Q: Q: What term describes an imbalance of attractive forces between liquid molecules at the surface of a liquid? Read this paragraph and choose the correct option from the provided answers: Surface tension is an imbalance of attractive forces between liquid molecules at the surface of a liquid. Choices: - currents tension - molecular tension - obsolute tension - surface tension A:
A: surface tension

Q: Q: What term refers to an animal that sleeps during the day and is active at night? Read this paragraph and choose the correct option from the provided answers: Many animals go through daily cycles. Daily cycles of behavior are called circadian rhythms. For example, most animals go to sleep when the sun sets down and wake up when the sun rises. These animals are active during the day and called diurnal. Other animals go to sleep when the sun rises and wake up when the sun sets. These animals are active during the night and called nocturnal. Many owls, like the owls in Figure below , are nocturnal. Like some other nocturnal animals, they have large eyes that are specially adapted for seeing when light levels are low. Choices: - diurnal - crepuscular - solitary - nocturnal A:
A: nocturnal

Q: Q: What type of machines generally have lower efficiency but greater mechanical advantage? Read this paragraph and choose the correct option from the provided answers: Compound machines generally have lower efficiency but greater mechanical advantage than simple machines. Choices: - calculation machines - simple machines - radical machines - compound machines A:
A: compound machines

Q: Q: What is another common term for single-unit smooth muscle? Read this paragraph and choose the correct option from the provided answers: Smooth muscle is organized in two ways: as single-unit smooth muscle, which is much more common; and as multiunit smooth muscle. The two types have different locations in the body and have different characteristics. Single-unit muscle has its muscle fibers joined by gap junctions so that the muscle contracts as a single unit. This type of smooth muscle is found in the walls of all visceral organs except the heart (which has cardiac muscle in its walls), and so it is commonly called visceral muscle. Because the muscle fibers are not constrained by the organization and stretchability limits of sarcomeres, visceral smooth muscle has a stress-relaxation response. This means that as the muscle of a hollow organ is stretched when it fills, the mechanical stress of the stretching will trigger contraction, but this is immediately followed by relaxation so that the organ does not empty its contents prematurely. This is important for hollow organs, such as the stomach or urinary bladder, which continuously expand as they fill. The smooth muscle around these organs also can maintain a muscle tone when the organ empties and shrinks, a feature that prevents "flabbiness" in the empty organ. In general, visceral smooth muscle produces slow, steady contractions that allow substances, such as food in the digestive tract, to move through the body. Multiunit smooth muscle cells rarely possess gap junctions, and thus are not electrically coupled. As a result, contraction does not spread from one cell to the next, but is instead confined to the cell that was originally stimulated. Stimuli for multiunit smooth muscles come from autonomic nerves or hormones but not from stretching. This type of tissue is found around large blood vessels, in the respiratory airways, and in the eyes. Choices: - abnormal muscle - lateral muscle - energies muscle - visceral muscle A:
A: visceral muscle