Q: Answer the following question given this paragraph: Nervous tissue consists of nerve cells, or neurons, which can send and receive electrical messages. Nervous tissue makes up the brain, spinal cord, and other nerves that run throughout the body. Q: What kind of messages do neurons send? A:

OPTIONS:
- minor messages
- Neurotic messages
- digestive messages
- electrical messages

A: electrical messages

input: OPTIONS:
- weight
- axis
- angles
- radius Now, answer this question: Answer the following question given this paragraph: One important characteristic that determines the way in which elements behave is the total size of each atom. Free atoms are spherical in shape, so the relative sizes of the elements can be compared by looking at each atom's atomic radius , which is the distance from an atom's nucleus to the electrons in the outermost orbitals. You might expect atoms to generally grow larger as they go up in atomic number (which is equal to the total number of electrons in the neutral atom). Indeed, if you look at a single group of the periodic table, this trend holds true. Iodine is larger than bromine, which is in turn larger than chlorine and fluorine. In the case of a single group, each successive row places electrons in a higher principal energy level. Since higher energy levels are farther from the nucleus on average, this results in a larger total volume occupied by the atom. Q: Free atoms are spherical in shape, so the relative sizes of the elements can be compared by looking at each atom's atomic what? A:
A:
output: radius

Answer the following question given this paragraph: Flickr:xiquinhosilva. Oceans are made of a solution of salt and water . CC BY 2.0. Q: Oceans are made of a solution of what? A:

OPTIONS:
- water and carbon
- salt and carbon
- salt and algae
- salt and water

Answer: salt and water

Problem: OPTIONS:
- location
- duration
- the intensity
- the atmosphere
Q: Answer the following question given this paragraph: Major exchange pools of carbon include organisms and the atmosphere. Carbon cycles more quickly between these components of the carbon cycle. Q: Major exchange pools of carbon include organisms and what else? A:
Answer: the atmosphere

Problem:OPTIONS:
- Recondition Mechanism
- load mechanism
- Adaptive Mechanism
- feedback mechanism

Answer the following question given this paragraph: Hormones control many cell activities, so they are very important for homeostasis. But what controls the hormones themselves? Most hormones are regulated by feedback mechanisms. A feedback mechanism is a loop in which a product feeds back to control its own production. Most hormone feedback mechanisms involve negative feedback loops. Negative feedback keeps the concentration of a hormone within a narrow range. Q: What is the term for a loop in which a product feeds back to control its own production? A:
****
A: feedback mechanism

Problem:OPTIONS:
- molecular spectrum
- radio spectrum
- phenomena spectrum
- electromagnetic spectrum

Answer the following question given this paragraph: Visible Light Visible light is the narrow segment of the electromagnetic spectrum to which the normal human eye responds. Visible light is produced by vibrations and rotations of atoms and molecules, as well as by electronic transitions within atoms and molecules. The receivers or detectors of light largely utilize electronic transitions. We say the atoms and molecules are excited when they absorb and relax when they emit through electronic transitions. Figure 24.16 shows this part of the spectrum, together with the colors associated with particular pure wavelengths. We usually refer to visible light as having wavelengths of between 400 nm and 750 nm. (The retina of the eye actually responds to the lowest ultraviolet frequencies, but these do not normally reach the retina because they are absorbed by the cornea and lens of the eye. ) Red light has the lowest frequencies and longest wavelengths, while violet has the highest frequencies and shortest wavelengths. Blackbody radiation from the Sun peaks in the visible part of the spectrum but is more intense in the red than in the violet, making the Sun yellowish in appearance. Q: Visible light is the narrow segment of what, to which the normal human eye responds? A:
****
A:
electromagnetic spectrum