Answer the following question given this paragraph: The sodium-potassium pump is an active transport pump that exchanges sodium ions for potassium ions. Q: The sodium-potassium pump is an active transport pump that exchanges sodium ions for what? Choices: - nitrogen ions - oxygen ions - chlorine ions - potassium ions A:
potassium ions
(Question)
Answer the following question given this paragraph: Septa of the Heart The word septum is derived from the Latin for "something that encloses;" in this case, a septum (plural = septa) refers to a wall or partition that divides the heart into chambers. The septa are physical extensions of the myocardium lined with endocardium. Located between the two atria is the interatrial septum. Normally in an adult heart, the interatrial septum bears an oval-shaped depression known as the fossa ovalis, a remnant of an opening in the fetal heart known as the foramen ovale. The foramen ovale allowed blood in the fetal heart to pass directly from the right atrium to the left atrium, allowing some blood to bypass the pulmonary circuit. Within seconds after birth, a flap of tissue known as the septum primum that previously acted as a valve closes the foramen ovale and establishes the typical cardiac circulation pattern. Between the two ventricles is a second septum known as the interventricular septum. Unlike the interatrial septum, the interventricular septum is normally intact after its formation during fetal development. It is substantially thicker than the interatrial septum, since the ventricles generate far greater pressure when they contract. The septum between the atria and ventricles is known as the atrioventricular septum. It is marked by the presence of four openings that allow blood to move from the atria into the ventricles and from the ventricles into the pulmonary trunk and aorta. Located in each of these openings between the atria and ventricles is a valve, a specialized structure that ensures one-way flow of blood. The valves between the atria and ventricles are known generically as atrioventricular valves. The valves at the openings that lead to the pulmonary trunk and aorta are known generically as semilunar valves. The interventricular septum is visible in Figure 19.9. In this figure, the atrioventricular septum has been removed to better show the bicupid and tricuspid valves; the interatrial septum is not visible, since its location is covered by the aorta... Q: What term refers to a wall or partition that divides the heart into chambers? Choices: - valve - cartilage - cysts - septum A:
(Answer)
septum
Ques: Answer the following question given this paragraph: Diseases caused by roundworms are more common in developing countries. Many parasitic diseases caused by roundworms result from poor personal hygiene. Contributing factors may include. Q: More common in developing countries, parasitic diseases caused by roundworms often result from poor practice of what? Choices: - agriculture - education - preventative medicine - personal hygiene A:
Ans: personal hygiene
(Q).
Answer the following question given this paragraph: Helium may seem to be an exception, since it has only two valence electrons. This has to do with the fact that the n = 1 energy level has one s orbital and no p orbitals. As a result, the first energy level can be completely filled by just two electrons. It is the presence of a filled valence shell that gives noble gases their unusual stability, not anything intrinsic about the number 8. In addition to helium, the first few elements such as lithium, beryllium, and boron, have a particularly stable configuration with a pair of valence electrons rather that an octet. Q: How many valence electrons does helium have? Choices: - Five - six - three - two A:
(A).
two
Ques:Answer the following question given this paragraph: Rutherford's atomic model became known as the nuclear model . In the nuclear atom, the protons and neutrons, which comprise nearly all of the mass of the atom, are located in the nucleus at the center of the atom. The electrons are distributed around the nucleus and occupy most of the volume of the atom. It is worth emphasizing just how small the nucleus is compared to the rest of the atom. If we could blow up an atom to be the size of a large professional football stadium, the nucleus would be about the size of a marble. Q: In an atom, what two major types of particles are located in the nucleus? Choices: - electrons and neutrons - molecules and neutrons - ions and electrons - protons and neutrons A:

Ans:protons and neutrons
Ques: Answer the following question given this paragraph: Engineering is the practical application of scientific principles and discoveries to develop things that make our lives easier. Is medicine science or engineering? Justify your answer. Q: What is the practical application of scientific principles and discoveries to develop things that make our lives easier? Choices: - Movement - experiment - component - engineering A:
Ans:
engineering