Chapter 1 - Scientific Methods Objectives 1. Demonstrate a basic knowledge of classroom/science safety. 2. Understand the purpose of a hypothesis‚ and identify when a hypothesis should be used. 3. Be able to identify the independent and dependent variables in a formalized hypothesis. 4. Differentiate between an observation and an inference. 5. Contrast quantitative and qualitative observations. 6. Given a data table‚ draw and label a graph. Including a title‚ labeled units‚ and legend. 7
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Chapters 6‚7 &31 Question 1 1 out of 1 points Some enzymes contain molecules in the active site that help facilitate chemical transformations. These molecules are called: Selected Answer: coenzymes. Correct Answer: coenzymes. Question 2 1 out of 1 points People with high cholesterol levels often take drugs in an attempt to lower their cholesterol levels. One such drug is Lipitor. How does this drug work? Selected Answer: It acts as a competitive
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is semipermeable (selectively permeable) membrane‚ which means that it only allows certain molecules or ions to get in or to get out of the cell. There are three types of movement of particals across the cell: diffusion(and also facilitated diffusion)‚ osmosis and active transport. Diffusion and osmosis are passive movements and they don’t require any energy. Active transport requires ATP energy. OSMOSIS is the passive movement of water molecules across a partially permeable (semipermeable) membrane
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then filled with membrane-bound vesicles; each filled with a neurotransmitter. Calcium ions then flood into the presynaptic knob by diffusion. The influx of calcium ions triggers the exocytosis of the synaptic vesicles. The neurotransmitters are then released into the synaptic cleft. The neurotransmitters travel across the synaptic cleft towards the receptors by diffusion. There are two main categories of transmissions‚ excitatory transmissions and inhibitory transmissions. Excitatory transmissions
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Are naked eggs‚ eggs with no shell? What? You may think I am speaking about a hard boiled egg‚ but‚ no. Boiled eggs have their centers heated making the shell easily come off. Naked eggs have their shells taken off with one simple ingredient everyone has: vinegar. The acetic acid inside the vinegar strips the shell‚ calcium carbonate‚ away from the egg‚ the chemical formula is: CaCO3 (s) + 2 HC2H3O2 (aq)→Ca(C2H3O2)2 (aq) + H2O (l) + CO2 (g) (Imagination Toledo‚ 2017) Once the egg has been separated
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detail. Background: Glucose is liberated from dietary carbohydrate such as starch or sucrose by hydrolysis within the small intestine‚ and absorbed into the blood. GLUT-2 transporters carry glucose in to beta cells via insulin-independent facilitated diffusion. Through rapid glycolysis‚ intracellular glucose is immediately phosphorylated and therefore‚ cannot diffuse out (the transport protein is specific for glucose). Internal glucose (unphosphorylated) concentration remains low providing a large
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intestine‚ liver C) stomach‚ small intestine D) gall bladder‚ liver E) small intestine‚ gall bladder Answer: A 7) In the small intestine‚ amino acids and monosaccharides are moved into the mucosal cells by the process of A) diffusion. B) facilitated diffusion. C) active transport. D) endocytosis. E) exocytosis. Answer: C 8) The pancreas aids in the chemical digestion of food by A) producing mucin that lubricates the small intestine. B) releasing digestive enzymes and biocarbonate
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expected because of proper temperature regulation. When someone has to be placed on dialysis their body goes through a process that waste products are excreted from our bodies artificially by a process called diffusion. This process of removal of waste products in a healthy person is facilitated by kidneys. People that is diagnosed with kidney failure experiences problems with waste removal this is where dialysis comes into place. People with renal failure and are in the process of dialysis have been
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and it pumps protons from an area of low concentration to an area of high concentration. This requires energy since things like to move from an area of high concentration to an area of low concentration. An example of passive transport is facilitated diffusion. This is very easy since the particle is moving from an area of high concentration to an area of low concentration and through a channel protein made exactly for its size and shape. <br> <br>2. These membranes are very important to the electron
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Biology 101 FINAL EXAMINATION Spring‚ 2013 Name: Gabriel Euzebio Date: May 10‚ 2013 GENERAL INSTRUCTIONS: This final exam is worth 100 points. There are three sections. The Multiple Choice section has 50 questions worth 1 point each‚ for a total of 50 points. The Fill-In The Blanks section has 10 questions worth 1 point each‚ for a total of 10 points. For the Short Answer section‚ you must choose to answer 8 of the 12 questions‚ and each question is worth 5 points‚ for a total
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