Q: Q: Although what biochemicals circulate throughout the body and come into contact with many different cell types, they only affect cells that possess the necessary receptors? Read this paragraph and choose the correct option from the provided answers: How Hormones Work Hormones cause changes in target cells by binding to specific cell-surface or intracellular hormone receptors, molecules embedded in the cell membrane or floating in the cytoplasm with a binding site that matches a binding site on the hormone molecule. In this way, even though hormones circulate throughout the body and come into contact with many different cell types, they only affect cells that possess the necessary receptors. Receptors for a specific hormone may be found on or in many different cells or may be limited to a small number of specialized cells. For example, thyroid hormones act on many different tissue types, stimulating metabolic activity throughout the body. Cells can have many receptors for the. Choices: - Cells - organs - enzymes - hormones A:
A: hormones

Q: Q: Radar maps of venus show that it has mountains, canyons and volcanoes surrounded by plains of what? Read this paragraph and choose the correct option from the provided answers: Radar maps of Venus show that it has mountains, canyons and volcanoes surrounded by plains of lava. Choices: - helium - grasses - water - lava A:
A: lava

Q: Q: Alpha and beta decay occur when a nucleus has too many protons or an unstable ratio of what? Read this paragraph and choose the correct option from the provided answers: Alpha and beta decay occur when a nucleus has too many protons or an unstable ratio of protons to neutrons. When the nucleus emits a particle, it gains or loses one or two protons, so the atom becomes a different element. Gamma decay, in contrast, occurs when a nucleus is in an excited state and has too much energy to be stable. This often happens after alpha or beta decay has occurred. Because only energy is emitted during gamma decay, the number of protons remains the same. Therefore, an atom does not become a different element during this type of decay. Choices: - electrons to neutrons - atoms to neutrons - nucleus to neutrons - protons to neutrons A:
A: protons to neutrons

Q: Q: What occurs when two nonpolar liquids are mixed? Read this paragraph and choose the correct option from the provided answers: Nonpolar-nonpolar interactions occur when two nonpolar liquids are mixed. An example of this is the interaction between toluene and octane (see Figures above and below ). The interactions between a molecule of toluene and a molecule of octane are relatively weak, but so are the toluene-toluene and octane-octane interactions. Because no strong intermolecular forces (like those between water molecules) need to be broken for mixing to occur, no strong interactions need to be formed in order for mixing to be a favorable process. Toluene and octane will form a homogeneous mixture. The phrase "like dissolves like" applies to these mixtures as well. In this case, nonpolar dissolves nonpolar. Choices: - sediment - nonpolar interactions - refracted - nonpolar interactions - polar-nonpolar interactions - nonpolar-nonpolar interactions A:
A: nonpolar-nonpolar interactions