What is the difference between innate and adaptive immunity?
A. Innate immunity is present at birth while adaptive immunity is acquired after exposure to pathogens.
B. Innate immunity is acquired after exposure to pathogens while adaptive immunity is present at birth.
C. Innate immunity is mediated by antibodies while adaptive immunity is mediated by T cells.
D. Innate immunity provides long-term protection while adaptive immunity provides only short-term protection.
Innate immunity and adaptive immunity are two arms of the immune system that work together to protect the body from pathogens. Innate immunity is the first line of defense and is present at birth. It includes physical and chemical barriers such as the skin, mucous membranes, and antimicrobial peptides, as well as cells such as macrophages and natural killer cells that can quickly recognize and atack pathogens. Innate immunity is nonspecific, meaning it responds to a wide variety of pathogens in a similar way.
Adaptive immunity, on the other hand, is acquired after exposure to pathogens. It involves the production of antibodies and activation of T cells, which are specific to particular pathogens. Adaptive immunity takes longer to develop than innate immunity, but it provides a more specific and targeted response to pathogens. Once the adaptive immune system has been activated against a particular pathogen, it can provide long-term protection against future infections with that pathogen.
Option b) is incorrect because innate immunity is nonspecific while adaptive immunity is specific. Option c) is incorrect because antibodies are a part of adaptive immunity while T cells can be a part of both innate and adaptive immunity. Option d) is incorrect because adaptive immunity can provide long-term protection, while innate immunity provides immediate but short-lived protection.
 |
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Science
-
Q #1: What is the largest organ in the human body by surface area?
A. Brain
B. Heart
C. Liver
D. Skin
Answer Explanation
The largest organ in the human body by surface area is the skin. It covers the enre external surface of the body and has an average surface area of about 20 square feet in adults.
-
Q #2: A researcher collects data on the number of cars passing through a busy intersection at different times of the day for a month. This data would be most useful to analyze which of the following:
A. traffic patterns during rush hour
B. pedestrian movement during the day
C. air pollution levels in the area
D. noise levels in the area
Answer Explanation
The data collected by the researcher on the number of cars passing through a busy intersection at different times of the day for a month would be most useful to analyze traffic patterns during rush hour.
-
Q #3: Which of the following units is used to indicate length?
A. kg
B. l
C. s
D. m
Answer Explanation
The unit used to indicate length is the meter (m). It is the base unit of length in the Internaonal System of Units (SI).
