Answer the following question given this paragraph: Encephalitis is a brain infection most often caused by viruses. The immune system tries to fight off a brain infection, just as it tries to fight off other infections. But sometimes this can do more harm than good. The immune system's response may cause swelling in the brain. With no room to expand, the brain pushes against the skull. This may injure the brain and even cause death. Medicines can help fight some viral infections of the brain, but not all infections. Q: What is most often the cause of encephalitis? Choices: - parasites - bacterial infections - calcium buildup - viruses A:
viruses
Answer the following question given this paragraph: Figure 33.8 Cyclotrons use a magnetic field to cause particles to move in circular orbits. As the particles pass between the plates of the Ds, the voltage across the gap is oscillated to accelerate them twice in each orbit. Q: What do cyclotrons use to cause particles to move in circular orbits? Choices: - layers field - occurs field - mixed field - magnetic field A:
magnetic field
Q: Answer the following question given this paragraph: During a massive eruption all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations like the picture in Figure below . Q: After a massive eruption what will a mountain collapsing above an empty chamber create? Choices: - crater - cavern - valley - caldera A:
A: caldera
Question: Answer the following question given this paragraph: Of all electromagnetic waves, gamma rays have the shortest wavelengths and highest frequencies. Because of their very high frequencies, gamma rays have more energy than any other electromagnetic waves. Q: Which of the electromagnetic waves have the shortest wavelengths and highest frequencies? Choices: - ultraviolet - beta - plasma - gamma A:
Answer: gamma
*Question*
Answer the following question given this paragraph: Q: Like simple hormone pathways, hormone cascade pathways typically involve what kind of feedback? Choices: - effective - positive - neutral - negative A:
**Answer**
negative
Q: Answer the following question given this paragraph: Cartilage Templates Bone is a replacement tissue; that is, it uses a model tissue on which to lay down its mineral matrix. For skeletal development, the most common template is cartilage. During fetal development, a framework is laid down that determines where bones will form. This framework is a flexible, semi-solid matrix produced by chondroblasts and consists of hyaluronic acid, chondroitin sulfate, collagen fibers, and water. As the matrix surrounds and isolates chondroblasts, they are called chondrocytes. Unlike most connective tissues, cartilage is avascular, meaning that it has no blood vessels supplying nutrients and removing metabolic wastes. All of these functions are carried on by diffusion through the matrix. This is why damaged cartilage does not repair itself as readily as most tissues do. Throughout fetal development and into childhood growth and development, bone forms on the cartilaginous matrix. By the time a fetus is born, most of the cartilage has been replaced with bone. Some additional cartilage will be replaced throughout childhood, and some cartilage remains in the adult skeleton. Q: For skeletal development, the most common template is what? Choices: - calcium - membrane - collagen - cartilage A:
A: cartilage