Biology Lab T 10:50 The Effects of Alcohol on the Cell Membrane Introduction To understand the effects of alcohol on cell membranes can help one understand more about the effects of alcohol on human cells that are contained in the digestive system and the blood stream. It is important to study this effect due to the fact that it can lead to the understanding of the dangers of alcohol‚ over consumption‚ and even possibly alcohol poisoning. Performing this lab enables the students to have a firsthand
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Chapter 2: Patterns in Nature 1. Cell theory • 1590: Dutch grind glass lens (1st compound microscope) • 1665: Robert Hooke uses compound m. analysis thin cork slices as filled with air enclosed in boxes (cells) distinct • 1676: Dutch sees microorganism under microscope from pond water • 1824: French suggest all organisms composed of cells • 1827: Robert Brown (Brownian motion) discovered nucleus in plant cell • 1838: German produced evidence that all organisms made of cells • 1859:
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envelope 2. Endoplasmic reticulum (ER) a. Rough ER-has ribosomes b. Smooth ER-lacks ribosomes 3. Golgi apparatus 4. Lysosomes 5. Vacuoles a. food vacuole b. contractile vacuole c. central vacuole 6. Plasma membrane D. Mitochondria E. Chloroplasts F. Peroxisomes G. Cytoskeleton (Table on page 113) 1. Microtubules a. cilia b. flagella 2. Microfilaments (actin) a. muscle contraction b. pseudopodia c. cyotplasmic streaming
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prophase | B Chromosomes decoil to form chromatin. E Centrioles move to opposite ends of the cell. A Chromosomal centromeres split and chromosomes migrate to opposite ends of the cell. C Chromosomes align on the spindle equator. D Nuclear membrane and nucleolus disintegrate. Carbohydrates are stored in the liver and muscles in the form of this polysaccharide: B) glycogen. Mitochondria: B) contain some of the code necessary for their own duplication. Human cells have a pH range of
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You may also see proteins in the cell membrane that act as channels to help the movement along. Of course there is an in-between transport process where very small molecules are able to cross a semi-permeable membrane. Proteins are used to help move molecules more quickly. Since the cell membrane will not allow glucose to cross by diffusion‚ helpers are needed. The cell might notice outside fluids rushing by with free glucose molecules. The membrane proteins then grab one molecule and
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hard and fast‚ using more energy and oxygen than normal‚ eventually beginning to cause the cells to die. Both intracellular organelles have membranes. The lack of ATP affects the plasma membrane and that special calcium ATPases had stopped moving calcium from cytosol into the endoplasmic reticulum of his cardiac muscle cells The breakdown of the membranes of these structures affect the functions of his heart cells because they keep everything in order‚ helps to keep organelles organized and enables
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Covering and Lining Membranes 1. Complete the following chart. Tissue types: membrane composition (epithelial/connective) Membrane Common locations General functions cutaneous mucous serous synovial 2. Respond to the following statements by choosing an answer from the key. Key: a. cutaneous ‚ ‚ ‚ b. mucous c. serous d. synovial 1. membrane type in joints‚ bursae‚ and tendon sheaths 2. epithelium of this membrane is always simple squamous epithelium 3. membrane types not found
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What Effects Do Temperature And Standard Solution Have on a Beetroots Cell Membrane. Content: * Aim............................................................................................................. * Preliminary Work....................................................................................... * Hypothesis................................................................................................. * Risk Assessment.....................
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across the membrane if there were open Na+ channels? Na+ would diffuse into the cell. 75. Why did the free nerve ending respond to several different modalities? The sensory end of this nerve is less specialized. 76. Why didn’t the Pacinian corpuscle respond to high-intensity light? Light-transducing proteins are not present in the Pacinian corpuscle. 77. Why do you think TTX is not used during dental procedures? TTX irreversibly blocks voltage-gated sodium channels in axonal membranes. Why
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1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : c. they are too large. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down a concentration gradient
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