EXCRETORY SYSTEMS C All work in the same basic way: Body fluid is filtered by a special organ. Selectively permeable membranes remove urea or uric acid. Osmolarity is controlled by selective reabsorption/secretion. C 5 types of excretory systems: None in porifera‚ cnidaria Protonephridia in planaria & rotifers Metanephridia in annelids Malpighian tubules in terrestrial arthropods Kidneys (with nephrons) in vertebrates Protonephridia Have flame bulbs‚ tubules‚ and nephridopores. C Flame bulbs
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76 | 0.4 | 2.61 | 60 | 138 | 2.67 | 0.5 | 2.83 | 24 | 180 | 2.84 | 0.6 | 2.61 | 42 | 60 | 2.40 | Qualitative Data: Sucrose concentrations appeared to be colorless. Osmosis is is the net movement of solvent molecules through a partially permeable membrane into a region of higher solute concentration. Potato is made up of tiny cells and is protected by a cell membrane. Six solutions and water was taken to obtain the results of Osmosis. The potato pieces sank into the solutions. The change
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Oxalic acid Citric acid Malic acid Tartaric acid Oxalic acid is an organic compound with the formula H2C2O4. It is a colorless crystalline solid that dissolves in water to give colorless solutions. It is classified as a dicarboxylic acid. In terms of acid strength‚ it is much stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base‚ known as oxalate (C2O42−)‚ is a chelating agent for metal cations. Typically‚ oxalic acid occurs as the dihydrate with the formula
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energy‚ it is passive transport. Hypotheses Activity A: Diffusion -If glucose can pass through the semi-permeable membrane‚ then the solution inside the dialysis tubing will test positive for glucose after 48 hours. -If starch can pass through the semi-permeable membrane‚ then the solution outside the dialysis tubing will turn black. -If iodine (IKI) can pass through the semi-permeable membrane‚ then the solution in the cup will turn black. Activity B: Osmosis -If sucrose molarity influences
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Analysis During the experiment‚ a dialysis bag was used to mimic a cell membrane. Two ways why this model realistically represents a cell is because the dialysis bag is semi-permeable‚ like a cell. The bag was able to allow water in‚ as the size of the water molecule was small enough to be able to fit through the pores of the bag. Sucrose was not able to pass through as the molecules were too big to enter. This is similar to a cell because the size of a molecule can determine whether or not the
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following questions: A) Define osmosis. Osmosis is the movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration‚ aiming to equalize the solute concentrations on the two sides.[1][2][3] It may also be used to describe a physical process in which any solvent moves‚ without input of energy‚[4] across a semi permeable membrane (permeable to the solvent‚ but not the solute) separating two solutions of different concentrations.[5] Although osmosis
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Stolen Dialogue reveals how spoken language expresses meaning not only at the spoken level but through the implied meaning. It can be said that what’s left out of a conversation is sometimes more important than what is put in. Jane Harrison’s Stolen is an honest and compassionate play that follows the lives of five aboriginal kids who have been stolen from their families as part of the governments’ assimilationist agenda. Harrison employs a range of theatrical and written techniques to highlight
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Abigail sat still and quiet‚ hoping she would go unnoticed before falling victim like the others had. It was judgment day all over again and it had only been a week since the last. Each rock of her body drew eyes to her careless movements and Abigail’s inmates eye’s screamed at her to stop. If she continued to act out‚ she’d be chosen as the next meal‚ the next victim. The desire to escape brewed within her stomach. The pot was stirred with each plea from the current target‚ making Abigail’s insides
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Homeostasis is the ’maintenance of equilibrium in a biological system by means of an automatic mechanism that counteracts influences tending towards disequilibria’. Homeostatic mechanisms operate at all levels within living systems‚ including the molecular‚ cellular‚ and population levels. in humans homeostasis involves the constant monitoring and regulating of numerous factors including‚ oxygen and carbon dioxide levels‚ nutrient and hormone levels and inorganic and organic substances. The concentrations
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and cytoplasm 6) Plasma membrane is a thin‚ selectively permeable membrane‚ covering the cell and is made up of lipids and proteins. 7) Functions of plasma membrane : i) It separates the contents of a cell from its outside environment. ii) It regulates the flow of substances to and from the cell through diffusion‚ facilitated diffusion‚ active transport and endocytosis. 8) Osmosis is diffusion of water through a selectively permeable membrane. 9) A cell placed in different solutions: i
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