Answer the following question given this paragraph: Humans have been studying the night sky for thousands of years. Knowing the motions of stars helped people keep track of seasons. With this information they could know when to plant crops. Stars were so important that the patterns they made in the sky were named. These patterns are called constellations . Even now, constellations help astronomers know where they are looking in the night sky. Q: What are observable patterns of stars found in the night sky called? Choices: - deformations - latitudes - deviations - constellations A:
constellations
(Question)
Answer the following question given this paragraph: Q: Many carbohydrates can enter glycolysis, most often after conversion to what? Choices: - sucrose - fructose - insulin - glucose A:
(Answer)
glucose
Ques: Answer the following question given this paragraph: The kidneys are responsible for removing excess H+ ions from the blood. If the kidneys fail, what would happen to blood pH and to hemoglobin affinity for oxygen? Factors That Affect Oxygen Binding The oxygen-carrying capacity of hemoglobin determines how much oxygen is carried in the blood. In addition to P O , 2 other environmental factors and diseases can affect oxygen carrying capacity and delivery. Carbon dioxide levels, blood pH, and body temperature affect oxygen-carrying capacity (Figure 39.20). When carbon + dioxide is in the blood, it reacts with water to form bicarbonate (HCO 3 ) and hydrogen ions (H ). As the level of carbon dioxide in the blood increases, more H+ is produced and the pH decreases. This increase in carbon dioxide and subsequent decrease in pH reduce the affinity of hemoglobin for oxygen. The oxygen dissociates from the Hb molecule, shifting the oxygen dissociation curve to the right. Therefore, more oxygen is needed to reach the same hemoglobin saturation level as when the pH was higher. A similar shift in the curve also results from an increase in body temperature. Increased temperature, such as from increased activity of skeletal muscle, causes the affinity of hemoglobin for oxygen to be reduced. Diseases like sickle cell anemia and thalassemia decrease the blood's ability to deliver oxygen to tissues and its oxygencarrying capacity. In sickle cell anemia, the shape of the red blood cell is crescent-shaped, elongated, and stiffened, reducing its ability to deliver oxygen (Figure 39.21). In this form, red blood cells cannot pass through the capillaries. This is painful when it occurs. Thalassemia is a rare genetic disease caused by a defect in either the alpha or the beta subunit of Hb. Patients with thalassemia produce a high number of red blood cells, but these cells have lower-than-normal levels of hemoglobin. Therefore, the oxygen-carrying capacity is diminished. Q: What are responsible for removing excess h+ ions from the blood? Choices: - liver nodes - intestinal walls - stomach chambers - kidneys A:
Ans: kidneys
(Q).
Answer the following question given this paragraph: Q: Unstable isotopes give off particles and energy as what? Choices: - electricity - radiation - ultraviolet light - radioactivity A:
(A).
radioactivity
Ques:Answer the following question given this paragraph: Biochemical compounds make up the cells and tissues of organisms. They are also involved in life processes, such as making and using food for energy. Given their diversity of functions, it's not surprising that there are millions of different biochemical compounds. However, they can be grouped into just four main classes: carbohydrates, proteins, lipids, and nucleic acids. The classes are summarized in Table below and described in the rest of this lesson. Q: What type of compounds make up the cells and tissues of organisms? Choices: - hormonal compounds - productive compounds - organic compounds - biochemical compounds A:

Ans:biochemical compounds
Ques: Answer the following question given this paragraph: Q: What two ways do channels respond during membrane depolarization? Choices: - sequentially and identically - independently and typically - typically and sequentially - independently and sequentially A:
Ans:
independently and sequentially