Answer the following question given this paragraph: Blood Volume The relationship between blood volume, blood pressure, and blood flow is intuitively obvious. Water may merely trickle along a creek bed in a dry season, but rush quickly and under great pressure after a heavy rain. Similarly, as blood volume decreases, pressure and flow decrease. As blood volume increases, pressure and flow increase. Under normal circumstances, blood volume varies little. Low blood volume, called hypovolemia, may be caused by bleeding, dehydration, vomiting, severe burns, or some medications used to treat hypertension. It is important to recognize that other regulatory mechanisms in the body are so effective at maintaining blood pressure that an individual may be asymptomatic until 1020 percent of the blood volume has been lost. Treatment typically includes intravenous fluid replacement. Hypervolemia, excessive fluid volume, may be caused by retention of water and sodium, as seen in patients with heart failure, liver cirrhosis, some forms of kidney disease, hyperaldosteronism, and some glucocorticoid steroid treatments. Restoring homeostasis in these patients depends upon reversing the condition that triggered the hypervolemia. Q: Referring to low what, hypovolemia may be caused by bleeding, dehydration, vomiting, severe burns, or some medications used to treat hypertension? Choices: - heart volume - brain volume - Secretion Volume - blood volume A:
blood volume
Answer the following question given this paragraph: The three smallest alkanes are methane, ethane, and propane. Some hydrocarbons have one or more carboncarbon double bonds (denoted C=C). These hydrocarbons are called alkenes. http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gobch04_s06_f02shows the formulas and the molecular models of the two simplest alkenes. Note that the names of alkenes have the same stem as the alkane with the same number of carbon atoms in its chain but have the ending -ene. Thus, ethene is an alkene with two carbon atoms per molecule, and propene is a compound with three carbon atoms and one double bond. Figure 4.7 Formulas and Molecular Models of the Two Simplest Alkenes. Q: Methane, ethane, and propane are three of the smallest what? Choices: - organisms - atoms - microorganisms - alkanes A:
alkanes
Q: Answer the following question given this paragraph: Energy is a measure of the amount of or potential for movement in something. The total amount of energy in the universe is always the same. This symmetry is called a conservation law. Conservation of energy is one of five conservation laws that govern our universe. A group of things (we'll use the word system ) has a certain amount of energy. Energy can be added to a system; for instance, when chemical bonds in a burning log break, they release heat. Energy can be lost from a system; for instance, when a spacecraft "burns up" its energy of motion during re-entry, it loses energy and the surrounding atmosphere gains the lost energy. A closed system is one for which the total energy does not change, or is conserved . In this chapter, we will often consider closed systems, for which the total amount of energy stays the same, but transforms from one kind to another. The transfer of energy from one system to another is called Work . Work is equal to the amount of energy transferred in (positive work) or out (negative work) of a system. Work is equal to the distance the object is moved multiplied by the amount of force in the direction of its motion. The rate at which work is done is called Power . Q: What happens when chemical bonds in a burning log break? Choices: - remove heat - hold heat - decrease heat - release heat A:
A: release heat
Question: Answer the following question given this paragraph: Blood flows through the heart in two separate loops. You can think of them as a "left side loop" and a "right side loop. " The right side of the heart collects oxygen-poor blood from the body and pumps it into the lungs, where it releases carbon dioxide and picks up oxygen. The left side carries the oxygen-rich blood back from the lungs into the left side of the heart, which then pumps the oxygen-rich blood to the rest of the body. The blood delivers oxygen to the cells of the body and returns to the heart oxygen-poor. Q: The right side of the heart collects what type of blood from the body? Choices: - oxygen-rich - dioxide-poor - potassium-rich - oxygen-poor A:
Answer: oxygen-poor
*Question*
Answer the following question given this paragraph: The thymus is found behind the sternum. The thymus produces hormones referred to as thymosins, which contribute to the development of the immune response in infants. Adipose tissue, or fat tissue, produces the hormone leptin in response to food intake. Leptin produces a feeling of satiety after eating, reducing the urge for further eating. Q: What produces hormones referred to as thymosins, which contribute to the development of the immune response in infants? Choices: - pancreas - heart - receptors - thymus A:
**Answer**
thymus
(Q).
Answer the following question given this paragraph: Q: Layers of placental transfer cells help transport nutrients to the embryos as they develop into what? Choices: - keratinocytes - fibroblasts - kinesins - sporophytes A:
(A).
sporophytes