and enhance blood flow” (O ’Malley‚ 2010). The stomach is also protected by “tight intracellular junctions and a mucin layer over epithelial cells” (O ’Malley‚ 2010). Medications used to treat GERD include H2-receptor antagonists‚ antacids‚ and proton pump inhibitors in nonprescription and prescription strength. Antacids neutralize stomach acid‚ include Maalox‚ Mylanta‚ and Tums‚ and may provide quick relief. Antacids will not heal an esophagus damaged by stomach acid. H2-receptor antagonists
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atom consist of protons‚ electrons‚ and neutrons. b. The subatomic particles are found in either the electron cloud‚ or the nucleus. The electrons are found in the electron cloud‚ which circles the atom‚ and the protons and neutrons are found in the tiny nucleus of the atom. 2) How does the Atomic Mass # differ from the Atomic #? The atomic mass differs from the atomic number by the fact that the atomic mass is composed of the total number of protons and neutrons in
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three subatomic particles -- protons‚ neutrons and electrons. The center of an atom‚ which is called the nucleus‚ is composed of both protons and neutrons. Protons are positively charged‚ neutrons have no charge at all‚ and electrons are negatively charged. The proton-to-electron ratio is always one to one‚ so the atom as a whole has a neutral charge. But an atom’s properties can change a lot based on how many of each particle it has. If you change the number of protons‚ you create an entirely different
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Atomic Masses of atoms & molecules Mass number & atomic number Atomic structure (neutrons‚ protons & electrons) Mole concept & conversion Avogadro’s concept Empirical & molecular formulae Isotopes FHSC1114 Physical Chemistry Centre for Foundation Studies‚ UTAR Objectives To define relative atomic masses of atoms & molecules To define & determine mass no. & atomic no. To determine no. of neutrons‚ protons & electrons To understand mole concept & Avogadro’s concept To determine the empirical
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accompanied by protons – A hydrogen atom is lost (1 electron‚ 1 proton) Redox • During redox reactions‚ electrons carry energy from one molecule to another • Nicotinamide adenosine dinucleotide (NAD+) – Is an electron carrier – NAD+ accepts 2 electrons and 1 proton to become NADH – Reaction is reversible NAD+ to NADH • How may electrons does NAD+ need to be neutral? – 1 electron • How many electrons and protons in a hydrogen atom? – 1 proton – 1 electron • How many protons and electrons
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Rings"‚ "The Matrix"‚ et al.)‚ embedded itself into popular culture‚ and changed the genre of science fiction. The main reason Star Wars is such a pertinent film franchise is due to its omnipresence. In 15 years‚ Americans will watch the Star Wars saga in narrative sequence (episodes I-VII and onward) because of how prevalent the storyline is in America’s society. To begin with‚ George Lucas created "Star Wars Episode IV: A New Hope"‚ a film with a vast and complex plot. When the film naturally
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The respiration and photosynthesis cycle is the process by which plants and animals interact in a codependent and symbiotic manner to produce the nutrients‚ gases‚ and energy that they require to survive. Plants obtain energy from sunlight and use it to combine carbon dioxide and water into glucose and oxygen. This process is called photosynthesis. Animals eat plants containing glucose‚ and combine glucose and oxygen‚ releasing energy‚ water‚ and carbon dioxide. This process is called respiration
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Review Questions Exam 2 Although I try to cover all materials thoroughly in these questions‚ anything covered in lecture may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient?
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milli- 0.000‚000‚000‚001 0.000‚000‚001 0.001 centi- 0.01 deci- 0.1 deka- 10 hecto- 100 Kilo- 1‚000 Mega 1 kcal = 1000 cal 1 Cal= 1 kcal 1 cal = 4.184 1‚000‚000 • Neutral atoms contain the same number of electrons and protons. • Components of a mixture can be separated (purified) by physical means. • Physical changes alter a substance without any changes to the chemical composition. • Chemical change involves breaking down a substance into other substances. • Chemical
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The Mitochondrion The cell is the most basic unit of life. The cell serves as the place for processes such as cellular respiration‚ metabolism and energy production in the form of ATP‚ or adenosine triphosphate. Many organelles—small structures that help to carry out the daily operations of the cell‚ inhabit the cell such as the Golgi complex‚ the endoplasmic reticulum‚ the nucleus‚ or brain of the cell‚ and lysosomes. An organelle that is the place where most of the cell’s energy is generated is
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