Answer the following question given this paragraph: Perhaps the most familiar example of corrosion is the formation of rust on iron. Iron will rust when it is exposed to oxygen and water. The main steps in the rusting of iron appear to involve the following (Figure 17.17). Once exposed to the atmosphere, iron rapidly oxidizes. anode: Fe(s) Fe 2+(aq) + 2e . Q: Iron will do what when it is exposed to oxygen and water? Choices: - become hot - expand - contract - rust A:
rust
Answer the following question given this paragraph: Electrical Synapse While electrical synapses are fewer in number than chemical synapses, they are found in all nervous systems and play important and unique roles. The mode of neurotransmission in electrical synapses is quite different from that in chemical synapses. In an electrical synapse, the presynaptic and postsynaptic membranes are very close together and are actually physically connected by channel proteins forming gap junctions. Gap junctions allow current to pass directly from one cell to the next. In addition to the ions that carry this current, other molecules, such as ATP, can diffuse through the large gap junction pores. There are key differences between chemical and electrical synapses. Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is unidirectional. Signaling in electrical synapses, in contrast, is virtually instantaneous (which is important for synapses involved in key reflexes), and some electrical synapses are bidirectional. Electrical synapses are also more reliable as they are less likely to be blocked, and they are important for synchronizing the electrical activity of a group of neurons. For example, electrical synapses in the thalamus are thought to regulate slow-wave sleep, and disruption of these synapses can cause seizures. Q: Although fewer in number than chemical synapses, what type of synapses are found in all nervous systems and play important and unique roles? Choices: - duplicating synapses - beginning synapses - dual synapses - electrical synapses A:
electrical synapses
Q: Answer the following question given this paragraph: organelle in the cells of plants and algae where photosynthesis takes place. Q: What part of the cell in plants and algae does photosynthesis take place? Choices: - mitochondria - fibers - cell wall - organelles A:
A: organelles
Question: Answer the following question given this paragraph: An electric generator is a device that changes kinetic energy to electrical energy through electromagnetic induction. An electric transformer is a device that uses electromagnetic induction to change the voltage of electric current. Q: What device uses electromagnetic induction to change the voltage of electric current? Choices: - electric combustion - electric conductor - convection device - electric transformer A:
Answer: electric transformer
*Question*
Answer the following question given this paragraph: The cerebellum is just below the cerebrum. It coordinates body movements. Many nerve pathways link the cerebellum with motor neurons throughout the body. Q: What is just below the cerebrum and coordinates body movements? Choices: - hypothalamus - bloodstream - spinal cord - cerebellum A:
**Answer**
cerebellum
Q: Answer the following question given this paragraph: Primary pollutants enter the air directly. Some are released by natural processes, like ash from volcanoes. Most are released by human activities. They pour into the air from vehicles and smokestacks. Several of these pollutants are described below. Q: Ash that enters the air naturally as a result of a volcano eruption is classified as what kind of pollutant? Choices: - thick pollutant - secondary pollutant - natural pollutant - primary pollutant A:
A: primary pollutant