*Question*
Q: Some hormones produced by the anterior pituitary regulate the production of hormones by other tissues belonging to what system? Read this paragraph and choose the correct option from the provided answers: The anterior pituitary produces six hormones: growth hormone, prolactin, thyroid-stimulating hormone, adrenocorticotropic hormone, follicle-stimulating hormone, and luteinizing hormone. Growth hormone stimulates cellular activities like protein synthesis that promote growth. Prolactin stimulates the production of milk by the mammary glands. The other hormones produced by the anterior pituitary regulate the production of hormones by other endocrine tissues (Table 16.1). Choices: - nervous - digestive - cardiovascular - endocrine A:
**Answer**
endocrine

*Question*
Q: Breaking of weak bonds, which tend to form between positive and negative charges, does not require much what? Read this paragraph and choose the correct option from the provided answers: Hydrogen Bonds Ionic and covalent bonds are strong bonds that require considerable energy to break. However, not all bonds between elements are ionic or covalent bonds. Weaker bonds can also form. These are attractions that occur between positive and negative charges that do not require much energy to break. Two weak bonds that occur frequently are hydrogen bonds and van der Waals interactions. These bonds give rise to the unique properties of water and the unique structures of DNA and proteins. When polar covalent bonds containing a hydrogen atom form, the hydrogen atom in that bond has a slightly positive charge. This is because the shared electron is pulled more strongly toward the other element and away from the hydrogen nucleus. Because the hydrogen atom is slightly positive (+), it will be attracted to neighboring negative partial charges (). When this happens, a weak interaction occurs between the + charge of the hydrogen atom of one molecule and the charge of the other molecule. This interaction is called a hydrogen bond. This type of bond is common; for example, the liquid nature of water is caused by the hydrogen bonds between water molecules (Figure 2.7). Hydrogen bonds give water the unique properties that sustain life. If it were not for hydrogen bonding, water would be a gas rather than a liquid at room temperature. Choices: - catalyzation - heat - time - energy A:
**Answer**
energy

*Question*
Q: What is formed when an oxygen atom picks up a pair of hydrogen ions from a solution? Read this paragraph and choose the correct option from the provided answers: Choices: - liquid - turpentine - ammonia - water A:
**Answer**
water

*Question*
Q: Most oxygen in blood is bound to a protein called what, and carried to the tissues? Read this paragraph and choose the correct option from the provided answers: Transport of Oxygen in the Blood Although oxygen dissolves in blood, only a small amount of oxygen is transported this way. Only 1.5 percent of oxygen in the blood is dissolved directly into the blood itself. Most oxygen98.5 percentis bound to a protein called hemoglobin and carried to the tissues. Hemoglobin Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits (Figure 39.19). Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups are brighter red. As a result, oxygenated arterial blood where the Hb is carrying four oxygen molecules is bright red, while venous blood that is deoxygenated is darker red. Choices: - platelete - hydrogen - plasma - hemoglobin A:
**Answer**
hemoglobin