Abscisic Acid and Stomatal Closure Abscisic acid is a single compound unlike the auxins‚ gibberellins‚ and cytokinins. It was called "abscisin II" originally because it was thought to play a major role in abscission of fruits. Though ABA generally is thought to play mostly inhibitory roles‚ it has many promoting functions as well. In 1963‚ abscisic acid was first identified and characterized by Frederick Addicott and his associates. They were studying compounds responsible for the abscission
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Pathogenesis. Basically‚ ALI is an acute lung inflammation that causes disruption of the pulmonary alveolar- capillary barriers (alveolar epithelium‚ interstitium‚ and microvascular endothelium)‚ which occurs in three phases; acute or exudative phase‚ resolution phase and fibrotic phase [8‚9]. 1. Acute or exudative phase (<72h)‚ which characterized by a disruption of the alveolar capillary membrane leading to leakage of protein rich fluid into the interstitium and alveolar space‚ and extended
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Structure & Function of Plants Review: Plant Structure‚ Growth‚ and Development I 1. How does the vascular tissue system enable leaves and roots to function together in supporting growth and development of the whole plant? 2. When you eat the following‚ what plant structure are you consuming? Brussels sprouts‚ celery sticks‚ onions‚ and carrot sticks. 3. Characterize the role of each of the three tissue systems in a leaf. 4. Describe at least three specializations in plant organs and
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1. Describe the fluid-mosaic model of a plasma membrane. Discuss the role of the membrane in the movement of materials through it by each of the following processes: a. Active transport b. Passive transport The plasma membrane is a semi permeable barrier that separates the inside of the cell from the outside environment. The plasma membrane is made up of carbohydrates‚ cholesterol‚ proteins‚ and a lipid bilayer‚ or double layer of lipids. The plasma membrane may be known as a fluid mosaic
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small molecules can pass through the semipermeable membrane easily‚ through diffusion (https://www.biologycorner.com). Water‚ however‚ has a slightly more difficult time diffusing‚ and diffuses in a different way‚ called osmosis. Osmosis involves aquaporins‚ specialized proteins in the phospholipid bilayer‚ to facilitate the diffusion of water across the gradient to reach equilibrium. Water potential‚ or the measure of potential energy that water has‚ is determined by solute concentration and pressure
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For each part that was tested a made of the graph‚ the subject that was used was the one that had the most consist numbers. What this means is that isotonic urine flow subject is not necessarily isotonic creatinine concentration subject. The kidney’s load for this was either a hypotonic‚ isotonic‚ alkalotic‚ or no solution at all. Based on the data above‚ some hypothesis were validated and other were not. In both the hypotonic and isotonic‚ the urine flow of the subjects increased as expected. This
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Bio 142 Review Questions Chapter 25‚ Urinary System 1. Know functions of urinary system. The Primary Functions of the Urinary System include: 1. Excretion – removal of organic wastes from body fluids 2. Elimination – discharge of waste products 3. Homeostatic regulation – of blood plasma volume and solute concentration • Kidneys are major excretory organs o Like a city’s water treatment plant! • Urinary bladder
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The Excretory System • Main functions of the excretory system are: o to concentrate wastes and expel them from the body o to regulate fluids and water within the body • Most metabolic wastes and toxins are dissolved in the body’s internal environment‚ so the maintenance of the body fluids is essential for keeping the body free of waste products enabling it to function properly. Excretion in Invertebrates and Non-mammaliam Vertebrates • Single celled organisms and simple multicellular
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HOMEOSTASIS GROUP 5 RESEARCHERS MUNASHE MUDUMISO R136670X TAWANDA CHIKUKUZA R136602Y JOHN MTINIWA R136553H LEARNMORE SHOTI R136619N WELLINGTON CHIPADZE R113616B MASIMBA Homeostasis is the ability to maintain a stable internal body environment in an ever changing outside world. It can also be said to be the body’s attempt to maintain a relatively constant internal environment in the face of constantly
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Dialysis Experiment: Diffusion of Polar and Non-Polar Substances Introduction It was hypothesized that if the solution is polar‚ then it will diffuse through the dialysis bag. All five solutions of starch‚ albumin‚ sodium sulfate‚ sodium chloride‚ and glucose were placed inside of a dialysis bag‚ which was then placed in a culture dish filled with distilled water. After waiting 60 minutes‚ for the solutions to escape the bag‚ the distilled water was tested for all five solutions through individual
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