating toxins c. Some B cells become memory cells d. cytotoxic t cells can make antibodiesarrow_forwardChoose the combination of answers that most accurately completes the statement. Monocytes................ are leukocytes that develop into................... . a. granular, phagocytes c. agranular, macrophages b. agranular, mast cells d. granular, T cellsarrow_forward
- Which characteristic is associated with passive artificial immunity?a. long-term protection duration b. requires several days to develop protection c. immediate protection d. creation of memory in response to antigen exposurearrow_forwardPhagocytes move through capillary walls by squeezing between adjacent endothelial cells, a process known as (a) diapedesis. (b) chemotaxis. (c) adhesion. (d) perforation.arrow_forwardWhich cells produce antibodies? a. Neutrophils. b. Dendritic cells. c. Cytotoxic T cells. d. Plasma cells. The role of the humoral immune response is to a. kill infected cellsb. fight pathogens found in body fluid c. prevent pathogens from entering the body d. initiate an inflammatory responsearrow_forward
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage LearningHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning