Answer the following question given this paragraph: Figure 24.17 Digestive Enzymes and Hormones Enzymes in the stomach and small intestine break down proteins into amino acids. HCl in the stomach aids in proteolysis, and hormones secreted by intestinal cells direct the digestive processes. Q: Enzymes in the stomach and small intestine break down proteins into what components? Choices: - atoms - antioxidants - lactic acids - amino acids A:
amino acids
Answer the following question given this paragraph: Metal is regularly used in the human body for hip and knee implants. Most implants need to be replaced over time because, among other things, metal does not bond with bone. Researchers are trying to find better metal coatings that would allow metalto-bone bonding. One challenge is to find a coating that has an expansion coefficient similar to that of metal. If the expansion coefficients are too different, the thermal stresses during the manufacturing process lead to cracks at the coating-metal interface. Another example of thermal stress is found in the mouth. Dental fillings can expand differently from tooth enamel. It can give pain when eating ice cream or having a hot drink. Cracks might occur in the filling. Metal fillings (gold, silver, etc. ) are being replaced by composite fillings (porcelain), which have smaller coefficients of expansion, and are closer to those of teeth. Q: What material is regularly used in human hip and knee implants? Choices: - wood - glass - coal - metal A:
metal
Q: Answer the following question given this paragraph: Collision of a relatively slow-moving neutron with a fissile nucleus can split it into two smaller nuclei with the same or different masses. Neutrons are also released in the process, along with a great deal of energy. Any isotope that can undergo a nuclear fission reaction when bombarded with neutrons is called a fissile isotope. During nuclear fission, the nucleus usually divides asymmetrically rather than into two equal parts, as shown in Figure 20.7 "Neutron-Induced Nuclear Fission". Moreover, every fission event of a given nuclide does not give the same products; more than 50 different fission modes have been identified for uranium235, for example. Consequently, nuclear fission of a fissile nuclide can never be described by a single equation. Instead, as shown in Figure 20.8 "Mass Distribution of Nuclear Fission Products of ", a distribution of many pairs of fission products with different yields is obtained, but the mass ratio of each pair of fission products produced by a single fission event is always roughly 3:2. Figure 20.8 Mass Distribution of Nuclear Fission Products of 235U. Q: How does the nucleus divide during nuclear fission? Choices: - evenly - biochemically - equally - asymmetrically A:
A: asymmetrically
Question: Answer the following question given this paragraph: Kinetic friction acts between two surfaces that are in contact and in motion with respect to each other. This force reduces the acceleration and it always opposes the direction of motion. Q: What type of force always opposes the direction of motion? Choices: - binary friction - strong force - harmonic friction - kinetic friction A:
Answer: kinetic friction
*Question*
Answer the following question given this paragraph: A: You may eat a wide variety of carbohydratesfrom sugars in fruits to starches in potatoes. However, body cells use only sugars for energy. Q: What do body cells use for energy? Choices: - chlorophyll - solvents - mixtures - sugars A:
**Answer**
sugars
(Question)
Answer the following question given this paragraph: Ears pop as air pressures inside and outside of the ear equalize. Q: As air pressures inside and outside of the ear equalize, what phenomenon is produced? Choices: - eyes blinking - throat scratching - heart skipping - ear popping A:
(Answer)
ear popping