input: OPTIONS:
- antifreeze
- dry ice
- fluorocarbons
- liquid nitrogen Now, answer this question: Answer the following question given this paragraph: Magnetic resonance imaging (NMR) devices use liquid nitrogen to cool the superconducting magnets. Nitrogen is a gas at room temperature and liquefies at -195.8C. Its neighbor on the periodic table (oxygen) boils at -182.95C. The interactions between nitrogen molecules (N 2 ) are weaker, so the boiling point is lower. Interactions between non-polar molecules depend on the degree of electron fluctuation within the molecule. Q: Magnetic resonance imaging devices use what to cool the superconducting magnets? A:
A:
output: liquid nitrogen

Answer the following question given this paragraph: Complement An array of approximately 20 types of proteins, called a complement system, is also activated by infection or the activity of the cells of the adaptive immune system and functions to destroy extracellular pathogens. Liver cells and macrophages synthesize inactive forms of complement proteins continuously; these proteins are abundant in the blood serum and are capable of responding immediately to infecting microorganisms. The complement system is so named because it is complementary to the innate and adaptive immune system. Complement proteins bind to the surfaces of microorganisms and are particularly attracted to pathogens that are already tagged by the adaptive immune system. This "tagging" involves the attachment of specific proteins called antibodies (discussed in detail later) to the pathogen. When they attach, the antibodies change shape providing a binding site for one of the complement proteins. After the first few complement proteins bind, a cascade of binding in a specific sequence of proteins follows in which the pathogen rapidly becomes coated in complement proteins. Complement proteins perform several functions, one of which is to serve as a marker to indicate the presence of a pathogen to phagocytic cells and enhance engulfment. Certain complement proteins can combine to open pores in microbial cell membranes and cause lysis of the cells. Q: Which proteins bind to the surfaces of microorganisms and are particularly attracted to pathogens that are already tagged by the adaptive immune system? A:

OPTIONS:
- attractive proteins
- mobilize proteins
- whereby proteins
- complement proteins

Answer: complement proteins

Problem: OPTIONS:
- respiratory
- diarrhea
- relaxation
- constipation
Q: Answer the following question given this paragraph: Q: What is it called when feces move along the colon too slowly? A:
Answer: constipation

Problem:OPTIONS:
- crusts
- crystals
- plants
- compounds

Answer the following question given this paragraph: Did you ever make cupcakes from scratch? You mix together flour, sugar, eggs, and other ingredients to make the batter, put the batter into cupcake papers, and then put them into the oven to bake. The cupcakes that come out of the oven after baking are different from any of the individual ingredients that went into the batter. Like the ingredients that join together to make cupcakes, atoms of different elements can join together to form entirely different substances called compounds. In cupcakes, the eggs and other wet ingredients cause the dry ingredients to stick together. What causes elements to stick together in compounds? The answer is chemical bonds. Q: What is the substance called whenatoms of different elements join together? A:
****
A: compounds

Answer the following question given this paragraph: Mammals breathe with the help of a diaphragm . This is the large muscle that extends across the bottom of the chest below the lungs. When the diaphragm contracts, it increases the volume of the chest. This decreases pressure on the lungs and allows air to flow in. When the diaphragm relaxes, it decreases the volume of the chest. This increases pressure on the lungs and forces air out. Q: What is the large muscle that extends across the bottom of the chest below the lungs called? A:
OPTIONS:
- uterus
- pectoral
- abdomen
- diaphragm
diaphragm

Answer the following question given this paragraph: One example of a sex-linked trait is red-green colorblindness. People with this type of colorblindness cannot tell the difference between red and green. They often see these colors as shades of brown ( Figure below ). Boys are much more likely to be colorblind than girls ( Table below ). This is because colorblindness is a sex-linked, recessive trait. Q: Red-green colorblindness is an example of what kind of trait? A:
OPTIONS:
- dominant
- fatal
- adaptive
- sex-linked

Answer:
sex-linked