Answer the following question given this paragraph: The adaptive, or acquired, immune response takes days or even weeks to become establishedmuch longer than the innate response; however, adaptive immunity is more specific to an invading pathogen. Adaptive immunity is an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination. An antigen is a molecule that stimulates a response in the immune system. This part of the immune system is activated when the innate immune response is insufficient to control an infection. In fact, without information from the innate immune system, the adaptive response could not be mobilized. There are two types of adaptive responses: the cell-mediated immune response, which is controlled by activated T cells, and the humoral immune response, which is controlled by activated B cells and antibodies. Activated T and B cells whose surface binding sites are specific to the molecules on the pathogen greatly increase in numbers and attack the invading pathogen. Their attack can kill pathogens directly or they can secrete antibodies that enhance the phagocytosis of pathogens and disrupt the infection. Adaptive immunity also involves a memory to give the host long-term protection from reinfection with the same type of pathogen; on reexposure, this host memory will facilitate a rapid and powerful response. Q: What term is used to describe an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination? Choices: - variation immunity - autoimmunity - herd immunity - adaptive immunity A:
adaptive immunity
Answer the following question given this paragraph: Watch this animation (http://openstaxcollege. org/l/sintestine) that depicts the structure of the small intestine, and, in particular, the villi. Epithelial cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems. In the small intestine, the products of food digestion are absorbed by different structures in the villi. Which structure absorbs and transports fats?. Q: Which cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems? Choices: - myocyte - blood cells - neurons - epithelial cells A:
epithelial cells
Q: Answer the following question given this paragraph: Most prokaryotic cells are much smaller than eukaryotic cells. They have a cell wall outside their plasma membrane. Prokaryotic DNA consists of a single loop. Some prokaryotes also have small, circular pieces of DNA called plasmids. Q: Prokaryotic cells have what structure outside their plasma membrane? Choices: - plasma wall - cell membrane - sodium channel - cell wall A:
A: cell wall
Question: Answer the following question given this paragraph: Q: What circulates with the blood or hemolymph and are often contained within specialized cells Choices: - structural pigments - muscular pigments - fat pigments - respiratory pigments A:
Answer: respiratory pigments
*Question*
Answer the following question given this paragraph: The force that a magnet exerts on certain materials, including other magnets, is called magnetic force . The force is exerted over a distance and includes forces of attraction and repulsion. North and south poles of two magnets attract each other, while two north poles or two south poles repel each other. A magnet can exert force over a distance because the magnet is surrounded by a magnetic field . In the Figure below , you can see the magnetic field surrounding a bar magnet. Tiny bits of iron, called iron filings, were placed under a sheet of glass. When the magnet was placed on the glass, it attracted the iron filings. The pattern of the iron filings shows the lines of force that make up the magnetic field of the magnet. The concentration of iron filings near the poles indicates that these areas exert the strongest force. You can also see how the magnetic field affects the compasses placed above the magnet. To see an animated magnetic field of a bar magnet, go to this URL: http://micro. magnet. fsu. edu/electromag/java/magneticlines/. Q: The force that a magnet exerts on certain materials is called what? Choices: - stellar force - velocity force - centripetal force - magnetic force A:
**Answer**
magnetic force
Q: Answer the following question given this paragraph: Arthropod at http://animal. discovery. com/animal-facts/arthropod-info. htm. Q: A bicycle is an example of a compound machine made of many what? Choices: - linked machines - useful machines - interchangeable machines - simple machines A:
A: simple machines